PBEQU: computes row and column scalings intended to equilibrate a Hermitian positive definite band matrix A and reduce its condition number (with respect to the two-norm). S contains the scale factors, S(i) = 1/sqrt(A(i,i)), chosen so that the scaled matrix B with elements B(i,j) = S(i)*A(i,j)*S(j) has ones on the diagonal. This choice of S puts the condition number of B within a factor N of the smallest possible condition number over all possible diagonal scalings.
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| pure subroutine | cpbequ (uplo, n, kd, ab, ldab, s, scond, amax, info) |
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| | la_cpbequ |
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| pure subroutine | dpbequ (uplo, n, kd, ab, ldab, s, scond, amax, info) |
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| | la_dpbequ |
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| | la_qpbequ |
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| pure subroutine | spbequ (uplo, n, kd, ab, ldab, s, scond, amax, info) |
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| | la_spbequ |
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| | la_wpbequ |
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| pure subroutine | zpbequ (uplo, n, kd, ab, ldab, s, scond, amax, info) |
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| | la_zpbequ |
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PBEQU: computes row and column scalings intended to equilibrate a Hermitian positive definite band matrix A and reduce its condition number (with respect to the two-norm). S contains the scale factors, S(i) = 1/sqrt(A(i,i)), chosen so that the scaled matrix B with elements B(i,j) = S(i)*A(i,j)*S(j) has ones on the diagonal. This choice of S puts the condition number of B within a factor N of the smallest possible condition number over all possible diagonal scalings.
◆ cpbequ()
| pure subroutine la_lapack::pbequ::cpbequ |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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integer(ilp), intent(in) | kd, |
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complex(sp), dimension(ldab,*), intent(in) | ab, |
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integer(ilp), intent(in) | ldab, |
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real(sp), dimension(*), intent(out) | s, |
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real(sp), intent(out) | scond, |
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real(sp), intent(out) | amax, |
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integer(ilp), intent(out) | info ) |
◆ dpbequ()
| pure subroutine la_lapack::pbequ::dpbequ |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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integer(ilp), intent(in) | kd, |
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real(dp), dimension(ldab,*), intent(in) | ab, |
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integer(ilp), intent(in) | ldab, |
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real(dp), dimension(*), intent(out) | s, |
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real(dp), intent(out) | scond, |
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real(dp), intent(out) | amax, |
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integer(ilp), intent(out) | info ) |
◆ la_cpbequ()
| la_lapack::pbequ::la_cpbequ |
◆ la_dpbequ()
| la_lapack::pbequ::la_dpbequ |
◆ la_qpbequ()
| la_lapack::pbequ::la_qpbequ |
◆ la_spbequ()
| la_lapack::pbequ::la_spbequ |
◆ la_wpbequ()
| la_lapack::pbequ::la_wpbequ |
◆ la_zpbequ()
| la_lapack::pbequ::la_zpbequ |
◆ spbequ()
| pure subroutine la_lapack::pbequ::spbequ |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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integer(ilp), intent(in) | kd, |
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real(sp), dimension(ldab,*), intent(in) | ab, |
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integer(ilp), intent(in) | ldab, |
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real(sp), dimension(*), intent(out) | s, |
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real(sp), intent(out) | scond, |
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real(sp), intent(out) | amax, |
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integer(ilp), intent(out) | info ) |
◆ zpbequ()
| pure subroutine la_lapack::pbequ::zpbequ |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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integer(ilp), intent(in) | kd, |
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complex(dp), dimension(ldab,*), intent(in) | ab, |
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integer(ilp), intent(in) | ldab, |
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real(dp), dimension(*), intent(out) | s, |
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real(dp), intent(out) | scond, |
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real(dp), intent(out) | amax, |
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integer(ilp), intent(out) | info ) |
The documentation for this interface was generated from the following file:
