inverse of T. The elements
          in the strictly upper / lower triangular part are not
          referenced.

  LDL     INTEGER
          The leading dimension of the array L.
          LDL &gt;= MAX(1, M*K),         if TYPET = 'R' and JOB = 'A';
          LDL &gt;= MAX(1, ( N + M )*K), if TYPET = 'C' and JOB = 'A';
          LDL &gt;= 1,                   if JOB = 'R', or 'O'.

  CS      (input/output)  DOUBLE PRECISION array, dimension (LCS)
          On input, the leading 3*(N-1)*K part of this array