glever(1)

NAME
glever - inverse of matrix pencil

CALLING SEQUENCE
[Bfs,Bis,chis]=glever(E,A [,s])

PARAMETERS

E, A
    : two real square matrices of same dimensions

s   : character string (default value 's')

Bfs,Bis
    : two polynomial matrices

chis
    : polynomial

DESCRIPTION
Computation of (s*E-A)^-1
 by generalized Leverrier's algorithm for a matrix pencil.
(s*E-A)^-1 = (Bfs/chis) - Bis.
chis = characteristic polynomial (up to a multiplicative constant).

Bfs = numerator polynomial matrix.

Bis = polynomial matrix ( - expansion of (s*E-A)^-1 at infinity).

Note the - sign before Bis.

Caution
This function uses cleanp to simplify Bfs,Bis and chis.

AUTHOR
F. D. (1988)

SEE ALSO
shuffle, determ, invr, coffg, pencan, penlaur