Convergence of the sinc method applied to delay Volterra integral equations

In this paperý, ýthe numerical solutions of linear and nonlinear Volterra integralý ýequations with nonvanishing delay are considered by two methodsý. ýThe methods are developed by means ofý ýthe sinc approximation with the single exponential (SE) and double exponential (DE)ý ýtransformationsý. ýThe existence and uniqueness of sinc-collocation solutions for these equations are providedý. ýThese methods improve conventional results and achieve exponential convergenceý. ýNumerical results are included to confirm the efficiency and accuracy of the methods.