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ORIGINAL RESEARCH article

Front. Phys., 25 July 2022

Sec. Statistical and Computational Physics

Volume 10 - 2022 | https://doi.org/10.3389/fphy.2022.924310

This article is part of the Research TopicRecent Advances in Applied Nonlinear Evolution Systems: Fluid Dynamics and Biological FlowsView all 4 articles

The Efficient Techniques for Non-Linear Fractional View Analysis of the KdV Equation

Hassan Khan,Hassan Khan1,2Qasim KhanQasim Khan1Fairouz TchierFairouz Tchier3Gurpreet SinghGurpreet Singh4Poom Kumam,
Poom Kumam5,6*Ibrar UllahIbrar Ullah1Kanokwan SitthithakerngkietKanokwan Sitthithakerngkiet7Ferdous TawfiqFerdous Tawfiq3
  • 1Department of Mathematics, Abdul Wali Khan Uniuersity Mardan, Mardan, Pakistan
  • 2Department of Mathematics, Near East University, North Nicosia, Turkey
  • 3Department of Mathematics, College of Science, King Saud University, Riyadh, Saudi Arabia
  • 4School of Mathematical Sciences, Dublin City University, Dublin, Ireland
  • 5Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
  • 6Theoretical and Computational Science (TaCS) Center, Department of Mathematics, Faculty of Science, King Mongkut’s University of Technology Thonburi (KMUTT), Bangkok, Thailand
  • 7Intelligent and Nonlinear Dynamic Innovations Research Center, Department of Mathematics, Faculty of Applied Science, King Mongkut’s University of Technology North Bangkok (KMUTNB), Bangkok, Thailand

The solutions to fractional differentials equations are very difficult to investigate. In particular, the solutions of fractional partial differential equations are challenging tasks for mathematicians. In the present article, an extension to this idea is presented to obtain the solutions of non-linear fractional Korteweg–de Vries equations. The solutions comparison of the proposed problems is done via two analytical procedures, which are known as the Residual power series method (RPSM) and q-HATM, respectively. The graphical and tabular analysis are presented to show the reliability and competency of the suggested techniques. The comparison has shown the greater contact between exact, RPSM, and q-HATM solutions. The fractional solutions are in good control and provide many important dynamics of the given problems.

1 Introduction

Fractional Calculus literature dates back to 1,695 and considered to be as old as classical calculus. L’Hospital was the first to write a letter to Leibnitz about the concept of the time-fractional derivative, and progress in that direction has been gradual since that time. Later on N. H. Abel, L. Euler, J. Liouvilles, H. Holmgren, J. B. J. Fourier, A. K. Gruwald, P. S. Laplace, B. Riemann, E. R. Love, A. V. Letnikov, A. Krug, J. Hadamard, S. Pincherle, H. Weyl, O. Heaviside are among the few Nobel laureates in mathematics till the 20th century. Other Mathematicians such as H. Laurent, G.H. Hardy, and J. E. Liitlewood, as well as P. Levy, A. Marchand, H. T. Davis, A. Zygmund, A. Erde’lyi, H. Kober, D. V. widder, and M. Riesz, have contributed a lot towards FC. After 1930, there was infrequent additional research in this subject.

FC is a substitute calculus that may be used to appropriately design a variety of phenomena such as Optics [1], Hepatitis B Virus [3], Tuberculosis [4], Air foil [5], modelling of Earth quack nonlinear oscillation [6], Propagation of Spherical Waves [7], the fluid traffic [8], Chaos theory [9], Finance [11], economics [12], Zener [10], Cancer chemotherapy [13], Electrodynamics [14], heat transfer model [15], the fractional nonlinear space-time nuclear model [16], traffic flow model [17], Poisson-NerstPlanck diffusion [18], Pine wilt disease [19], Diabetes [20], fractional COVID-19 Model [2], biomedical and biological [21] and other applications in various branches of research [2224]. Fractional differential and integral equations have been found to be the most desired tools for appropriately designing numerous physical processes. The polymers model with rheological characteristics, is the most important design that has been represented by FDEs. some others advanced development of FDEs includes bio tissues, nuclear mechanics, ractional diffusion, involuntary vibrations and thermo-elasticity [2531].

Many mathematicians have made their efforts to develop or implement numerical and analytical techniques for the solutions of non-linear fractional partial differential equations (FPDEs). In this context, Hassan et al. have presented the solutions of some non-linear FPDEs and their systems in [3235]. Many Other important and efficient techniques that have been implemented to solve FPDEs and their systems are Iterative Laplace transform method [38], optimal homotopy asymptotic method (OHAM) [39], extended direct algebraic method (EDAM) [49], Adomian decomposition method (ADM) [40, 41], Natural transform method [42], the Finite difference method (FDM) [43], the (G/Ǵ)-expansion method [48], the Homotopy perturbation transform technique along with transformation (HPTM) [44, 45, 47], standard reductive perturbation method [50], the Haar wavelet method (HWM) [51, 52], spectral collocation method (SCM) [46], the Variational iteration procedure with transformation (VITM) [58] and the differential transform method (DTM) [5355]. In similar way, the novel techniques have been used for the solutions of Korteweg–de Vries equation and time-fractional Drinfeld–Sokolov–Wilson system and can be cited in [56, 57].

In this article, We are working with two efficient techniques, namely residual power series method (RPSM) and q-homotopy analysis transform method (q-HATM) to obtain the analytical solutions of Korteweg–de Vries equation (KdV) equations. The goal of the present research is to use q-HATM and RPSM to visualise the solutions to the KdV equations. The RPSM has a simple and fluent implementation in both strongly linear and nonlinear IVPs. RPSM [59] is used to construct power series solutions with the exception of perturbation and linearization. For an approximate analytical solution, the suggested approach uses a polynomial. The suggested approach is dominant over the Taylor series method because it allows to control large-scale computing. RPSM is used for systematically investigating the coefficients of a series form solutions. A fundamental advantage of RPSM is that it can be applied to other FPDEs and system of FPDEs. Another method which is known as q-HATM [36, 37] is the result of combining HAM and LTM when q[0,1n]. The benefit of q-HATM is that it adds two strong computational approaches to solve FPDEs. The goal of this method is to create a precise function that can be solved using homotopy polynomials. The illustrative examples demonstrate the viability of q-HATM. The proposed approaches are similar to implement for multi-dimensional non-integer physical problems.

In this research paper, the solutions of various FPDEs related to KdV equations are investigated by using the proposed analytical techniques, q-HAM and RPSM, at the same time. The suggested techniques have different procedure to obtain the solutions of fractional KdV equations. The obtained results of the two innovative techniques are compared to one another as well as with the exact solutions to the problems. The obtained results are displayed by using graphs and tables. The absolute errors at different fractional order are calculated and have shown the greater accuracy of the proposed methods. The RPSM procedure is simple and has a direct implementation to the targeted problems. Moreover, the linearity of the problems is handled in a very sophisticated manner as compare to other analytical procedures. The exact and approximate solutions for both techniques are very closed to the exact solutions of the given KdV equations. The fractional solutions are very convergent towards the integer order solutions and obey the higher efficiency of the present techniques. This paper is structured as follows: Section 2 represent some basic definition. Section 3 is the methodology while in Section 4 some numerical results are compared by using two powerful methods. Section 5 is the conclusion section. References are present at the end of the paper.

2 Basic Definitions

In this section we will discuss some important definitions.

2.1 Caputo Operator

For function f(I), the Caputo derivative of order δ is define as [60, 61].

DδIf(I)={dnf(I)dIn,δ=nN,1Γ(nδ)I0(Iς)nδ1f(n)(ς)dς,n<δ<n+1,nN.

2.2 Definition

An expansion of power series (PS) at point I=I0 is known as fractional PS and is given by [63].

n=0an(II0)nδ=a0+a1(II0)δ+a2(II0)2δ+,&n=0fn(ς)(II0)nδ=f0(ς)+f1(ς)(II0)δ+f2(ς)(II0)2δ+,n1<δn,II0,

Note: FPS can be expanded at point I0 as

y(ς,I)=n=0DnδIy(ς,I0)Γ(nδ+1)(II0)nδ,0n1<δm,ςI,I0I<I0+R,

which is the Taylor’s series expansion form.

2.3 Laplace Transform

The LT for continuous function g(I) is defined as [62].

G(s)=L[g(I)]=0esIg(I)dI,

here G(s) is the LT for the function g(I).

2.4 Definition

The LT L[y(ς,I)] of Caputo fractional derivative is given by [62].

L[DnδIy(ς,I)]=snδL[y(ς,I)]n1k=0snδk1yk(ς,0),n1<nδn.(1)

3 Methodology of RPSM and q-HATM for FPDEs

Consider a generalized non-linear FPDEs,

DδIy(ς,I)=N(y(ς,I))+R(y(ς,I)),n1<δn,I>0,(2)

with initial condition,

y(ς,0)=f(ς),(3)

where DδI is the Caputo type fractional derivative, R is linear and N are non-linear terms.

3.1 RPSM Procedure

The procedure of RPSM [64] for the solution of Eq. 2 is given below.

Let

y(ς,I)=n=0fn(ς)InδΓ(1+nδ),0<δ1,<ς<,0I<R,(4)

the kth truncated series for y(ς,I) is given as

yk(ς,I)=kn=0fn(ς)InδΓ(1+nδ),(5)

for k = 0 Eq. 5, become as

y0(ς,I)=y(ς,0)=f(ς),(6)

further Eq. 5, implies that,

yk(ς,I)=f(ς)+kn=1fn(ς)InδΓ(1+nδ),k=1,2,,(7)

for Eq. 2, residual function is presented as

Resy(ς,I)=DδIy(ς,I)N(y(ς,I))R(y(ς,I)),(8)

so, the kth residual function becomes

Resy,k(ς,I)=DδIyk(ς,I)N(yk(ς,I))R(yk(ς,I)).(9)

As in [65, 66], it show that Res(ς,I)=0 and limnResk(ς,I)=Res(ς,I). Therefore, DnδIResy(ς,I)=0, The fractional derivative of a constant is 0 in the Caputo definition so DnδIRes(ς,0)=DnδIResk(ς,0)=0, k = 0, 1, … , n that is the fractional derivatives DnδI of Resy(ς,I) and Resk(ς,I) are matching at I=0 for each n = 0, 1, … , k;.

To calculate f1(ς), f2(ς), f3(ς), …, we put k = 0, 1, … , in Eq. 5, and putting in Eq. 7, after that we take D(k1)δI on both side of the result we obtain

D(k1)δIResy,k(ς,0)=0,k=1,2,.(10)

3.2 q-HATM Procedure

Applying LT to Eq. 2 and using the property, we obtained

sδL{y(ς,I)}n1k=0sδk1y(k)(ς,0)+L{Ry(ς,I)+Ny(ς,I)}=L{g(ς,I)}.(11)
Eq. 11, implies that
L{y(ς,I)}1sδn1k=0sδk1y(k)(ς,0)+1sδL[Ry(ς,I)+Ny(ς,I)g(ς,I)]=0.(12)

The non-linear operator is given by

N[θ(ς,I;q)]=L{θ(ς,I;q)}1sδn1k=osδk1θ(k)(ς,I;q)(0+)+1sδL[Ry(ς,I)+Ny(ς,I)g(ς,I)],(13)

the real function of ς, I and q is q ∈ [0, 1n], θ(ς,I;q).Construct a homotopy as [67].

(1nq)[L{θ(ς,I;q)y0(ς,I)}]=qH(ς,I)N[θ(ς,I;q)].(14)

In Eq. 14 L is the Laplacian operator, h ≠ 0 is the auxiliary parameter, H(ς,I) is non-zero auxiliary function, n1,q[0,1n] are the embedding parameter, θ(ς,I;q) is an unknown function and the initial condition y0(ς,I).

As for q = 0 and q=1n, the obtain result is

θ(ς,I;0)=y0(ς,I) and θ(ς,I;1n)=y(ς,I).(15)

By using Taylor theorem θ(ς,I;q) should be expressed as;

θ(ς,I;q)=y0(ς,I)+m=1ym(ς,I)qm,(16)

where

ym(ς,I)=1m![mθ(ς,I;q)qm]||q=0.(17)

As a consequence, we obtain the following result

ym(ς,I)=y0(ς,I)+m=1ym(ς,I)(1n)m.(18)

In Eq. 14, zeroth order solution, which can be obtained by differentiating m-times and setting q = 0, implies that

L{ym(ς,I)kmym1(ς,I)}=H(ς,I)Rm(ym1).(19)

In Eq. 19 the vectors are defined as

ym={y0(ς,I),y1(ς,I),,ym(ς,I)}.

By taking inverse LT of Eq. 19, we get

ym(ς,I)=km(ς,I)ym1(ς,I)+L1{H(ς,I)Rm(ym1)},(20)

as

Rm(ym1)=1(m1)![m1N[θ(ς,I;q)]qm1]||q=0,

and

km={0,m1,n,m>1.(21)

The q-HATM series solution to the given problem is Eqs 20, 21.

4 Numerical Results

We used RPSM and q-HATM to solve the nonlinear KDV equation in this part.

4.1 Example

Consider the fractional order KDV equation of the form [68].

δyIδ3y2ς+3yς3=0,0<δ1,(22)

with initial condition,

y(ς,0)=6ς,

the exact solution of the Eq. 22, is

y(ς,I)=6ς136I.

4.1.1 RPSM-Solution

First Approximation.

Using RPSM, we get the Kth truncated series of the solution of Eq. 29.

yk(ς,I)=kn=0fn(ς)InδΓ(1+nδ),(23)
Equation 29 has a zeroth RPSM approximate solution, which is
y0(ς,I)=y(ς,0)=f(ς).

The Eq. 23, can be represent as

yk(ς,I)=f(ς)+kn=1fn(ς)InδΓ(1+nδ),k=1,2,,(24)

set k = 1 in Eq. 24, we obtain

y1(ς,I)=f(ς)+f1(ς)IδΓ(1+δ),

where y (ς, 0) = f(ς) = 6ς

y1(ς,I)=6ς+f1(ς)IδΓ(1+δ).

The residual function of Eq. 22, is given by

Resy(ς,I)=δyIδ3y2ς+3yς3.

The Kth residual function Resy(ς,I), is given by

Resyk(ς,I)=δykIδ3y2kς+3ykς3,(25)

put k = 1 in the Eq. 25 we get

Resy1(ς,I)=δy1Iδ3y21ς+3y1ς3,
Resy1(ς,I)=f1(ς)6(6ς+f1(ς)IδΓ(1+δ))(6+f1(ς)IδΓ(1+δ))+f1(ς)IδΓ(1+δ),(26)

put Resy1 (ς, 0) = 0 in Eq. 26, we get

f1(ς)=216ς.

Second approximation.

Put k = 2 in Eq. 24, we get

y2(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

where f(ς) = 6ς, and f1(ς) = 216ς,

y2(ς,I)=6ς+216ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

put k = 2 in Eq. 25, we get

Resy2(ς,I)=δy2Iδ3y22ς+3y2ς3,
Resy2(ς,I)=(216ς+f2(ς)IδΓ(1+δ))6(6ς+216ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(6+216IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))+f2(ς)I2δΓ(1+2δ),(27)

we know that

D(k1)δIResyk(ς,I)=0,(28)

put k = 2 in the Eq. 28, we get

DδIResy2(ς,I)=0.

Applying DδI on both sides of the Eq. 27,

DδIResy2(ς,I)=f2(ς)6[(6ς+216ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(216+f2(ς)IδΓ(1+δ))+(216ς+f2(ς)I2δΓ(1+2δ))(6+216IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))]+f2(ς)IδΓ(1+δ),(29)

put DδIResy2(ς,0)=0 in Eq. 29, we get

f2(ς)=15552ς.

Third approximation.

Put k = 3 in Eq. 24, we get

y3(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

where f(ς) = 6ς, f1(ς) = 216ς, and f2(ς) = 15552ς,

y3(ς,I)=6ς+216ςIδΓ(1+δ)+15552ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

put k = 2 in Eq. 25, we get

Resy3(ς,I)=δy3Iδ3y23ς+3y3ς3,
Resy3(ς,I)={(216ς+15552ςIδΓ(1+δ)+f3(ς)I2δΓ(1+2δ))6[(6ς+216ςIδΓ(1+δ)+15552ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(6+216IδΓ(1+δ)+15552I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))]+f3(ς)I3δΓ(1+3δ),(30)

put k = 3 in Eq. 28, we get

D2δIResy3(ς,I)=0.

Applying D2δI on both sides of the Eq. 30,

D2δIResy3(ς,I)=f3(ς)6[(6ς+216ςIδΓ(1+δ)+15552ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(15552ς+f3(ς)IδΓ(1+δ))+(15552ς+f3(ς)IδΓ(1+δ))(6+216IδΓ(1+δ)+15552I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))]+f3(ς)IδΓ(1+δ),(31)

put D2δIResy3(ς,0)=0 in Eq. 31, we get

f3(ς)=1119744ς.

In terms of RPSM, the solution of Eq. 29 is as follows:

y(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ)+,
y(ς,I)=6ς+216ςIδΓ(1+δ)+15552ςI2δΓ(1+2δ)+1119744ςI3δΓ(1+3δ)+.

4.1.2 q-HATM Solution

First Approximation.

Taking LT of Eq. 22, and simplifying

L[y(ς,I)]1sδsδ1y0(ς,0)1sδL(3y2ς23yς3)=0,
L[y(ς,I)]6ςs1sδL(3y2ς23yς3)=0.

N is a nonlinear term that can be expressed as

N[θ(ς,I;q)]=L[θ(ς,I;q)]6ςs1sδL(3y2ς23yς3).

Using the q-HATM approach

ym(ς,I)=kmym1(ς,I)+hL1[Rm(ym1)],(32)

take m = 1 in Eq. 32, we obtain

y1(ς,I)=k1y0(ς,I)+hL1[R1(y0)],(33)
Rm(ym1)=L(ym1)(1kmn)6ςs1sδL(3y2m1ς3ym1ς3),(34)

use m = 1 in Eq. 34, we obtain

R1(y0)=L(y0)(1k1n)6ςs1sδL(3y20ς23y0ς3),
=216ςsδ+1.

Put in Eq. 33, we get

y1(ς,I)=hL1[216ςsδ+1],
y1(ς,I)=216hςIδΓ(1+δ).

Second Approximation

Put m = 2 in the Eq. 32, we get

y2(ς,I)=k2y1(ς,I)+hL1[R2(y1)],(35)

put m = 2 in Eq. 34, we get

R2(y1)=L(y1)(1k2n)6ςs1sδL(3y21ς23y1ς3),
=216hςs1+δ279936h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2.

Put in Eq. 35, we get

y2(ς,I)=216nhςIδΓ(1+δ)+hL1[216hςsδ+1279936h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2],
y2(ς,I)=216nhςIδΓ(1+δ)216h2ςIδΓ(1+δ)279936h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2.

Third Approximation

Put m = 3 in the Eq. 32, we get

y3(ς,I)=k3y2(ς,I)+hL1[R3(y2)],(36)

put m = 3 in Eq. 34, we get

R3(y2)=L(y2)(1k3n)6ςs1sδL(3y22ς23y2ς3),
R3(y2)=216nhςsδ+1216h2ςsδ+1279936h3ς(Γ(2δ+1))(Γ(3δ+1))s3δ+1(Γ(1+δ))26[(216nhςs2δ+1216h2ςs2δ+1279936h3ς(Γ(2δ+1))(Γ(3δ+1))s4δ+1(Γ(1+δ))2)(216nhs2δ+1216h2s2δ+1279936h3(Γ(2δ+1))(Γ3δ+1)s4δ+1(Γ(1+δ))2)],

put in Eq. 36 and simplifying we get

y3(ς,I)=216n2hςIδΓ(1+δ)216nh2ςIδΓ(1+δ)279936nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2216nh2ςIδΓ(δ+1)216h3ςIδΓ(δ+1)279936h4ςI3δ(Γ(2δ+1))(Γ(1+δ))26[(216nh2ςI2δΓ(2δ+1)216h3ςI2δΓ(2δ+1)279936h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)(216nh2I2δΓ(2δ+1)216h3I2δΓ(2δ+1)279936h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

In terms of q-HATM, the solution of Eq. 22 is shown as

y(ς,I)=y0(ς,I)+y1(ς,I)+y2(ς,I)+y3(ς,I),
y(ς,I)=6ς216hςIδΓ(1+δ)216nhςIδΓ(1+δ)216h2ςIδΓ(1+δ)279936h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2216n2hςIδΓ(1+δ)216nh2ςIδΓ(1+δ)279936nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2216nh2ςIδΓ(δ+1)216h3ςIδΓ(δ+1)279936h4ςI3δ(Γ(2δ+1))(Γ(1+δ))2+6[(216nh2ςI2δΓ(2δ+1)+216h3ςI2δΓ(2δ+1)+279936h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)(216nh2I2δΓ(2δ+1)+216h3I2δΓ(2δ+1)+279936h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

4.2 Example

The fractional order K (2,2) equation is [68].

δyIδ+y2ς+3y2ς3=0,0<δ1,(37)

having initial condition

y(ς,0)=ς.

Exact solution is

y(ς,I)=ς1+2I.

4.2.1 RPSM-Solution

First Approximation.Using RPSM, we get the Kth truncated series of the solution of Eq. 37

yk(ς,I)=kn=0fn(ς)InδΓ(1+nδ),(38)

Equation 37 has a zeroth RPSM approximate solution, which is

y0(ς,I)=y(ς,0)=f(ς),

Equation 38 can be represent as

yk(ς,I)=f(ς)+kn=1fn(ς)InδΓ(1+nδ),k=1,2,(39)

for k = 1 Eq. 39, become

y1(ς,I)=f(ς)+f1(ς)IδΓ(1+δ),

where y (ς, 0) = f(ς) = ς

y1(ς,I)=ς+f1(ς)IδΓ(1+δ),

the residual function of Eq. 37, is given by

Resy(ς,I)=δyIδ+y2ς+3y2ς3,

the Kth residual function Resy(ς,I), is given by

Resyk(ς,I)=δykIδ+y2kς+3y2kς3,(40)

put k = 1 in the Eq. 40, we get

Resy1(ς,I)=δy1Iδ+y21ς+3y21ς3,
Resy1(ς,I)=f1(ς)+2{[(ς+f1(ς)IδΓ(1+δ))(1+f1(ς)IδΓ(1+δ))]+[(ς+f1(ς)IδΓ(1+δ))(f1(ς)IδΓ(1+δ))]+[(1+f1(ς)IδΓ(1+δ))(f1(ς)IδΓ(1+δ))]+[(1+f1(ς)IδΓ(1+δ))(f1(ς)IδΓ(1+δ))]+[(f1(ς)IδΓ(1+δ))(1+f1(ς)IδΓ(1+δ))],(41)

we know that

Resy1(ς,0)=0,(42)

use Eq. 42 in Eq. 41, we get

f1(ς)=2ς.

Second approximation

Put k = 2 in Eq. 39, we get

y2(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

where f(ς) = ς, and f1(ς) = −2ς

=ς2ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

put k = 2 in Eq. 40, we get

Resy2(ς,I)=δy2Iδ+y22ς+3y22ς3,
=2ς+f2(ς)IδΓ(1+δ)+2[(ς2ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))×(12IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))]+2[(ς2ςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(f2(ς)I2δΓ(1+2δ))+(12IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(f2(ς)I2δΓ(1+2δ))]+2[(12IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(f2(ς)I2δΓ(1+2δ))+(f2(ς)I2δΓ(1+2δ))(12IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))],(43)

we know that

D(k1)δIResyk(ς,I)=0,(44)

put k = 2 in Eq. 44

DδIResy2(ς,I)=0,

applying DδI on both sides of the Eq. 43, we have

DδIResy2(ς,I)=f2(ς)+2[(2ς+f2(ς)IδΓ(1+δ))(2+f2(ς)IδΓ(1+δ))]+2[(2ς+f2(ς)IδΓ(1+δ))(f2(ς)IδΓ(1+δ))+(2+f2(ς)IδΓ(1+δ))(f2(ς)IδΓ(1+δ))]+2[(2+f2(ς)IδΓ(1+δ))(f2(ς)IδΓ(1+δ))+(f2(ς)IδΓ(1+δ))(2+f2(ς)IδΓ(1+δ))],(45)

put DδIResy2(ς,0)=0 in Eq. 45, we get

f2(ς)=8ς.

Third approximation

Put k = 3 in Eq. 39, we get

y3(ς,I)=f0(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

where f(ς) = ς, f1(ς) = −2ς and f2(ς) = −8ς

y3(ς,I)=ς2ςIδΓ(1+δ)8ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

put k = 2 in Eq. 40, we get

Resy3(ς,I)=δy3Iδ+y23ς+(3y3ς3)2,
Resy3(ς,I)={(2ς8ςIδΓ(1+δ)+f3(ς)I2δΓ(1+2δ))+2[(ς2ςIδΓ(1+δ)8ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(12IδΓ(1+δ)8I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))]+2[(ς2ςIδΓ(1+δ)8ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(f3(ς)I3δΓ(1+3δ))(12IδΓ(1+δ)8I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(f3(ς)I3δΓ(1+3δ))(12IδΓ(1+δ)8I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(f3(ς)I3δΓ(1+3δ))+(f3(ς)I3δΓ(1+3δ))(f3(ς)I3δΓ(1+3δ))],(46)

put k = 3 in Eq. 44, we get

D2δIResy3(ς,I)=0,

applying D2δI on both sides of the Eq. 46, we have

D2δIResy3(ς,I)=f3(ς)+2[(8ς+f3(ς)IδΓ(1+δ))(8+f3(ς)IδΓ(1+δ))]+2[(8ς+f3(ς)IδΓ(1+δ))(f3(ς)IδΓ(1+δ))×(8+f3(ς)IδΓ(1+δ))(f3(ς)IδΓ(1+δ))(8+f3(ς)IδΓ(1+δ))(f3(ς)IδΓ(1+δ))+(f3(ς)IδΓ(1+δ))(f3(ς)IδΓ(1+δ))],(47)

put D2δIResy3(ς,0)=0 in Eq. 47, we get

f3(ς)=128ς.r

The RPSM solution of Eq. 37, is given as

y(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ)+,
y(ς,I)=ς2ςIδΓ(1+δ)8ςI2δΓ(1+2δ)128ςI3δΓ(1+3δ)+.

4.2.2 q-HATM Solution

First Approximation.

Taking LT of Eq. 37, and simplifying

sδL[y(ς,I)]n1k=0sδk1yk(ς,0)+L(y2ς+3y2ς3)=0,
L[y(ς,I)]1sδsδ1y0(ς,0)+1sδL(y2ς+3y2ς3)=0,
L[y(ς,I)]ςs+1sδL(y2ς+3y2ς3)=0.

N is the nonlinear term and is defined as

N[θ(ς,I;q)]=L[θ(ς,I;q)]ςs+1sδL(y2ς+3y2ς3).

Using the procedure of q-HATM

ym(ς,I)=kmym1(ς,I)+hL1[Rm(ym1)],(48)

for m = 1 Eq. 48, become

y1(ς,I)=k1y0(ς,I)+hL1[R1(y0)],(49)
Rm(ym1)=L(ym1)(1kmn)ςs+1sδL(y2m1ς+3y2m1ς3),(50)

for m = 1 Eq. 50, become

R1(y0)=L(y0)(1k1n)ςs+1sδL(y20ς+3y20ς3),
=2ςsδ+1.

Put in Eq. 49, we get

y1(ς,I)=hL1[2ςsδ+1],
y1(ς,I)=2hςIδΓ(1+δ).

Second Approximation

Put m = 2 in Eq. 48, we obtain

y2(ς,I)=k2y1(ς,I)+hL1[R2(y1)],(51)

set m = 2 in Eq. 50, we have

R2(y1)=L(y1)(1k2n)ςs+1sδL(y21ς+3y21ς3),
=2hςs1+δ+8h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2.

Put in Eq. 51, we get

y2(ς,I)=2nhςIδΓ(1+δ)+hL1[2hςsδ+1+8h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2],
y2(ς,I)=2nhςIδΓ(1+δ)+2h2ςIδΓ(1+δ)+8h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2.

Third Approximationfor m = 3 Eq. 48, become as

y3(ς,I)=k3y2(ς,I)+hL1[R3(y2)],(52)

as for m = 3 Eq. 50, become as

R3(y2)=L(y2)(1k3n)ςs+1sδL(y22ς+3y22ς3),
R3(y2)={2nhςsδ+1+2h2ςsδ+1+8h3ς(Γ(2δ+1))(Γ(3δ+1))s3δ+1(Γ(1+δ))2+2[(2nhςs2δ+1+2h2ςs2δ+1+8h3ς(Γ(2δ+1))(Γ(3δ+1))s4δ+1(Γ(1+δ))2)(2nhs2δ+1+2h2s2δ+1+8h3(Γ(2δ+1))(Γ3δ+1)s4δ+1(Γ(1+δ))2)],

put in Eq. 52, and simplifying

y3(ς,I)={2n2hςIδΓ(1+δ)+2nh2ςIδΓ(1+δ)+8nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+2nh2ςIδΓ(δ+1)+2h3ςIδΓ(δ+1)+8h4ςI3δ(Γ(2δ+1))(Γ(1+δ))2+2[(2nh2ςI2δΓ(2δ+1)+2h3ςI2δΓ(2δ+1)+8h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)(2nh2I2δΓ(2δ+1)+2h3I2δΓ(2δ+1)+8h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

The q-HATM solution of Eq. 37 is given as

y(ς,I)=y0(ς,I)+y1(ς,I)+y2(ς,I)+y3(ς,I),
y(ς,I)=ς+2hςIδΓ(1+δ)+2nhςIδΓ(1+δ)+2h2ςIδΓ(1+δ)+8h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+2n2hςIδΓ(1+δ)+2nh2ςIδΓ(1+δ)+8nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+2nh2ςIδΓ(δ+1)+2h3ςIδΓ(δ+1)+8h4ςI3δ(Γ(2δ+1))(Γ(1+δ))2×2[(2nh2ςI2δΓ(2δ+1)+2h3ςI2δΓ(2δ+1)+8h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)×(2nh2I2δΓ(2δ+1)+2h3I2δΓ(2δ+1)+8h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

4.3 Example

The fractional order KDV equation of the form [68].

δyIδ+12y2ς3yς3=0,0<δ1,(53)

the initial condition of Eq. 53, is

y(ς,0)=ς.

The exact solution of the Eq. 53, is

y(ς,I)=ς1+I.

4.3.1 RPSM-Solution

First Approximation.

The Kth truncated series of the solution of Eq. 53, using RPSM we get

yk(ς,I)=kn=0fn(ς)InδΓ(1+nδ),(54)

the zeroth RPSM approximate solution of Eq. 53, is

y0(ς,I)=y(ς,0)=f(ς),

so the Eq. 54, should be written as

yk(ς,I)=f(ς)+kn=1fn(ς)InδΓ(1+nδ),k=1,2,(55)

put k = 1 in Eq. 55, we have

y1(ς,I)=f(ς)+f1(ς)IδΓ(1+δ),

where y (ς, 0) = f(ς) = ς,

y1(ς,I)=ς+f1(ς)IδΓ(1+δ),

the residual function of Eq. 53, is given by

Resy(ς,I)=δyIδ+12y2ς3yς3,

the Kth residual function Resy(ς,I), is given by

Resyk(ς,I)=δykIδ+12y2kς3ykς3,(56)

put k = 1 in the Eq. 56 we get

Resy1(ς,I)=δy1Iδ+12y21ς3y1ς3,
Resy1(ς,I)=f1(ς)+(ς+f1(ς)IδΓ(1+δ))(1+f1(ς)IδΓ(1+δ))f1(ς)IδΓ(1+δ),(57)

we know that

Resy1(ς,0)=0,

put in Eq. 57, we get

f1(ς)=ς.

Second approximation

Put k = 2 in Eq. 55, we get

y2(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

where f(ς) = ς, and f1(ς) = −ς

=ςςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ),

put k = 2 in Eq. 56, we get

Resy2(ς,I)=δy2Iδ+12y22ς3y2ς3,
Resy2(ς,I)=(ς+f2(ς)IδΓ(1+δ))+(ςςIδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))(1IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ))f2(ς)I2δΓ(1+2δ),(58)

we know that

D(k1)δIResyk(ς,I)=0,(59)

put k = 2 in Eq. 59, we get

DδIResy2(ς,I)=0,

applying DδI on both sides of the Eq. 58, we have

DδIResy2(ς,I)=f2(ς)+(ς+f2(ς)IδΓ(1+δ))(1+f2(ς)IδΓ(1+δ))+f2(ς)IδΓ(1+δ),(60)

put DδIResy2(ς,0)=0 in Eq. 60, we get

f2(ς)=ς.

Third approximation

Put k = 3 in Eq. 55 we get

y3(ς,I)=f0(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

where f(ς) = ς, f1(ς) = −ς and f2(ς) = −ς

y3(ς,I)=ςςIδΓ(1+δ)ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ),

put k = 2 in Eq. 56, we get

Resy3(ς,I)=δy3Iδ+12y23ς3y3ς3,Resy3(ς,I={(ςςIδΓ(1+δ)+f3(ς)I2δΓ(1+2δ))+[(ςςIδΓ(1+δ)ςI2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))(1IδΓ(1+δ)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ))]+f3(ς)I3δΓ(1+3δ),(61)

put k = 3 in Eq. 59, we get

D2δIResy3(ς,I)=0,

applying D2δI on both sides of the Eq. 61, we have

D2δIResy3(ς,I)=f3(ς)+[(ς+f3(ς)IδΓ(1+δ))(1+f3(ς)IδΓ(1+δ))]+f3(ς)IδΓ(1+δ),(62)

put D2δIResy3(ς,0)=0 in Eq. 62, we get

f3(ς)=ς.

put k = 2 in Eq. 56, we get

The RPSM solution of Eq. 53, is given as

y(ς,I)=f(ς)+f1(ς)IδΓ(1+δ)+f2(ς)I2δΓ(1+2δ)+f3(ς)I3δΓ(1+3δ)+,
y(ς,I)=ςςIδΓ(1+δ)ςI2δΓ(1+2δ)ςI3δΓ(1+3δ)+.

4.3.2 q-HATM Solution

First Approximation.

Taking LT of Eq. 53, and simplifying

sδL[y(ς,I)]n1k=0sδk1yk(ς,0)+L(12y2ς3yς3)=0,
L[y(ς,I)]1sδsδ1y0(ς,0)+1sδL(12y2ς3yς3)=0,
L[y(ς,I)]ςs1sδL(3y2ς3yς3)=0.

The nonlinear term N is defined as

N[θ(ς,I;q)]=L[θ(ς,I;q)]ςs+1sδL(12y2ς3yς3).

Using the procedure of q-HATM

ym(ς,I)=kmym1(ς,I)+hL1[Rm(ym1)],(63)

put m = 1 in the Eq. 63, we get

y1(ς,I)=k1y0(ς,I)+hL1[R1(y0)],(64)
Rm(ym1)=L(ym1)(1kmn)ςs+1sδL(12y2m1ς3ym1ς3),(65)

put m = 1 in Eq. 65, we get

R1(y0)=L(y0)(1k1n)ςs+1sδL(12y20ς3y0ς3),
=ςsδ+1,

put in Eq. 64, we get

y1(ς,I)=hL1[ςsδ+1]=hςIδΓ(1+δ).

Second Approximation

Put m = 2 in the Eq. 63, we get

y2(ς,I)=k2y1(ς,I)+hL1[R2(y1)],(66)

Put m = 2 in the Eq. 65, we get

R2(y1)=L(y1)(1k2n)ςs+1sδL(12y21ς3y1ς3)=hςs1+δ+h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2,

put in Eq. 66, we get

y2(ς,I)=nhςIδΓ(1+δ)+hL1[hςsδ+1+h2ς(Γ(2δ+1))s3δ+1(Γ(1+δ))2],
y2(ς,I)=nhςIδΓ(1+δ)+h2ςIδΓ(1+δ)+h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2.

Third Approximation

Put m = 3 in the Eq. 63, we get

y3(ς,I)=k3y2(ς,I)+hL1[R3(y2)],(67)

put m = 3 in the Eq. 65, we get

R3(y2)=L(y2)(1k3n)ςs+1sδL(12y22ς3y2ς3),
=nhςsδ+1+h2ςsδ+1+h3ς(Γ(2δ+1))(Γ(3δ+1))s3δ+1(Γ(1+δ))2+[(nhςs2δ+1+h2ςs2δ+1+h3ς(Γ(2δ+1))(Γ(3δ+1))s4δ+1(Γ(1+δ))2)(nhs2δ+1+h2s2δ+1+h3(Γ(2δ+1))(Γ3δ+1)s4δ+1(Γ(1+δ))2)],

put in Eq. 67, and simplifying

y3(ς,I)=n2hςIδΓ(1+δ)+nh2ςIδΓ(1+δ)+nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+nh2ςIδΓ(δ+1)+h3ςIδΓ(δ+1)+h4ςI3δ(Γ(2δ+1))(Γ(1+δ))2+[(nh2ςI2δΓ(2δ+1)+h3ςI2δΓ(2δ+1)+h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)(nh2I2δΓ(2δ+1)+h3I2δΓ(2δ+1)+h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

The q-HATM solution of Eq. 53, is given as

y(ς,I)=y0(ς,I)+y1(ς,I)+y2(ς,I)+y3(ς,I),
y(ς,I)=ς+hςIδΓ(1+δ)+nhςIδΓ(1+δ)+h2ςIδΓ(1+δ)+h3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+n2hςIδΓ(1+δ)+nh2ςIδΓ(1+δ)+nh3ςI3δ(Γ(2δ+1))Γ(3δ+1)(Γ(1+δ))2+nh2ςIδΓ(δ+1)+h3ςIδΓ(δ+1)+h4ςI3δ(Γ(2δ+1))(Γ(1+δ))2[(nh2ςI2δΓ(2δ+1)+h3ςI2δΓ(2δ+1)+h4ςI4δ(Γ(2δ+1))(Γ(3δ+1))Γ(4δ+1)(Γ(1+δ))2)(nh2I2δΓ(2δ+1)+h3I2δΓ(2δ+1)+h4I4δ(Γ(2δ+1))(Γ3δ+1)Γ(4δ+1)(Γ(1+δ))2)].

5 Results and Discussions

Figures 1-6 are the 2D and 3D comparison plots of RPSM, q-HATM, and Exact-solutions of Example 4.1, 4.2, and 4.3 respectively for fractional-order δ = 1. Figures 7-9 are the 3D comparison of q-HATM and RPSM-solutions at fractional-order δ = 0.9, 1 for Example 4.1, 4.2, and 4.3 respectively. Tables 13 are the absolute error comparison of q-HATM and RPSM solutions for Example 4.1, 4.2, and 4.3 respectively. In the above Figures and tables, it is observed that the q-HATM, RPSM and exact solutions are in closed contact with each other at integer-order derivatives of each problem. The fractional order solutions are compared of the proposed techniques and provide the excellent agreement in their solutions by using q-HATM and RPSM techniques. It is analyzed through graphs and tables that the fractional solutions are convergent towards integer order solutions.

FIGURE 1
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FIGURE 1. 3D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.1.

FIGURE 2
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FIGURE 2. 2D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.1.

FIGURE 3
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FIGURE 3. 3D plots of (A) RPSM (B) q-HATM-solutions at δ = 1, 0.9 of Example 4.1.

FIGURE 4
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FIGURE 4. 3D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.2.

FIGURE 5
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FIGURE 5. 2D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.2.

FIGURE 6
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FIGURE 6. The 3D plots of (A) RPSM and (B) q-HATM solutions of example 4.2 at δ = 1 and δ = 0.9.

FIGURE 7
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FIGURE 7. 3D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.3.

FIGURE 8
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FIGURE 8. 2D plots of (A) RPSM (B) Exact (C) q-HATM-solutions at δ = 1 of Example 4.3.

FIGURE 9
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FIGURE 9. 3D plots of (A) RPSM (B) q-HATM-solutions at δ = 1, 0.9 of Example 4.3.

TABLE 1
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TABLE 1. A comparison of RPSM, q-HATM and exact for various values of ς and I.

TABLE 2
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TABLE 2. A comparison of RPSM, q-HATM and exact for various values of ς and I.

TABLE 3
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TABLE 3. A comparison of RPSM, q-HATM and exact for various values of ς and I.

6 Conclusion

In this paper, the solutions of various non-linear fractional KdV equations are presented using two innovative techniques. RPSM and q-HATM are the most simple and straightforward procedures which can be used effectively for the solutions FPDEs and their systems. The obtained solutions, using the proposed techniques are displayed through graphs and tables. The solutions comparison has shown a very close contact between the exact, RPSM and q-HATM solutions of the targeted problems. The fractional-order solutions of higher interest and provide the useful information about the dynamics of the targeted problems. The fractional solutions are found convergent towards the actual solution of the targeted problems. The present work fully supports the actual dynamics of the physical phenomena and can be extended for the solutions of other complex and non-linear FPDEs and their systems.

Data Availability Statement

The original contributions presented in the study are included in the article/supplementary material, further inquiries can be directed to the corresponding author.

Author Contributions

HK (Supervision), QK (Methodology), FT (Project administrator), PK (Funding, Draft Writing), GS (Investigation), IU (Methodology), KS (Funding, Draft Writing), FT (Draft writing, visualization).

Funding

The authors acknowledge the financial support provided by the Center of Excellence in Theoretical and Computational Science (TaCS-CoE), KMUTT. This research project is supported by Thailand Science Research and Innovation (TSRI) Basic Research Fund: Fiscal year 2022 under project number FRB650048/0164. Researchers Supporting Project number (RSP2022R440), King Saud University, Riyadh, Saudi Arabia.

Conflict of Interest

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Publisher’s Note

All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.

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Keywords: fractional calculus, Laplace transform, Laplace residual power series method, fractional partial differential equation, power series, q-homotopy analysis transform method

Citation: Khan H, Khan Q, Tchier F, Singh G, Kumam P, Ullah I, Sitthithakerngkiet K and Tawfiq F (2022) The Efficient Techniques for Non-Linear Fractional View Analysis of the KdV Equation. Front. Phys. 10:924310. doi: 10.3389/fphy.2022.924310

Received: 20 April 2022; Accepted: 13 June 2022;
Published: 25 July 2022.

Edited by:

Wenjun Liu, Nanjing University of Information Science and Technology, China

Reviewed by:

Mahmoud Abdel-Aty, Sohag University, Egypt
Khaled M. Saad, Najran University, Saudi Arabia

Copyright © 2022 Khan, Khan, Tchier, Singh, Kumam, Ullah, Sitthithakerngkiet and Tawfiq. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

*Correspondence: Poom Kumam, poom.kum@kmutt.ac.th

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