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# KSPGLTRGetMinEig
Get minimum eigenvalue computed by `KSPGLTR` 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode KSPGLTRGetMinEig(KSP ksp, PetscReal *e_min)
```
Collective


## Input Parameter

- ***ksp   -*** the iterative context



## Output Parameter

- ***e_min -*** the minimum eigenvalue





## See Also
 [](ch_ksp), `KSPGLTR`, `KSPGLTRGetLambda()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/cg/gltr/gltr.c.html#KSPGLTRGetMinEig">src/ksp/ksp/impls/cg/gltr/gltr.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/cg/gltr/gltr.c.html#KSPGLTRGetMinEig_GLTR">KSPGLTRGetMinEig_GLTR in src/ksp/ksp/impls/cg/gltr/gltr.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/ksp/impls/cg/gltr/gltr.c)


[Index of all KSP routines](index.md)  
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[Index of all manual pages](/manualpages/singleindex.md)