 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.
    </p>

    <p>
      C4LIB 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.
    </p>

    <h3 align = "center">
      Licensing:
    </h3>

    <p>
      The computer code and data files described and made available on