General Description
Many of the general analysis produce a sparse set of linear system of equations. Solving large linear system of equations require efficient robust linear equation solver. Direct method tend to be more robust than iterative methods. Direct Sparse Solver are the solution for solving large scale linear system of equations.Specifications:
VIS is an iterative linear equation solver. It is robust and efficient sparse solver. It uses minimum memory when solving the linear system of equations. Memory is dynamically allocated within the solver and the user does not have to worry about allocation of memory . It is packaged so that it is easy to use and implement within any code. Users and developers can use it as a black box.VIS has been implemented on many computer platforms such as IBM, SGI, CRAY, SUN, HP, DEC, and PC's.
Limitations:
VIS can solve symmetric definite and indefinite linear system of equations using real arithmetic's.Future release
Work is underway to develop new preconditioner techniques for the solver.