On Some Classes of Fredholm-Volterra Integral Equations in Two Variables (original) (raw)

Fredholm Integral Equations of the Second Kind (General Kernel

In Chap. 1, we conducted a thorough examination of the Fredholm integral equation of the second kind for an arbitrary complex parameter λ , assuming that the free term f (x) is complex-valued and continuous on the interval [a, b] and that the kernel K(x,t) is complex-valued, continuous, and separable on the square Q(a, b) = {(x,t) : [a, b] × [a, b]}. We stated the four Fredholm theorems and the Fredholm Alternative Theorem which provide for the construction of all possible solutions to the equation under these assumptions. A question naturally arises: What, if anything, can be proven if K(x,t) is a general kernel, i.e., an arbitrary kernel that is only assumed to be complex-valued and continuous? In this chapter, we will answer this question completely by proving that all of the Fredholm theorems continue to hold in this eventuality. In Sect. 2.1, we present several tools of the trade which are indispensible for the comprehension of the material in this chapter. In Sects. 2.2 and 2.3, we use these tools to show that the Fredholm integral equation of the second kind with a general kernel has a unique solution if the product of the parameter λ and the " size " of the kernel is small. In Sect. 2.4, we prove the validity of the Fredholm theorems for unrestricted λ and a general kernel. In Sect. 2.5, we show how to construct the resolvent kernel that appears in the solution to the integral equation recursively. In Sect. 2.6, we introduce numerical methods for producing an approximation to the solution of a Fredholm integral equation. These methods are necessary due to the inherent computational difficulties in constructing the resolvent kernel.

SOLVABILITY OF SOME INTEGRAL EQUATIONS IN HILBERT SPACES

We consider an integral equation of Fredholm and Volterra type with spectral parameter depending on time. Conditions of solvability are established when the initial value of the parameter coincides with an eigenvalue of Fredholm operator. 2000 Mathematics Subject Classification. 45A05.

Weakly Singular Volterra and Fredholm-Volterra Integral Equations

2002

Some existence and uniqueness theorems are established for weakly singular Volterra and Fredholm-Volterra integral equations in C[a, b]. Our method is based on fixed point theorems which are applied to the iterated operator and we apply the fiber Picard operator theorem to establish differentiability with respect to parameter. This method can be applied only for linear equations because otherwise we can’t compute the iterated equation.

Fredholm type integral equation with special functions

Acta Universitatis Sapientiae Mathematica, 2018

Recently Chaurasia and Gill [7], Chaurasia and Kumar [8] have solved the one-dimensional integral equation of Fredholm type involving the product of special functions. We solve an integral equation involving the product of a class of multivariable polynomials, the mul-tivariable H-function defined by Srivastava and Panda [29, 30] and the multivariable I-function defined by Prasad [21] by the application of fractional calculus theory. The results obtained here are general in nature and capable of yielding a large number of results (known and new) scattered in the literature.

Analytical discussion for the mixed integral equations

Springer International Publishing AG, part of Springer Nature 2018, 2018

This paper presents a numerical method for the solution of a Volterra–Fredholm integral equation in a Banach space. Banachs fixed point theorem is used to prove the existence and uniqueness of the solution. To find the numerical solution, the integral equation is reduced to a system of linear Fredholm integral equations, which is then solved numerically using the degenerate kernel method. Normality and continuity of the integral operator are also discussed. The numerical examples in Sect. 5 illustrate the applicability of the theoretical results.

Nonlinear Fredholm Integral Equations

2020

In this paper, we present a new approximate method for solving systems of nonlinear Fredholm integral equation. This method is based on, first, differentiating both sides of integral equations n times and then substituting the Taylor series the unknown functions in the resulting equation and later, transforming to a matrix equation. By merging these results, a new system which corresponds to a system of linear algebraic equations is obtained. The solution of this system yields the Taylor coefficients of the solution function. Numerical results and comparisons with the exact solution are included to demostrate the validity and applicability of the technique.