    The leading dimension of the array B.
          LDB &gt;= MAX(1,N*L),  if TRANS = 'N';
          LDB &gt;= MAX(1,M*K),  if TRANS = 'T' or TRANS = 'C'.

  C       (input/output)  DOUBLE PRECISION array, dimension (LDC,R)
          On entry with TRANS = 'N', the leading M*K-by-R part of
          this array must contain the matrix C.
          On entry with TRANS = 'T' or TRANS = 'C', the leading
          N*L-by-R part of this array must contain the matrix C.
          On exit with TRANS = 'N', the leadi