Linux Manuals

The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.

Linux Manuals | Linux Manuals session 3

DSYMM (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsymm.f – SYNOPSIS Functions/Subroutines subroutine dsymm (SIDE, UPLO, M, N, ALPHA, A, LDA, B, LDB, BETA, C, LDC) DSYMM Function/Subroutine Documentation subroutine dsymm (characterSIDE, characterUPLO, integerM, integerN, double precisionALPHA, double precision, dimension(lda,*)A, integerLDA, double precision, dimension(ldb,*)B, integerLDB, double precisionBETA, double precision, dimension(ldc,*)C, integerLDC) DSYMM Purpose: DSYMM performs one of the matrix-matrix operations C :=…

Read More DSYMM (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYGVX (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsygvx.f – SYNOPSIS Functions/Subroutines subroutine dsygvx (ITYPE, JOBZ, RANGE, UPLO, N, A, LDA, B, LDB, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, WORK, LWORK, IWORK, IFAIL, INFO) DSYGST Function/Subroutine Documentation subroutine dsygvx (integerITYPE, characterJOBZ, characterRANGE, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, double…

Read More DSYGVX (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYGVD (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsygvd.f – SYNOPSIS Functions/Subroutines subroutine dsygvd (ITYPE, JOBZ, UPLO, N, A, LDA, B, LDB, W, WORK, LWORK, IWORK, LIWORK, INFO) DSYGST Function/Subroutine Documentation subroutine dsygvd (integerITYPE, characterJOBZ, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, double precision, dimension( * )W, double precision, dimension( * )WORK, integerLWORK,…

Read More DSYGVD (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYGV (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsygv.f – SYNOPSIS Functions/Subroutines subroutine dsygv (ITYPE, JOBZ, UPLO, N, A, LDA, B, LDB, W, WORK, LWORK, INFO) DSYGST Function/Subroutine Documentation subroutine dsygv (integerITYPE, characterJOBZ, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, double precision, dimension( * )W, double precision, dimension( * )WORK, integerLWORK, integerINFO) DSYGST…

Read More DSYGV (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYGST (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsygst.f – SYNOPSIS Functions/Subroutines subroutine dsygst (ITYPE, UPLO, N, A, LDA, B, LDB, INFO) DSYGST Function/Subroutine Documentation subroutine dsygst (integerITYPE, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, integerINFO) DSYGST Purpose: DSYGST reduces a real symmetric-definite generalized eigenproblem to standard form. If ITYPE = 1, the…

Read More DSYGST (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYGS2 (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsygs2.f – SYNOPSIS Functions/Subroutines subroutine dsygs2 (ITYPE, UPLO, N, A, LDA, B, LDB, INFO) DSYGS2 reduces a symmetric definite generalized eigenproblem to standard form, using the factorization results obtained from spotrf (unblocked algorithm). Function/Subroutine Documentation subroutine dsygs2 (integerITYPE, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB,…

Read More DSYGS2 (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYEVX (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyevx.f – SYNOPSIS Functions/Subroutines subroutine dsyevx (JOBZ, RANGE, UPLO, N, A, LDA, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, WORK, LWORK, IWORK, IFAIL, INFO) DSYEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for SY matrices Function/Subroutine Documentation subroutine dsyevx (characterJOBZ, characterRANGE, characterUPLO, integerN, double precision, dimension( lda, * )A,…

Read More DSYEVX (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYEVR (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyevr.f – SYNOPSIS Functions/Subroutines subroutine dsyevr (JOBZ, RANGE, UPLO, N, A, LDA, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, LIWORK, INFO) DSYEVR computes the eigenvalues and, optionally, the left and/or right eigenvectors for SY matrices Function/Subroutine Documentation subroutine dsyevr (characterJOBZ, characterRANGE, characterUPLO, integerN, double precision, dimension( lda, *…

Read More DSYEVR (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYEVD (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyevd.f – SYNOPSIS Functions/Subroutines subroutine dsyevd (JOBZ, UPLO, N, A, LDA, W, WORK, LWORK, IWORK, LIWORK, INFO) DSYEVD computes the eigenvalues and, optionally, the left and/or right eigenvectors for SY matrices Function/Subroutine Documentation subroutine dsyevd (characterJOBZ, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )W, double precision, dimension( *…

Read More DSYEVD (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYEV (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyev.f – SYNOPSIS Functions/Subroutines subroutine dsyev (JOBZ, UPLO, N, A, LDA, W, WORK, LWORK, INFO) DSYEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for SY matrices Function/Subroutine Documentation subroutine dsyev (characterJOBZ, characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )W, double precision, dimension( * )WORK, integerLWORK,…

Read More DSYEV (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYEQUB (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyequb.f – SYNOPSIS Functions/Subroutines subroutine dsyequb (UPLO, N, A, LDA, S, SCOND, AMAX, WORK, INFO) DSYEQUB Function/Subroutine Documentation subroutine dsyequb (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )S, double precisionSCOND, double precisionAMAX, double precision, dimension( * )WORK, integerINFO) DSYEQUB Purpose: DSYEQUB computes row and column scalings intended to…

Read More DSYEQUB (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYCONV (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsyconv.f – SYNOPSIS Functions/Subroutines subroutine dsyconv (UPLO, WAY, N, A, LDA, IPIV, WORK, INFO) DSYCONV Function/Subroutine Documentation subroutine dsyconv (characterUPLO, characterWAY, integerN, double precision, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, double precision, dimension( * )WORK, integerINFO) DSYCONV Purpose: DSYCONV convert A given by TRF into L and D and vice-versa. Get…

Read More DSYCONV (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSYCON (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsycon.f – SYNOPSIS Functions/Subroutines subroutine dsycon (UPLO, N, A, LDA, IPIV, ANORM, RCOND, WORK, IWORK, INFO) DSYCON Function/Subroutine Documentation subroutine dsycon (characterUPLO, integerN, double precision, dimension( lda, * )A, integerLDA, integer, dimension( * )IPIV, double precisionANORM, double precisionRCOND, double precision, dimension( * )WORK, integer, dimension( * )IWORK, integerINFO) DSYCON Purpose: DSYCON estimates the reciprocal…

Read More DSYCON (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSWAP (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dswap.f – SYNOPSIS Functions/Subroutines subroutine dswap (N, DX, INCX, DY, INCY) DSWAP Function/Subroutine Documentation subroutine dswap (integerN, double precision, dimension(*)DX, integerINCX, double precision, dimension(*)DY, integerINCY) DSWAP Purpose: interchanges two vectors. uses unrolled loops for increments equal one. Author: Univ. of Tennessee Univ. of California Berkeley Univ. of Colorado Denver NAG Ltd. Date: November…

Read More DSWAP (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTEVX (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dstevx.f – SYNOPSIS Functions/Subroutines subroutine dstevx (JOBZ, RANGE, N, D, E, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, WORK, IWORK, IFAIL, INFO) DSTEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentation subroutine dstevx (characterJOBZ, characterRANGE, integerN, double precision, dimension( * )D, double precision, dimension( *…

Read More DSTEVX (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTEVR (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dstevr.f – SYNOPSIS Functions/Subroutines subroutine dstevr (JOBZ, RANGE, N, D, E, VL, VU, IL, IU, ABSTOL, M, W, Z, LDZ, ISUPPZ, WORK, LWORK, IWORK, LIWORK, INFO) DSTEVR computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentation subroutine dstevr (characterJOBZ, characterRANGE, integerN, double precision, dimension( * )D, double precision,…

Read More DSTEVR (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTEVD (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dstevd.f – SYNOPSIS Functions/Subroutines subroutine dstevd (JOBZ, N, D, E, Z, LDZ, WORK, LWORK, IWORK, LIWORK, INFO) DSTEVD computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentation subroutine dstevd (characterJOBZ, integerN, double precision, dimension( * )D, double precision, dimension( * )E, double precision, dimension( ldz, * )Z, integerLDZ,…

Read More DSTEVD (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTEV (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dstev.f – SYNOPSIS Functions/Subroutines subroutine dstev (JOBZ, N, D, E, Z, LDZ, WORK, INFO) DSTEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for OTHER matrices Function/Subroutine Documentation subroutine dstev (characterJOBZ, integerN, double precision, dimension( * )D, double precision, dimension( * )E, double precision, dimension( ldz, * )Z, integerLDZ, double precision, dimension(…

Read More DSTEV (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTERF (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsterf.f – SYNOPSIS Functions/Subroutines subroutine dsterf (N, D, E, INFO) DSTERF Function/Subroutine Documentation subroutine dsterf (integerN, double precision, dimension( * )D, double precision, dimension( * )E, integerINFO) DSTERF Purpose: DSTERF computes all eigenvalues of a symmetric tridiagonal matrix using the Pal-Walker-Kahan variant of the QL or QR algorithm. Parameters: N N is INTEGER…

Read More DSTERF (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

DSTEQR (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dsteqr.f – SYNOPSIS Functions/Subroutines subroutine dsteqr (COMPZ, N, D, E, Z, LDZ, WORK, INFO) DSTEQR Function/Subroutine Documentation subroutine dsteqr (characterCOMPZ, integerN, double precision, dimension( * )D, double precision, dimension( * )E, double precision, dimension( ldz, * )Z, integerLDZ, double precision, dimension( * )WORK, integerINFO) DSTEQR Purpose: DSTEQR computes all eigenvalues and, optionally, eigenvectors of…

Read More DSTEQR (3) Linux Manual Page