Hi, I'm writing a program which solves for a list of coefficients in

matrix form:

b = [b1,b2,b3...]

The equation I'm trying to solve is:

Ab = z

where A is a symmetric matrix and z has the same dimensions as b.

The obvious solution is b = invs(A) z. However A is at least a 12x12 so

the inverse takes a long time to calculate (obviously).

Is there some other method which is faster?

Thanks in advance