int SNESComputeHessian(SNES snes,Vec x,Mat *A,Mat *B,MatStructure *flag)Collective on SNES and Mat
snes | - the SNES context |
x | - input vector |
A | - Hessian matrix |
B | - optional preconditioning matrix |
flag | - flag indicating matrix structure |
See SLESSetOperators() for important information about setting the flag parameter.
SNESComputeHessian() is valid only for SNES_UNCONSTRAINED_MINIMIZATION methods. An analogous routine for SNES_NONLINEAR_EQUATIONS methods is SNESComputeJacobian().
SNESComputeHessian() is typically used within minimization implementations, so most users would not generally call this routine themselves.
Level:developer
Location:src/snes/interface/snes.c
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