Spectral Transformation - ST: Examples

The Spectral Transformation (ST) class encapsulates the functionality required for acceleration techniques based on the transformation of the spectrum. As explained in the SLEPc Users Manual, the eigensolvers implemented in EPS work by applying an operator to a set of vectors and this operator can adopt different forms. The ST object handles all the different possibilities in a uniform way, so that the solver can proceed without knowing which transformation has been selected.

The type of spectral transformation can be specified at run time (e.g., -st_type sinvert) as well as several parameters such as the value of the shift (e.g., -st_shift 1.5).

ST objects are always related to EPS objects. Users should not create a standalone ST object. ST options can also be set directly in application codes by first extracting the ST context from the EPS context via EPSGetST() and then directly calling the ST routines (e.g., STSetType() / STSetShift()).

Beginner - Basic usage
ST STGetShift STType
STCreate STSetFromOptions STView
STDestroy STSetShift
Intermediate - Setting options for algorithms and data structures
STCayleyGetAntishift STGetOperationCounters STResetOperationCounters
STCayleySetAntishift STGetOperators STSetMatMode
STGetKSP STGetType STSetOperators
STGetMatMode STMatMode STSetType
Advanced - Setting more advanced options and customization
STAppendOptionsPrefix STRegister STSetKSP
STComputeExplicitOperator STRegisterAll STSetMatStructure
STGetMatStructure STRegisterDestroy STSetOptionsPrefix
STGetOptionsPrefix STRegisterDynamic STSetUp
STPrecondGetMatForPC STReset STShellGetContext
STPrecondSetMatForPC STSHELL STShellSetContext
Developer - Interfaces intended primarily for library developers, not for typical applications programmers
STApply STGetBilinearForm STSetDefaultShift
STApplyTranspose STInitializePackage STShellSetApply
STBackTransform STPostSolve STShellSetApplyTranspose
STCheckNullSpace STPrecondGetKSPHasMat STShellSetBackTransform
STFinalizePackage STPrecondSetKSPHasMat
STGetBalanceMatrix STSetBalanceMatrix
No deprecated routines

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