---
name: "psdbsv"
section: "3"
platform: "linux"
package: "scalapack-doc"
version: "1.5-11"
release: "Debian 11 (Bullseye)"
platforms: ["linux"]
url: "https://new.carta.tech/psdbsv"
---

# psdbsv(3)

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

## NAME

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

## SYNOPSIS

- SUBROUTINE PSDBSV(

  N, BWL, BWU, NRHS, A, JA, DESCA, B, IB, DESCB, WORK, LWORK, INFO )

- INTEGER

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

- INTEGER

  DESCA( \* ), DESCB( \* )

- REAL

  A( \* ), B( \* ), WORK( \* )

## PURPOSE

PSDBSV solves a system of linear equations

where A(1:N, JA:JA+N-1) is an N-by-N real\
 banded diagonally dominant-like distributed\
 matrix with bandwidth BWL, BWU.\

Gaussian elimination without pivoting\
 is used to factor a reordering\
 of the matrix into L U.\

See PSDBTRF and PSDBTRS for details.\