DSYMM(3)

Bestie, you've landed on the dsymm.f(3) page from the Library Functions Manual ✨ The header path is /home/abui...SRC/dsymm.f(3) (yes, it's repeated in the layout, iykyk), and we're about to get into some symmetric-matrix main character energy 💅

💖 NAME 💖

• /home/abuild/rpmbuild/BUILD/lapack-static-3.12.0-build/lapack-3.12.0/BLAS/SRC/dsymm.f — that's the name, periodt 🎀

✨ SYNOPSIS ✨

Functions/Subroutines

subroutine DSYMM (side, uplo, m, n, alpha, a, lda, b, ldb, beta, c, ldc)
    DSYMM

🫶 Function/Subroutine Documentation 🫶

Okay so here's the full signature, no cap:

   subroutine DSYMM (character side, character uplo, integer m, integer n,
       double precision alpha, double precision, dimension(lda,*) a, integer
       lda, double precision, dimension(ldb,*) b, integer ldb, double precision
       beta, double precision, dimension(ldc,*) c, integer ldc)
       DSYMM

DSYMM is literally the icon of this page, fr fr.

🌸 Purpose 🌸

DSYMM performs one of the matrix-matrix operations:

C := alpha*A*B + beta*C,

or

C := alpha*B*A + beta*C,

where alpha and beta are scalars, A is a symmetric matrix and B and C are m by n matrices. Obsessed with the clarity 💖

🍓 Parameters 🍓

Every parameter, every condition — we're not skipping a single crumb 🍓

• SIDE — SIDE is CHARACTER*1. On entry, SIDE specifies whether the symmetric matrix A appears on the left or right in the operation, like this:
  • SIDE = 'L' or 'l' → C := alpha*A*B + beta*C,
  • SIDE = 'R' or 'r' → C := alpha*B*A + beta*C,
• UPLO — UPLO is CHARACTER*1. On entry, UPLO specifies whether the upper or lower triangular part of the symmetric matrix A is to be referenced, like:
  • UPLO = 'U' or 'u' → only the upper triangular part of the symmetric matrix is to be referenced.
  • UPLO = 'L' or 'l' → only the lower triangular part of the symmetric matrix is to be referenced.
• M — M is INTEGER. On entry, M specifies the number of rows of the matrix C. M must be at least zero.
• N — N is INTEGER. On entry, N specifies the number of columns of the matrix C. N must be at least zero.
• ALPHA — ALPHA is DOUBLE PRECISION. On entry, ALPHA specifies the scalar alpha.
• A — A is DOUBLE PRECISION array, dimension ( LDA, ka ), where ka is m when SIDE = 'L' or 'l' and is n otherwise. Before entry with SIDE = 'L' or 'l', the m by m part of the array A must contain the symmetric matrix, such that when UPLO = 'U' or 'u', the leading m by m upper triangular part of the array A must contain the upper triangular part of the symmetric matrix and the strictly lower triangular part of A is not referenced, and when UPLO = 'L' or 'l', the leading m by m lower triangular part of the array A must contain the lower triangular part of the symmetric matrix and the strictly upper triangular part of A is not referenced. Before entry with SIDE = 'R' or 'r', the n by n part of the array A must contain the symmetric matrix, such that when UPLO = 'U' or 'u', the leading n by n upper triangular part of the array A must contain the upper triangular part of the symmetric matrix and the strictly lower triangular part of A is not referenced, and when UPLO = 'L' or 'l', the leading n by n lower triangular part of the array A must contain the lower triangular part of the symmetric matrix and the strictly upper triangular part of A is not referenced.
• LDA — LDA is INTEGER. On entry, LDA specifies the first dimension of A as declared in the calling (sub) program. When SIDE = 'L' or 'l' then LDA must be at least max( 1, m ), otherwise LDA must be at least max( 1, n ).
• B — B is DOUBLE PRECISION array, dimension ( LDB, N ). Before entry, the leading m by n part of the array B must contain the matrix B.
• LDB — LDB is INTEGER. On entry, LDB specifies the first dimension of B as declared in the calling (sub) program. LDB must be at least max( 1, m ).
• BETA — BETA is DOUBLE PRECISION. On entry, BETA specifies the scalar beta. When BETA is supplied as zero then C need not be set on input.
• C — C is DOUBLE PRECISION array, dimension ( LDC, N ). Before entry, the leading m by n part of the array C must contain the matrix C, except when beta is zero, in which case C need not be set on entry. On exit, the array C is overwritten by the m by n updated matrix.
• LDC — LDC is INTEGER. On entry, LDC specifies the first dimension of C as declared in the calling (sub) program. LDC must be at least max( 1, m ).

👑 Author 👑

These legends are credited:

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

🔥 Further Details 🔥

Level 3 Blas routine.

-- Written on 8-February-1989.

• Jack Dongarra, Argonne National Laboratory.
• Iain Duff, AERE Harwell.
• Jeremy Du Croz, Numerical Algorithms Group Ltd.
• Sven Hammarling, Numerical Algorithms Group Ltd.

Definition at line 188 of file dsymm.f.

🙈 Author 🙈

Generated automatically by Doxygen for LAPACK from the source code. Iconic automation moment 🤖✨

---

And that's the whole page, bestie 🫶 Footer cuties: LAPACK Version 3.12.0, footer path /home/abui...SRC/dsymm.f(3). No date printed in the original footer, so no fake-date energy here 💀💖