PZDBTRS(l)

📦 version 1.5, in ubuntu jammy

💖 PZDBTRS 💖

okay bestie, welcome to the PZDBTRS(l) manual page — it's a LAPACK routine (version 1.5) and it's here to solve systems of linear equations like a boss. no cap. ✨

✨ NAME ✨

  • PZDBTRS — solve a system of linear equations A(1:N, JA:JA+N-1) * X = B(IB:IB+N-1, 1:NRHS)

🦋 SYNOPSIS 🦋

       SUBROUTINE PZDBTRS( TRANS, N, BWL, BWU, NRHS, A, JA, DESCA, B, IB,
                           DESCB, AF, LAF, WORK, LWORK, INFO )

           CHARACTER       TRANS

           INTEGER         BWL, BWU, IB, INFO, JA, LAF, LWORK, N, NRHS

           INTEGER         DESCA( * ), DESCB( * )

           COMPLEX*16      A( * ), AF( * ), B( * ), WORK( * )

🌸 PURPOSE 🌸

okay so PZDBTRS solves a system of linear equations

                                         or
                 A(1:N, JA:JA+N-1)' * X = B(IB:IB+N-1, 1:NRHS)

where A(1:N, JA:JA+N-1) is the matrix used to produce the factors stored in A(1:N,JA:JA+N-1) and AF by PZDBTRF. A(1:N, JA:JA+N-1) is an N-by-N complex banded diagonally dominant-like distributed matrix with bandwidth BWL, BWU.

Routine PZDBTRF MUST be called first. periodt. 💅

okay that's the whole page, bestie. this gem is from LAPACK version 1.5, dated 12 May 1997, and it's the PZDBTRS(l) manual page. go solve something iconic. mwah 💋✨

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