solver linear system equation

I need to solve to solve a "large" symmetric sparse linear systems, with matrix size 8000?

I heard about HSL, ITPACK, but I don't know how to use them, and I am working in C language.

• Welcome to SciComp.Exchange. If you want help it is better to explain more about your problem. What is the size of the matrix $8000\times8000$ or $80\times100$? What is the problem that origin this matrix? – nicoguaro Sep 28 '15 at 21:09
• The matrix is symmetric sparse and the size is 8000X8000 .. i want to solve that linear system. in C language. – ahmed baba Sep 28 '15 at 22:15