The problem I wish to solve a general system of linear equations A*x=b. The m-by-m matrix is sparse, real, square, somewhat poorly-conditioned, non-symmetric, but it is singular (rank(A)==m-1) bec...

I am currently working on a project where we need to solve |Ax - b|^2. In this case, A is a very sparse matrix and A'A has at most 5 nonzero elements in each row. We are working with images and...

Can anyone please give me a simple example of how to add elements to a triplet matrix using CHOLMOD. I have tried something like this: cholmod_triplet *A; int k; void add_A_entry(int r, int c, d...