:orphan:
# SNES_CONVERGED_FNORM_RELATIVE
2-norm(F) <= rtol*2-norm(F(x_0)) where x_0 is the initial guess 


## See Also
 [](ch_snes), `SNES`, `SNESSolve()`, `SNESGetConvergedReason()`, `SNESConvergedReason`, `SNESSetTolerances()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/include/petscsnes.h.html#SNES_CONVERGED_FNORM_RELATIVE">include/petscsnes.h</A>


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[Index of all SNES routines](index.md)  
[Table of Contents for all manual pages](/manualpages/index.md)  
[Index of all manual pages](/manualpages/singleindex.md)