STNorm

Computes de norm of a vector as the square root of the inner product (x,x) as defined by STInnerProduct().

Synopsis

#include "slepcst.h" 
PetscErrorCode STNorm(ST st,Vec x,PetscReal *norm)
Collective on ST and Vec

Input Parameters

st - the spectral transformation context
x - input vector

Output Parameter

norm - the computed norm

Notes

This function will usually compute the 2-norm of a vector, ||x||_2. But this behaviour may be different if using a non-standard inner product changed via STSetBilinearForm(). For example, if using the B-inner product for positive definite B, (x,y)_B=y^H Bx, then the computed norm is ||x||_B = sqrt( x^H Bx ).

See Also

STInnerProduct()

Location: src/st/interface/stsolve.c
Index of all ST routines
Table of Contents for all manual pages
Index of all manual pages