SYEVD: computes all eigenvalues and, optionally, eigenvectors of a real symmetric matrix A. If eigenvectors are desired, it uses a divide and conquer algorithm. The divide and conquer algorithm makes very mild assumptions about floating point arithmetic. It will work on machines with a guard digit in add/subtract, or on those binary machines without guard digits which subtract like the Cray X-MP, Cray Y-MP, Cray C-90, or Cray-2. It could conceivably fail on hexadecimal or decimal machines without guard digits, but we know of none. Because of large use of BLAS of level 3, SYEVD needs N**2 more workspace than DSYEVX.
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| subroutine | dsyevd (jobz, uplo, n, a, lda, w, work, lwork, iwork, liwork, info) |
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| | la_dsyevd |
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| | la_qsyevd |
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| subroutine | ssyevd (jobz, uplo, n, a, lda, w, work, lwork, iwork, liwork, info) |
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| | la_ssyevd |
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SYEVD: computes all eigenvalues and, optionally, eigenvectors of a real symmetric matrix A. If eigenvectors are desired, it uses a divide and conquer algorithm. The divide and conquer algorithm makes very mild assumptions about floating point arithmetic. It will work on machines with a guard digit in add/subtract, or on those binary machines without guard digits which subtract like the Cray X-MP, Cray Y-MP, Cray C-90, or Cray-2. It could conceivably fail on hexadecimal or decimal machines without guard digits, but we know of none. Because of large use of BLAS of level 3, SYEVD needs N**2 more workspace than DSYEVX.
◆ dsyevd()
| subroutine la_lapack::syevd::dsyevd |
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character, intent(in) | jobz, |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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real(dp), dimension(lda,*), intent(inout) | a, |
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integer(ilp), intent(in) | lda, |
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real(dp), dimension(*), intent(out) | w, |
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real(dp), dimension(*), intent(out) | work, |
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integer(ilp), intent(in) | lwork, |
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integer(ilp), dimension(*), intent(out) | iwork, |
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integer(ilp), intent(in) | liwork, |
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integer(ilp), intent(out) | info ) |
◆ la_dsyevd()
| la_lapack::syevd::la_dsyevd |
◆ la_qsyevd()
| la_lapack::syevd::la_qsyevd |
◆ la_ssyevd()
| la_lapack::syevd::la_ssyevd |
◆ ssyevd()
| subroutine la_lapack::syevd::ssyevd |
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character, intent(in) | jobz, |
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character, intent(in) | uplo, |
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integer(ilp), intent(in) | n, |
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real(sp), dimension(lda,*), intent(inout) | a, |
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integer(ilp), intent(in) | lda, |
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real(sp), dimension(*), intent(out) | w, |
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real(sp), dimension(*), intent(out) | work, |
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integer(ilp), intent(in) | lwork, |
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integer(ilp), dimension(*), intent(out) | iwork, |
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integer(ilp), intent(in) | liwork, |
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integer(ilp), intent(out) | info ) |
The documentation for this interface was generated from the following file:
