Order of Eigenvalues - new attempt

Adri van der Meer — Fri, 13 May 2011 14:03:20 Z

Of course this is possible, but no very easy.

Use the option output=list:

with(LinearAlgebra):
A := <a11,-a11,a13; 0,0,0; 0,0,0>;
eig := Eigenvectors(A, output=list);

s := sort( eig, (x,y)->type(x[1],symbol) ); # if you want the nonzero element(s) first
s := sort( eig, (x,y)->x[1]=0 ); # if yoy want the zero(s) first
V := Matrix( map( op, s[1..2,3] ) ); # the matrix of eigenvectors

works

PatrickT — Mon, 16 May 2011 11:37:04 Z

oh this is very useful thanks!

MaplePrimes - answers and comments on Question, Order of eigenvalues in LinearAlgebra:-Eigenvectors

Order of Eigenvalues - new attempt

works