Skip to main content
`Ctrl`+`K`

# SNES_DIVERGED_FNORM_NAN

the 2-norm of the current function evaluation is not-a-number (NaN), this is usually caused by a division of 0 by 0.

## See Also

SNES: Nonlinear Solvers, `SNES`, `SNESSolve()`, `SNESGetConvergedReason()`, `SNESConvergedReason`, `SNESSetTolerances()`

## Level

beginner

## Location

include/petscsnes.h

Index of all SNES routines
Table of Contents for all manual pages
Index of all manual pages