asa314, a FORTRAN77 code which computes the inverse of a matrix whose elements are subject to modulo arithmetic, by Roger Payne.
This is a version of Applied Statistics Algorithm 314.
The computer code and data files described and made available on this web page are distributed under the MIT license
asa314 is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version.