SQRT15 generates a matrix with full or deficient rank and of various
 norms.

SCALE

          SCALE is INTEGER
          SCALE = 1: normally scaled matrix
          SCALE = 2: matrix scaled up
          SCALE = 3: matrix scaled down

RKSEL

          RKSEL is INTEGER
          RKSEL = 1: full rank matrix
          RKSEL = 2: rank-deficient matrix

M

          M is INTEGER
          The number of rows of the matrix A.

N

          N is INTEGER
          The number of columns of A.

NRHS

          NRHS is INTEGER
          The number of columns of B.

A

          A is REAL array, dimension (LDA,N)
          The M-by-N matrix A.

LDA

          LDA is INTEGER
          The leading dimension of the array A.

B

          B is REAL array, dimension (LDB, NRHS)
          A matrix that is in the range space of matrix A.

LDB

          LDB is INTEGER
          The leading dimension of the array B.

S

          S is REAL array, dimension MIN(M,N)
          Singular values of A.

RANK

          RANK is INTEGER
          number of nonzero singular values of A.

NORMA

          NORMA is REAL
          one-norm of A.

NORMB

          NORMB is REAL
          one-norm of B.

ISEED

          ISEED is integer array, dimension (4)
          seed for random number generator.

WORK

          WORK is REAL array, dimension (LWORK)

LWORK

          LWORK is INTEGER
          length of work space required.
          LWORK >= MAX(M+MIN(M,N),NRHS*MIN(M,N),2*N+M)

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Univ. of California Berkeley

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