f77_sytrf Interface
public interface f77_sytrf
Generic old style interface for SYTRF. Supports s, d. See also: mfi_sytrf, ssytrf, dsytrf.
Subroutines
public pure subroutine ssytrf(uplo, n, a, lda, ipiv, work, lwork, info)
Original interface for SSYTRF See also: mfi_sytrf, f77_sytrf. SSYTRF computes the factorization of a real symmetric matrix A using the Bunch-Kaufman diagonal pivoting method. The form of the factorization is A = UDUT or A = LDLT, where U (or L) is a product of permutation and unit upper (lower) triangular matrices, and D is block diagonal with 1-by-1 and 2-by-2 diagonal blocks.
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer, | intent(in) | :: | n | |||
| real(kind=REAL32), | intent(inout) | :: | a(lda,*) | |||
| integer, | intent(in) | :: | lda | |||
| integer, | intent(out) | :: | ipiv(*) | |||
| real(kind=REAL32), | intent(inout) | :: | work(*) | |||
| integer, | intent(in) | :: | lwork | |||
| integer, | intent(out) | :: | info |
public pure subroutine dsytrf(uplo, n, a, lda, ipiv, work, lwork, info)
Original interface for DSYTRF See also: mfi_sytrf, f77_sytrf. DSYTRF computes the factorization of a real symmetric matrix A using the Bunch-Kaufman diagonal pivoting method. The form of the factorization is A = UDUT or A = LDLT, where U (or L) is a product of permutation and unit upper (lower) triangular matrices, and D is block diagonal with 1-by-1 and 2-by-2 diagonal blocks.
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer, | intent(in) | :: | n | |||
| real(kind=REAL64), | intent(inout) | :: | a(lda,*) | |||
| integer, | intent(in) | :: | lda | |||
| integer, | intent(out) | :: | ipiv(*) | |||
| real(kind=REAL64), | intent(inout) | :: | work(*) | |||
| integer, | intent(in) | :: | lwork | |||
| integer, | intent(out) | :: | info |