Jafar Khazaian - Department of Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran.
Nouredin Parandin - Department of Mathematics Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
Farajollah Mohammadi Yaghoobi - Department of Mathematics Hamedan Branch, Islamic Azad University Hamedan, Iran.
Nasrin Karami Kabir - Department of Mathematics, Hamedan Branch, Islamic Azad University, Hamedan, Iran.

In this paper, we present a new numerical technique based on Block-pulse functions to solve two-dimensional Volterra-Fredholm integral equations of the second kind. To produce Block-pulse functions, the orthogonal Legendre polynomials is used. Furthermore, operational matrix is applied to convert two-dimensional Volterra-Fredholm integral equations to a linear algebraic system. The convergence analysis of the new method is discussed. Finally, some numerical examples are given to confirm the applicability and efficiency of the new method for solving two-dimensional Volterra-Fredholm integral equations of the second kind.

Volterra-Fredholm integral equations, Block-pulse functions, Operational matrix, legendre polynomials