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

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

NAME dgemm.f – SYNOPSIS Functions/Subroutines subroutine dgemm (TRANSA, TRANSB, M, N, K, ALPHA, A, LDA, B, LDB, BETA, C, LDC) DGEMM Function/Subroutine Documentation subroutine dgemm (characterTRANSA, characterTRANSB, integerM, integerN, integerK, double precisionALPHA, double precision, dimension(lda,*)A, integerLDA, double precision, dimension(ldb,*)B, integerLDB, double precisionBETA, double precision, dimension(ldc,*)C, integerLDC) DGEMM Purpose: DGEMM performs one of the matrix-matrix operations…

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

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

NAME dgelsy.f – SYNOPSIS Functions/Subroutines subroutine dgelsy (M, N, NRHS, A, LDA, B, LDB, JPVT, RCOND, RANK, WORK, LWORK, INFO) DGELSY solves overdetermined or underdetermined systems for GE matrices Function/Subroutine Documentation subroutine dgelsy (integerM, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, integer, dimension( * )JPVT, double…

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

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

NAME dgelsx.f – SYNOPSIS Functions/Subroutines subroutine dgelsx (M, N, NRHS, A, LDA, B, LDB, JPVT, RCOND, RANK, WORK, INFO) DGELSX solves overdetermined or underdetermined systems for GE matrices Function/Subroutine Documentation subroutine dgelsx (integerM, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, integer, dimension( * )JPVT, double precisionRCOND,…

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

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

NAME dgelss.f – SYNOPSIS Functions/Subroutines subroutine dgelss (M, N, NRHS, A, LDA, B, LDB, S, RCOND, RANK, WORK, LWORK, INFO) DGELSS solves overdetermined or underdetermined systems for GE matrices Function/Subroutine Documentation subroutine dgelss (integerM, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, double precision, dimension( * )S,…

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

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

NAME dgelsd.f – SYNOPSIS Functions/Subroutines subroutine dgelsd (M, N, NRHS, A, LDA, B, LDB, S, RCOND, RANK, WORK, LWORK, IWORK, INFO) DGELSD computes the minimum-norm solution to a linear least squares problem for GE matrices Function/Subroutine Documentation subroutine dgelsd (integerM, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B,…

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

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

NAME dgels.f – SYNOPSIS Functions/Subroutines subroutine dgels (TRANS, M, N, NRHS, A, LDA, B, LDB, WORK, LWORK, INFO) DGELS solves overdetermined or underdetermined systems for GE matrices Function/Subroutine Documentation subroutine dgels (characterTRANS, integerM, integerN, integerNRHS, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( ldb, * )B, integerLDB, double precision, dimension( * )WORK, integerLWORK,…

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

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

NAME dgelqf.f – SYNOPSIS Functions/Subroutines subroutine dgelqf (M, N, A, LDA, TAU, WORK, LWORK, INFO) DGELQF Function/Subroutine Documentation subroutine dgelqf (integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK, integerLWORK, integerINFO) DGELQF Purpose: DGELQF computes an LQ factorization of a real M-by-N matrix A: A…

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

DGELQ2 (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dgelq2.f – SYNOPSIS Functions/Subroutines subroutine dgelq2 (M, N, A, LDA, TAU, WORK, INFO) DGELQ2 computes the LQ factorization of a general rectangular matrix using an unblocked algorithm. Function/Subroutine Documentation subroutine dgelq2 (integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK, integerINFO) DGELQ2 computes the…

Read More DGELQ2 (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

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

NAME dgejsv.f – SYNOPSIS Functions/Subroutines subroutine dgejsv (JOBA, JOBU, JOBV, JOBR, JOBT, JOBP, M, N, A, LDA, SVA, U, LDU, V, LDV, WORK, LWORK, IWORK, INFO) DGEJSV Function/Subroutine Documentation subroutine dgejsv (character*1JOBA, character*1JOBU, character*1JOBV, character*1JOBR, character*1JOBT, character*1JOBP, integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( n )SVA, double precision, dimension( ldu,…

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

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

NAME dgehrd.f – SYNOPSIS Functions/Subroutines subroutine dgehrd (N, ILO, IHI, A, LDA, TAU, WORK, LWORK, INFO) DGEHRD Function/Subroutine Documentation subroutine dgehrd (integerN, integerILO, integerIHI, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK, integerLWORK, integerINFO) DGEHRD Purpose: DGEHRD reduces a real general matrix A to upper Hessenberg…

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

DGEHD2 (3) Linux Manual Page
ByLinux Manual Apr 20, 2026May 20, 2026

NAME dgehd2.f – SYNOPSIS Functions/Subroutines subroutine dgehd2 (N, ILO, IHI, A, LDA, TAU, WORK, INFO) DGEHD2 reduces a general square matrix to upper Hessenberg form using an unblocked algorithm. Function/Subroutine Documentation subroutine dgehd2 (integerN, integerILO, integerIHI, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )TAU, double precision, dimension( * )WORK, integerINFO) DGEHD2…

Read More DGEHD2 (3) Linux Manual Page
Linux Manuals | Linux Manuals session 3

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

NAME dgegv.f – SYNOPSIS Functions/Subroutines subroutine dgegv (JOBVL, JOBVR, N, A, LDA, B, LDB, ALPHAR, ALPHAI, BETA, VL, LDVL, VR, LDVR, WORK, LWORK, INFO) DGEEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for GE matrices Function/Subroutine Documentation subroutine dgegv (characterJOBVL, characterJOBVR, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension(…

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

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

NAME dgegs.f – SYNOPSIS Functions/Subroutines subroutine dgegs (JOBVSL, JOBVSR, N, A, LDA, B, LDB, ALPHAR, ALPHAI, BETA, VSL, LDVSL, VSR, LDVSR, WORK, LWORK, INFO) DGEEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for GE matrices Function/Subroutine Documentation subroutine dgegs (characterJOBVSL, characterJOBVSR, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension(…

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

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

NAME dgeevx.f – SYNOPSIS Functions/Subroutines subroutine dgeevx (BALANC, JOBVL, JOBVR, SENSE, N, A, LDA, WR, WI, VL, LDVL, VR, LDVR, ILO, IHI, SCALE, ABNRM, RCONDE, RCONDV, WORK, LWORK, IWORK, INFO) DGEEVX computes the eigenvalues and, optionally, the left and/or right eigenvectors for GE matrices Function/Subroutine Documentation subroutine dgeevx (characterBALANC, characterJOBVL, characterJOBVR, characterSENSE, integerN, double precision,…

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

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

NAME dgeev.f – SYNOPSIS Functions/Subroutines subroutine dgeev (JOBVL, JOBVR, N, A, LDA, WR, WI, VL, LDVL, VR, LDVR, WORK, LWORK, INFO) DGEEV computes the eigenvalues and, optionally, the left and/or right eigenvectors for GE matrices Function/Subroutine Documentation subroutine dgeev (characterJOBVL, characterJOBVR, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )WR, double…

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

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

NAME dgeesx.f – SYNOPSIS Functions/Subroutines subroutine dgeesx (JOBVS, SORT, SELECT, SENSE, N, A, LDA, SDIM, WR, WI, VS, LDVS, RCONDE, RCONDV, WORK, LWORK, IWORK, LIWORK, BWORK, INFO) DGEESX computes the eigenvalues, the Schur form, and, optionally, the matrix of Schur vectors for GE matrices Function/Subroutine Documentation subroutine dgeesx (characterJOBVS, characterSORT, logical, externalSELECT, characterSENSE, integerN, double…

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

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

NAME dgees.f – SYNOPSIS Functions/Subroutines subroutine dgees (JOBVS, SORT, SELECT, N, A, LDA, SDIM, WR, WI, VS, LDVS, WORK, LWORK, BWORK, INFO) DGEES computes the eigenvalues, the Schur form, and, optionally, the matrix of Schur vectors for GE matrices Function/Subroutine Documentation subroutine dgees (characterJOBVS, characterSORT, logical, externalSELECT, integerN, double precision, dimension( lda, * )A, integerLDA,…

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

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

NAME dgeequb.f – SYNOPSIS Functions/Subroutines subroutine dgeequb (M, N, A, LDA, R, C, ROWCND, COLCND, AMAX, INFO) DGEEQUB Function/Subroutine Documentation subroutine dgeequb (integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )R, double precision, dimension( * )C, double precisionROWCND, double precisionCOLCND, double precisionAMAX, integerINFO) DGEEQUB Purpose: DGEEQUB computes row and column…

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

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

NAME dgeequ.f – SYNOPSIS Functions/Subroutines subroutine dgeequ (M, N, A, LDA, R, C, ROWCND, COLCND, AMAX, INFO) DGEEQU Function/Subroutine Documentation subroutine dgeequ (integerM, integerN, double precision, dimension( lda, * )A, integerLDA, double precision, dimension( * )R, double precision, dimension( * )C, double precisionROWCND, double precisionCOLCND, double precisionAMAX, integerINFO) DGEEQU Purpose: DGEEQU computes row and column…

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

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

NAME dgecon.f – SYNOPSIS Functions/Subroutines subroutine dgecon (NORM, N, A, LDA, ANORM, RCOND, WORK, IWORK, INFO) DGECON Function/Subroutine Documentation subroutine dgecon (characterNORM, integerN, double precision, dimension( lda, * )A, integerLDA, double precisionANORM, double precisionRCOND, double precision, dimension( * )WORK, integer, dimension( * )IWORK, integerINFO) DGECON Purpose: DGECON estimates the reciprocal of the condition number of…

Read More DGECON (3) Linux Manual Page