slepc-3.19.2 2023-09-05
   
FNEvaluateFunctionMatVec
Computes the first column of the matrix f(A) for a given matrix A. 
Synopsis
#include "slepcfn.h" 
PetscErrorCode FNEvaluateFunctionMatVec(FN fn,Mat A,Vec v)
Logically Collective
Input Parameters
|  | fn | - the math function context | 
|  | A | - matrix on which the function must be evaluated | 
Output Parameter
|  | v | - vector to hold the first column of f(A) | 
Notes
This operation is similar to FNEvaluateFunctionMat() but returns only
the first column of f(A), hence saving computations in most cases.
See Also
 FNEvaluateFunction(), FNEvaluateFunctionMat(), FNSetMethod()
Level
advanced
Location
src/sys/classes/fn/interface/fnbasic.c
Index of all FN routines
Table of Contents for all manual pages
Index of all manual pages