r8pp, a C code which carries out some basic linear algebra operations on R8PP matrices (real 64 bit precision positive definite symmetric packed format).
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
r8pp is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version
linear_algebra, C codes which carry out various linear algebra operations for matrices stored in a variety of formats.