Quadratic Eigenvalue Problem Solvers - QEP

## Quadratic Eigenvalue Problem Solvers - QEP: Examples

The Quadratic Eigenvalue Problem (QEP) solver is the object provided by SLEPc for specifying a quadratic eigenvalue problem. Apart from the specific solvers for this type of problems, there is an EPS-based solver, i.e., it uses a solver from EPS to solve a generalized eigenproblem obtained after linearization.

As in the other solver objects, users can set various options at runtime via the options database (e.g., `-qep_nev 4 -qep_type linear`). Options can also be set directly in application codes by calling the corresponding routines (e.g., QEPSetDimensions() / QEPSetType()).

Beginner - Basic usage
| QEP | QEPGetConverged | QEPSetTarget
QEPComputeRelativeError | QEPGetEigenpair | QEPSolve
QEPComputeResidualNorm | QEPGetST | QEPType
QEPConvergedReason | QEPGetTarget | QEPView
QEPCreate | QEPSetFromOptions |
QEPDestroy | QEPSetOperators |
Intermediate - Setting options for algorithms and data structures
| QEPGetConvergedReason | QEPGetType | QEPSetInitialSpaceLeft
QEPGetDimensions | QEPGetWhichEigenpairs | QEPSetLeftVectorsWanted
QEPGetIterationNumber | QEPMonitorAll | QEPSetProblemType
QEPGetLeftVectorsWanted | QEPMonitorCancel | QEPSetScaleFactor
QEPGetMonitorContext | QEPMonitorConverged | QEPSetTolerances
QEPGetOperationCounters | QEPMonitorFirst | QEPSetTrackAll
QEPGetOperators | QEPMonitorSet | QEPSetType
QEPGetProblemType | QEPPrintSolution | QEPSetWhichEigenpairs
QEPGetScaleFactor | QEPProblemType | QEPWhich
QEPGetTolerances | QEPSetDimensions |
QEPGetTrackAll | QEPSetInitialSpace |
Advanced - Setting more advanced options and customization
| QEPAppendOptionsPrefix | QEPLinearGetExplicitMatrix | QEPSetConvergenceTest
QEPGetDS | QEPLinearSetCompanionForm | QEPSetDS
QEPGetErrorEstimate | QEPLinearSetEPS | QEPSetIP
QEPGetIP | QEPLinearSetExplicitMatrix | QEPSetOptionsPrefix
QEPGetOptionsPrefix | QEPRegister | QEPSetUp
QEPLinearGetCompanionForm | QEPRegisterAll |
QEPLinearGetEPS | QEPReset |
Developer - Interfaces intended primarily for library developers, not for typical applications programmers
| QEPCompareEigenvalues | QEPInitializePackage | QEPSetWorkVecs
QEPFinalizePackage | QEPSetST | QEPSortEigenvalues
No deprecated routines

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