SUBPAK, a FORTRAN90 code which contains a number of utility routines.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
SUBPAK is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version.
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R4LIB, a FORTRAN90 code which contains many utility routines, using "R4" or "single precision real" arithmetic.
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