f77_pocon Interface
public interface f77_pocon
Generic old style interface for POCON. Supports s, d, c, z. See also: mfi_pocon, spocon, dpocon, cpocon, zpocon.
Subroutines
public pure subroutine spocon(uplo, n, a, lda, anorm, rcond, work, iwork, info)
Original interface for SPOCON See also: mfi_pocon, f77_pocon. spocon estimates the reciprocal of the condition number (in the 1-norm) of a real(REAL32) Hermitian positive definite matrix using the Cholesky factorization or ( A = LL^\dagger |) computed by SPOTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
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 | |||
| real(kind=REAL32), | intent(in) | :: | anorm | |||
| real(kind=REAL32), | intent(out) | :: | rcond | |||
| real(kind=REAL32), | intent(inout) | :: | work(*) | |||
| integer, | intent(inout) | :: | iwork(*) | |||
| integer, | intent(out) | :: | info |
public pure subroutine dpocon(uplo, n, a, lda, anorm, rcond, work, iwork, info)
Original interface for DPOCON See also: mfi_pocon, f77_pocon. dpocon estimates the reciprocal of the condition number (in the 1-norm) of a real(REAL64) Hermitian positive definite matrix using the Cholesky factorization or ( A = LL^\dagger |) computed by DPOTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
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 | |||
| real(kind=REAL64), | intent(in) | :: | anorm | |||
| real(kind=REAL64), | intent(out) | :: | rcond | |||
| real(kind=REAL64), | intent(inout) | :: | work(*) | |||
| integer, | intent(inout) | :: | iwork(*) | |||
| integer, | intent(out) | :: | info |
public pure subroutine cpocon(uplo, n, a, lda, anorm, rcond, work, rwork, info)
Original interface for CPOCON See also: mfi_pocon, f77_pocon. cpocon estimates the reciprocal of the condition number (in the 1-norm) of a complex(REAL32) Hermitian positive definite matrix using the Cholesky factorization or ( A = LL^\dagger |) computed by CPOTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer, | intent(in) | :: | n | |||
| complex(kind=REAL32), | intent(inout) | :: | a(lda,*) | |||
| integer, | intent(in) | :: | lda | |||
| real(kind=REAL32), | intent(in) | :: | anorm | |||
| real(kind=REAL32), | intent(out) | :: | rcond | |||
| complex(kind=REAL32), | intent(inout) | :: | work(*) | |||
| real(kind=REAL32), | intent(inout) | :: | rwork(*) | |||
| integer, | intent(out) | :: | info |
public pure subroutine zpocon(uplo, n, a, lda, anorm, rcond, work, rwork, info)
Original interface for ZPOCON See also: mfi_pocon, f77_pocon. zpocon estimates the reciprocal of the condition number (in the 1-norm) of a complex(REAL64) Hermitian positive definite matrix using the Cholesky factorization or ( A = LL^\dagger |) computed by ZPOTRF. An estimate is obtained for norm(inv(A)), and the reciprocal of the condition number is computed as RCOND = 1 / (ANORM * norm(inv(A))).
Arguments
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| character(len=1), | intent(in) | :: | uplo | |||
| integer, | intent(in) | :: | n | |||
| complex(kind=REAL64), | intent(inout) | :: | a(lda,*) | |||
| integer, | intent(in) | :: | lda | |||
| real(kind=REAL64), | intent(in) | :: | anorm | |||
| real(kind=REAL64), | intent(out) | :: | rcond | |||
| complex(kind=REAL64), | intent(inout) | :: | work(*) | |||
| real(kind=REAL64), | intent(inout) | :: | rwork(*) | |||
| integer, | intent(out) | :: | info |