Mathematical modeling of diffusion problem

Document Type : Research Paper


Department of Mathematics, Karaj Branch, Islamic Azad University, Karaj, Iran


‎This work aims to introduce a numerical approximation procedure based on an operational matrix of block pulse functions‎, ‎which is employed in solving integral-algebraic equations arising from the diffusion model‎. ‎It is known that the integral-algebraic equations belong to the class of singular problems‎. ‎The main advantage of this method is the reduction of these singular systems by using an operational matrix to linear lower triangular systems of algebraic equations‎, ‎which is non-singular‎. ‎An estimation of the error and illustrative instances are discussed to evaluate the validity and applicability of the presented method‎.


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Volume 13, Issue 1
March 2022
Pages 2065-2073
  • Receive Date: 24 June 2019
  • Accept Date: 03 September 2019
  • First Publish Date: 05 December 2021