Integro differential equation calculator

This paper discusses qualitative properties of solutions of certain unperturbed and perturbed systems of nonlinear integro-delay differential equations (IDDEs), namely asymptotic stability, uniform stability, integrability and boundedness. Here, four new theorems are proved on these properties of solutions by using Lyapunov–Krasovskiǐ ...

Integro differential equation calculator. By means of the recent $$\\psi $$ ψ -Hilfer fractional derivative and of the Banach fixed-point theorem, we investigate stabilities of Ulam–Hyers, Ulam–Hyers–Rassias and semi-Ulam–Hyers–Rassias on closed intervals [a, b] and $$[a,\\infty )$$ [ a , ∞ ) for a particular class of fractional integro-differential equations.

In this work, our aim is to solve a general form of nonlinear Volterra-Fredholm integro-differential equations using four approximate methods, namely, Adomian …

5. RUSANOV, V. V., Difference schemes of the third order of accuracy for the continuous calculation of difference solutions. DokL Akad. Nauk SSSR, 180,6, 1303-1305, 1968. SOLUTION OF A NON-LINEAR INTEGRO-DIFFERENTIAL EQUATION* B. A. VELIKSON Leningrad (Received1 July 1973) AN EXACT solution of a non-linear integro …Mar 2, 2015 · Physically it describes diffusion in a cylinder. A necessary condition can be obtained by differentiating the equation with respect to u. The resulting equation for q = D[p,u] is solved by Mathematica exactly in terms of Bessel functions. Derivation. The integral differential equation in Mathematica terms is (pap is pa'(t)) The solution detailed below is : With F(s) = F ( s) = Laplace transform of f(x) f ( x). Φ(s, t) =e−λt s F(s) Φ ( s, t) = e − λ t s F ( s) u(x, t) = Inverse Laplace Transform of Φ(s, t) u ( x, t) = Inverse Laplace Transform of Φ ( s, t) The result cannot be expressed more explicitly until the function f(x) f ( x) be explicitly given.Solve the given integral equation or integro-differential equation for y(t). t y'v -8e2(t-wy(v) dv = 21, y(0)=2 0 y(t) =D This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.Solve a Volterra integral equation using DSolveValue. In[1]:= eqn = y[x] == x^3 + \[Lambda] \!\( \*SubsuperscriptBox[\(\[Integral]\), \(0\), \(x\)]\(\((t - \ x)\) y[ t] \[DifferentialD]t\)\);Solution of an integro-differential equation arising in oscillating magnetic fields using He’s homotopy perturbation method. Prog. Electromagnetics Res. PIER, 78 ... Approximate calculation of eigenvalues with the method of weighted residuals–collocation method. Appl. Math. Comput., 160 (2005), pp. 401-410.The Laplace equation is a second-order partial differential equation that describes the distribution of a scalar quantity in a two-dimensional or three-dimensional space. The Laplace equation is given by: ∇^2u(x,y,z) = 0, where u(x,y,z) is the scalar function and ∇^2 is the Laplace operator.Volterra Integral Equations Solver. Version 1.2.0.0 (2.07 KB) by Ankit Digarsey. Analytical Solutions of Volterra Integral Equations. Follow. 4.0. (2) 973 Downloads. Updated 19 Feb 2015. Share.

Solve the given integral equation or integro-differential equation for y(t). t y'v -8e2(t-wy(v) dv = 21, y(0)=2 0 y(t) =D This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. In this work, we consider a Volterra integro-differential equation involving Caputo fractional derivative of order $$ \alpha \in (0,1). $$ To approximate the solution, we propose two finite difference schemes that use L1 and L1-2 discretization to approximate the differential part and a composite trapezoidal rule to approximate an integral part.This paper discusses qualitative properties of solutions of certain unperturbed and perturbed systems of nonlinear integro-delay differential equations (IDDEs), namely asymptotic stability, uniform stability, integrability and boundedness. Here, four new theorems are proved on these properties of solutions by using Lyapunov–Krasovskiǐ ...Nov 19, 2020 · A general purpose numeric integro-differential equation (IDE) solver, based on an iterative scheme devised by Gelmi and Jorquera . IDEs appear in many contexts, particularly when trying to describe a system whose current behavior depends on its own history. IDESolver provides a simple interface for solving these kinds of equations in Python. The maximum height of a projectile is calculated with the equation h = vy^2/2g, where g is the gravitational acceleration on Earth, 9.81 meters per second, h is the maximum height ...This concept can be used not only to calculate bankruptcy in its entirety, but also can be used to predict the loss of an insurance program at a certain time. The value of the probability function of bankruptcy risk is determined by using a mathematical model developed based on the concept of integro-differential equations, which is used as a …Free separable differential equations calculator - solve separable differential equations step-by-stepNeural Integro-Differential Equations. Modeling continuous dynamical systems from discretely sampled observations is a fundamental problem in data science. Often, such dynamics are the result of non-local processes that present an integral over time. As such, these systems are modeled with Integro-Differential Equations (IDEs); generalizations ...

N. Heymans and J.C. Bauwens, Fractal rheological models and fractional differential equations for viscoelastic behavior. Rheol. Acta 33 (1994), 210–219. Article Google Scholar Y. Liu, Boundary value problems of singular multi-term fractional differential equations with impulse effects. Math.Volterra Integral Equations Solver. Version 1.2.0.0 (2.07 KB) by Ankit Digarsey. Analytical Solutions of Volterra Integral Equations. Follow. 4.0. (2) 973 Downloads. Updated 19 Feb 2015. Share.We just mention a few part among them. A. Pani and G. Fairweather [26] formulated an ADI OSC method to the partial integro-differential equations with a positive-type memory term. A. Pani and G. Fairweather [19] also considered a class of the partial integro-differential equations of parabolic type with the OSC methods in space …A general purpose numeric integro-differential equation (IDE) solver, based on an iterative scheme devised by Gelmi and Jorquera. IDEs appear in many contexts, particularly when trying to describe a system whose current behavior depends on its own history. IDESolver provides a simple interface for solving these kinds of equations in Python.Calculate the integral and derivative of an equation online for free. Calculate the integral and derivative of an equation online for free. Toggle navigation. Expert Math Tutoring. Home ... Integral & Differential Calculator. Integrate; Differentiate; Enter a function To Integrate (e.g. sin(x)^3 ): With Respect to (e.g. x):Completing the square method is a technique for find the solutions of a quadratic equation of the form ax^2 + bx + c = 0. This method involves completing the square of the quadratic expression to the form (x + d)^2 = e, where d and e are constants.

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In Section 2, we recall basic properties of positive def- ite kernels as well as the definition of the resolvent for the linear equation associated with (1.1). ction 3 is devoted to the well-posedness of (1.1) and Section 4 to exponential decay. In Section 5, e compare our results with those obtained in [1] and [30] and discuss several examples ...It can handle a wide range of ordinary differential equations (ODEs) as well as some partial differential equations (PDEs). In a system of ordinary differential equations there can be any number of unknown functions u_i, but all of these functions must depend on a single "independent variable" t, which is the same for each function.This paper presents a new technique for solving linear Volterra integro-differential equations with boundary conditions. The method is based on the blending of the Chebyshev spectral methods. The application of the proposed method leads the Volterra integro-differential equation to a system of algebraic equations that are easy …Solution of the nonlinear fractional integro-differential equation. Consider the nonlinear Fredholm fractional integro-differential equation of the second kind given by Eq. (1). If we approximate the function g(x) with the second kind Chebyshev wavelet, it can be writen as (32) g (x) ≈ G T Ψ (x). Let (33) D α f (x) ≈ C T Ψ (x).Calculus and Analysis. Differential Equations. Integral Equations. An integral equation of the form f (x)=int_a^xK (x,t)phi (t)dt, where K (x,t) is the integral kernel, f (x) is a specified function, and phi (t) is the function to be solved for.Then I want to solve the integro-differential equation given. The functional dependence may be very messy, so solving it with the Laplace-transform is not my first choice (I would need the inverse Laplace-transform at some point, and that may be difficult because of many roots of the function).

In this paper, we investigate two types of problems (the initial-value problem and nonlocal Cauchy problem) for fractional differential equations involving ψ-Hilfer derivative in multivariable case (ψ-m-Hilfer derivative). First we propose and discuss ψ-fractional integral, ψ-fractional derivative and ψ-Hilfer type fractional derivative of a …In this work, a new technique has been presented to find approximate solution of linear integro-differential equations. The method is based on modified orthonormal Bernoulli polynomials and an operational matrix thereof. The method converts a given integro-differential equation into a set of algebraic equations with unknown …Tutorial: How to solve complex Integro-Differential equationsCheck out more IIT JEE Integrals: https://www.youtube.com/playlist?list=PLzzqBYg7CbNqi-np1YDPBAg...Question: In Problems 15–22, solve the given integral equation or integro-differential equation for y(t). y(v) – ) = 15. y(e) +3 [">(u)sin(1–v) dv = 1 16. y(t ...Entrepreneurship is a mindset, and nonprofit founders need to join the club. Are you an entrepreneur if you launch a nonprofit? When I ask my peers to give me the most notable exam...Calculus Calculator. Differential Equation Calculator. Solve differential equations. The calculator will try to find the solution of the given ODE: first-order, second-order, nth …Are you tired of spending hours trying to solve complex equations manually? Look no further. The HP 50g calculator is here to make your life easier with its powerful Equation Libra...5. RUSANOV, V. V., Difference schemes of the third order of accuracy for the continuous calculation of difference solutions. DokL Akad. Nauk SSSR, 180,6, 1303-1305, 1968. SOLUTION OF A NON-LINEAR INTEGRO-DIFFERENTIAL EQUATION* B. A. VELIKSON Leningrad (Received1 July 1973) AN EXACT solution of a non-linear integro …PDF | On Feb 17, 2016, Ugochukwu Odunukwe published Integro differential equation | Find, read and cite all the research you need on ResearchGate

We often want to calculate the inner products of functions and hybrid Legandre and Block–Pulse functions when we use Galerkin methods for linear integro-differential equation system. Sweldens et al. [6] obtained a quadrature formulae for wavelet we give a method of construction of quadrature formulae for the calculation of …

This integro-differential equation can be solved with the method mentioned in this answer i.e. differentiate the equation to make it a pure ODE. First, interprete the equations to Mathematica code. (BTW, if you had given the Mathematica code form of the equation in your question, your question would have attracted more attention.Learn more about integro differential equations, ordinary differential equations MATLAB. ... using one of the ODE solver from the MATLAB ODE suite, e.g. ODE15S,ODE45.Delayed differential equations form an important class of evolution equations and constitute a crucial field of study for the modeling of hereditary phenomena encountered in physics, biology, chemistry, economics, ecology, etc. The study of these equations by semigroup approach has been the subject of many publications, for …28617. An integro-differential equation is a mathematical expression which contains derivatives of the required function and its integral transforms. Such equations are typical of those processes where a quantity of interest (a required function) at each point is not unambiguously determined by its value near the point—as on processes ...Nov 1, 2008 · The solution of integral and integro-differential equations have a major role in the fields of science and engineering. When a physical system is modeled under the differential sense; it finally gives a differential equation, an integral equation or an integro-differential equation. Solve the given integral equation or integro-differential equation for y(t). t y'v -8e2(t-wy(v) dv = 21, y(0)=2 0 y(t) =D This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts.Calc. appl. Anal. 19, 290 – 318 ... uniqueness and controllability results for fractional impulsive neutral functional integro-differential evolution equation in Banach spaces. The main techniques depend on the fractional calculus properties of characteristic solution operators and sectorial operators.This concept can be used not only to calculate bankruptcy in its entirety, but also can be used to predict the loss of an insurance program at a certain time. The value of the probability function of bankruptcy risk is determined by using a mathematical model developed based on the concept of integro-differential equations, which is used as a …IDESolver provides a general-purpose numerical integro-diferential equation (IDE) solver based on an iterative algorithm devised by Gelmi and Jorquera (Gelmi and Jorquera 2014). IDEs appear in many contexts, particularly when trying to describe a system whose current behavior depends on its own history. A common example is in electronics, where ...Integral and integro-differential equations of positive integer order have wide applications in numerous scientific areas, see Agarwal et al. (), Andreev and Peregudova (), Bohner and Tunç (), Burton (), Hale and Verduyn Lunel (), Rahman (), Wazwaz ().There are several well-known methods in the literature to discuss various …

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Solve an integro-differential equation. In[1]:= eqn = Derivative[1][y][x] == 1 + Sin[a x] + \!\( \*SubsuperscriptBox[\(\[Integral]\), \(0\), \(x\)]\(y[ t] \[DifferentialD]t\)\);This work investigates several discretizations of the Erdélyi-Kober fractional operator and their use in integro-differential equations. ... Invariant subspace method and exact solutions of certain nonlinear time fractional partial differential equations. Fractional Calc. Appl. Anal. 18(1), 146–162 (2015)This manuscript investigates a constrained problem of an arbitrary (fractional) order quadratic functional integro-differential equation with a quadratic functional integro-differential constraint. We demonstrate that there is at least one solution x∈C[0,T] to the problem. Moreover, we outline the necessary demands for the solution’s …This explains why partial integro-differential equations in particular are attracting more attention in the field of applied mathematics. Over the last few decades, we have witnessed the use of fractional calculus techniques in the modeling of processes studied in various fields, including computer science, physics, neuroscience, biology, …Scientists have come up with a new formula to describe the shape of every egg in the world, which will have applications in fields from art and technology to architecture and agric...Calculating Your Net Worth - Calculating your net worth is done using a simple formula. Read this page to see exactly how to calculate your net worth. Advertisement Now that you've... particular solution u(x) of equation (6.1). Any Fredholm integro-differential equation is characterized by the existence of one or more of the derivatives u (x), u (x),...outside the integral sign. The Fredholm integro-differential equations of the second kind appearin a varietyof scientific applications such satisfies a trace regularity result. Milla Miranda and Medeiros [] enlarged the class of nonlinear terms by means of approximation arguments.However they do not consider memory terms in the equation, that is \(\dot{a}\equiv 0\).To our knowledge it seems that there are not previous papers studying the hidden regularity for solutions of …About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...The goal of this paper is to contribute a firm and outstanding program to nonlinear fractional Volterra integro-differential equations with the initial value problem on the basis of the reproducing kernel method (RKM). To a certain extent, the difficulty of preserving memory of fractional differential operators is reduced. At the beginning, the … ….

Any Fredholm integro-differential equation is characterized by the existence of one or more of the derivatives u′, (x), u″ (x), outside the integral sign. The Fredholm integro … Volterra-Fredholm integral and integro-differential equations which is a simple and powerful method for solving a wide class of nonlinear problems [24]. The Taylor polynomial solution of integro-differential equations has been studied in [28]. The use of Lagrange interpolation in solving integro-differential equations was investigated by ... In this paper, we use operational matrices of piecewise constant orthogonal functions on the interval [0, 1) to solve Volterra integral and integro-differential equations of convolution type without solving any system. We first obtain Laplace transform of the problem and then we find numerical inversion of Laplace …These are applied to two integro-differential equations, a model of neuronal transmission [5] and a model of traveling dispersive corner waves [6]. The remainder of the paper is devoted to the transformation of differential operators into equivalent integral operators, and realizing those operators as code in the chebfun …In this paper, a nonlinear Volterra integro-differential equation with Caputo fractional derivative, multiple kernels, and multiple constant delays is considered. The aim of this paper is to investigate qualitative properties of solutions of this equation such as uniform stability, asymptotic stability, and Mittag-Leffler stability of the zero solution as well as boundedness of nonzero ...IDESolver: a general purpose integro-differential equation solver. Python Submitted 15 January 2018 • Published 31 January 2018.Calc. appl. Anal. 19, 290 – 318 ... uniqueness and controllability results for fractional impulsive neutral functional integro-differential evolution equation in Banach spaces. The main techniques depend on the fractional calculus properties of characteristic solution operators and sectorial operators.We investigate the existence of nonnegative solutions for a fractional integro-differential equation subject to multi-point boundary conditions, ... Tudorache, A.: On a system of fractional differential equations with coupled integral boundary conditions. Fract. Calc. Appl. Anal. 18(2), 361–386 (2015) Integro differential equation calculator, We develop the first algorithm for computing rational solutions of scalar integro-differential equations with polynomial coefficients. It starts by finding the possible poles of a rational solution. Then, bounding the order of each pole and solving an algebraic linear system, we compute the singular part of rational solutions at each possible pole., The aim of this work is to develop a localization technique and to establish a regularity result for non-local integro-differential operators $${\\fancyscript{L}}$$ of order $${\\alpha\\in (0,2)}$$ . Thereby we extend the De Giorgi–Nash–Moser theory to non-local integro-differential operators. The operators $${\\fancyscript{L}}$$ under consideration …, Mar 28, 2015 · Hi, I am interested in writing a code which gives a numerical solution to an integro-differential equation. First off I am very new to integro-differential equations and do not quite understand them so I decided to start simple and would like some help with the first steps. My proposed equation is in the attached picture and the formulas I wish ... , TOPICS. Algebra Applied Mathematics Calculus and Analysis Discrete Mathematics Foundations of Mathematics Geometry History and Terminology Number Theory Probability and Statistics Recreational Mathematics Topology Alphabetical Index New in MathWorld, 1.1 Introduction. Two methods exist for simulating and modeling neutron transport and interactions in the reactor core, or “neutronics.”. Deterministic methods solve the Boltzmann transport equation in a numerically approximated manner everywhere throughout a modeled system. Monte Carlo methods model the nuclear system (almost) exactly and ..., Based on the reduced integro-differential equation, a new one-step parameter estimation approach, ... By employing the INGBM model, we calculate three-step ahead forecasting results of municipal sewage discharge and water consumption as {118.01, 121.38, 124.85} and {1115.4, 1100.2, ..., We investigate an integro-differential equation for a disease spread by the dispersal of infectious individuals and compare this to Mollison's [Adv. Appl. Probab. 4 (1972) 233; D. Mollison, The rate of spatial propagation of simple epidemics, in: Proc. 6th Berkeley Symp. on Math. Statist. and Prob., …, More than just an online integral solver. Wolfram|Alpha is a great tool for calculating antiderivatives and definite integrals, double and triple integrals, and improper integrals. The Wolfram|Alpha Integral …, Volterra Integral Equations Solver. Version 1.2.0.0 (2.07 KB) by Ankit Digarsey. Analytical Solutions of Volterra Integral Equations. Follow. 4.0. (2) 973 Downloads. Updated 19 Feb 2015. Share., I have a problem which I will try to describe in details. Please try to help me, because the exam is coming :) The task is to find the solution of the differential equation as follows: Theme. Copy. A*d2v/dt2+B*dv/dt+C*v-P (t)=0. P (t)=integral (fun (t,z)dz) So I have the integral function implemented into the diff equation, where the ..., solving differential equations with laplace transform. Have a question about using Wolfram|Alpha? Contact Pro Premium Expert Support ». Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals. For math, science, nutrition, history, geography, engineering, mathematics ..., Nov 19, 2020 · A general purpose numeric integro-differential equation (IDE) solver, based on an iterative scheme devised by Gelmi and Jorquera . IDEs appear in many contexts, particularly when trying to describe a system whose current behavior depends on its own history. IDESolver provides a simple interface for solving these kinds of equations in Python. , The term “differential pressure” refers to fluid force per unit, measured in pounds per square inch (PSI) or a similar unit subtracted from a higher level of force per unit. This c..., Question: In Problems 15–22, solve the given integral equation or integro-differential equation for y(t). y(v) – ) = 15. y(e) +3 [">(u)sin(1–v) dv = 1 16. y(t ... , In this paper, we solve n th-order integro-differential equations by changing the problem to a system of ordinary integro-differential equations and using the variational iteration method. The variational iteration formula is derived and the Lagrange multiplier can be effectively identified. It is well known that one of the advantages of He’s …, We also introduce a method known as LD–PA method to solve an integro-differential equation. The numerical study presented in Section 3 showed that all the methods give a highly accurate results for a given equation. However, the WGM has a complicated computational calculus and it is not easy to perform the calculation involved., Solve an Integro-Differential Equation. Solve the Tautochrone Problem. Solve an Initial Value Problem Using a Green's Function., In this paper, the problem of approximate controllability for non-linear impulsive fractional integro-differential equation with state-dependent delay in Hilbert spaces is investigated. We study the approximate controllability for non-linear impulsive integro-differential systems under the assumption that the corresponding linear control …, Free IVP using Laplace ODE Calculator - solve ODE IVP's with Laplace Transforms step by step ... Advanced Math Solutions – Ordinary Differential Equations Calculator, In this paper, a Jacobi-collocation spectral method is developed for a Volterraintegro-differential equation with delay, which contains a weakly singular kernel. We use a function transformation and a variable transformation to change the equation into a new Volterra integral equation defined on the standard interval [−1, 1], so that the …, A general purpose numeric integro-differential equation (IDE) solver, based on an iterative scheme devised by Gelmi and Jorquera. IDEs appear in many contexts, particularly when trying to describe a system whose current behavior depends on its own history. IDESolver provides a simple interface for solving these kinds of equations in Python., Three alternating direction implicit (ADI) finite element Galerkin methods for solving two-dimensional tempered fractional integro-differential equations are formulated and analyzed. For the time discretization, these methods are based on the backward Euler scheme, the Crank–Nicolson scheme and the second-order backward differentiation formula, respectively, each combined with an appropriate ..., k t =1 −τk. Our first main result is concerned with uniform stability. Theorem 1 If (C0), (C1), and (C2) hold, then the zero solution of (2) with zero initial function is uniformly stable. and the Lyapunov–Razumikhin method. It is clear that (16) is different from the equation con-sidered in our paper, i.e., (2)., We consider nonlinear integro-differential equations like the ones that arise from stochastic control problems with purely jump Lévy processes. We obtain a nonlocal version of the ABP estimate, Harnack inequality, and interior C 1, α regularity for general fully nonlinear integro-differential equations., Sep 8, 2017 · 1. I want to solve a integro-differential equation numerically. The equation is given by : c˙(t) = −∫t 0 dt1f(t −t1)c(t1) c ˙ ( t) = − ∫ 0 t d t 1 f ( t − t 1) c ( t 1) Hereby, f(t −t1) f ( t − t 1) will be given a realisation of some random numbers, e.g. f(t −t1) f ( t − t 1) originally was a rondom variable, and I want ... , Jun 22, 2017 · The solution detailed below is : With F(s) = F ( s) = Laplace transform of f(x) f ( x). Φ(s, t) =e−λt s F(s) Φ ( s, t) = e − λ t s F ( s) u(x, t) = Inverse Laplace Transform of Φ(s, t) u ( x, t) = Inverse Laplace Transform of Φ ( s, t) The result cannot be expressed more explicitly until the function f(x) f ( x) be explicitly given. , 1. Analog simulator of integro-differential equations with classical memristors. G. Alvarado Barrios, J. C. Retamal, E. Solano, and M. Sanz. Abstract—An analog computer makes use of continuously changeable quantities of a system, such as its electrical, mechani- cal, or hydraulic properties, to solve a given problem. , differential equation. Compute answers using Wolfram's breakthrough technology & knowledgebase, relied on by millions of students & professionals., As it is known, the sinc basis functions are not differentiable at zero, so we modified the basis functions into a non-classical basis which is differentiable with zero derivative at the initial point. The properties of sinc-collocation are used to reduce the system of integro-differential equations into a system of algebraic equations., This work investigates several discretizations of the Erdélyi-Kober fractional operator and their use in integro-differential equations. ... Invariant subspace method and exact solutions of certain nonlinear time fractional partial differential equations. Fractional Calc. Appl. Anal. 18(1), 146–162 (2015), acoth. asech. acsch. . . Here, we show you a step-by-step solved example of homogeneous differential equation. This solution was automatically generated by our smart calculator: \left (x-y\right)dx+xdy=0 (x y)dx xdy 0. We can identify that the differential equation \left (x-y\right)dx+x\cdot dy=0 (x−y)dx+x⋅dy = 0 is homogeneous, since it is ..., 1. Replace the right side by constant c. The d.e. f − σ2 2 f ″ − f ′ = c can be solved explicitly. Then you have an equation to solve: c = ∫∞0f ′ (x)2exp(ax + f(x)) dx. EDIT: With a nonlinear term, there is the real possibility that the solution will blow up at some finite t; even without it, the integral may diverge., A compact difference scheme is presented for a partial integro-differential equation. The integral term is treated by means of the product trapezoidal method. The stability and L 2 convergence are proved by the energy method. The convergence order is O (k 3 / 2 + h 4). Two numerical examples are given to support the theoretical results.