Home > p2plib > xinorm.m

xinorm

PURPOSE

compute xi-norm of z

SYNOPSIS

function xin=xinorm(z,xi)

DESCRIPTION

 compute xi-norm of z

CROSS-REFERENCE INFORMATION

This function calls:

This function is called by:

bifdetec Check for change of sign(det(A)). If yes, locate bif-point and save.
cont main cont. routine for -div(c grad u)+au-f-b grad u=0,
inistep initial step in cont; yields first 2 points on branch and first tangent
meshadac adapt mesh after Coarsening, i.e. first interpol to (coarse) standard-mesh, then adapt
meshref adapt (i.e., refine locally) mesh
newmesh build new mesh and interpolate (u,tau) to it
pmcont parallel multi continuation routine
swibra load data from file pre/fname and attempt branch switch,

SOURCE CODE

0001 function xin=xinorm(z,xi)
0002 % compute xi-norm of z
0003 len=length(z); ul2=norm(z(1:len-1)); lamd=z(len); 
0004 xin=sqrt(xi*ul2^2+(1-xi)*lamd^2);