c4lib, a FORTRAN77 code which implements certain elementary functions for single precision complex variables.
The symbol "C4" is used to suggest a single precision complex variable. Here the 4 indicates that the underlying pair of real numbers each use 4 bytes of storage.
The code contains routines that operate on scalars, vectors or doubly dimensioned arrays of C4's. A vector of C4's is denoted a C4VEC, and a doubly dimensioned array is a C4MAT.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
c4lib is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version and a Python version.
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