# Recurrence solution of a block tridiagonal matrix equation with Neumann, Dirichlet, mixed or periodic boundary conditions

## Description

Title of program: PERDIAG Catalogue Id: AARF_v1_0 Nature of problem A theorist may wish to solve the matrix equation AU = W, rapidly, where A is a block tridiagonal matrix. This type of matrix equation frequently arises in the solution of problems in one space dimension; in the soluion of boundary-value and many initial-value problems (because the time-dependent problem has been formulated implicitly), where it is necessary to solve n coupled, finite difference equations. The program is capable of dealing with Neumann, Dirichlet, mixed or periodic boundary condi ... Versions of this program held in the CPC repository in Mendeley Data AARF_v1_0; PERDIAG; 10.1016/0010-4655(81)90092-8 This program has been imported from the CPC Program Library held at Queen's University Belfast (1969-2018)