petsc-3.12.5 2020-03-29

KSPSolveTranspose

Solves the transpose of a linear system.

#include "petscksp.h" 
PetscErrorCode  KSPSolveTranspose(KSP ksp,Vec b,Vec x)

Collective on ksp

	ksp	- iterative context obtained from KSPCreate()
	b	- right hand side vector
	x	- solution vector

For complex numbers this solve the non-Hermitian transpose system.

This currently does NOT correctly use the null space of the operator and its transpose for solving singular systems.

We need to implement a KSPSolveHermitianTranspose()

developer