r8utt, a FORTRAN90 code which carries out some basic linear algebra operations on R8UTT matrices (real 64 bit precision upper triangular Toeplitz format).
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
r8utt is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version
linear_algebra, Fortran90 codes which carry out various linear algebra operations for matrices stored in a variety of formats.