FUNCTION: uf_critvectors - compute critical vectors for a unit form

CALLING SEQUENCE:
uf_critvectors(q)

PARAMETERS:
q - matrix of the unit form

SYNOPSIS:

• The function computes all critical vectors of a unit form.

• The function returns a list of roots as a vector, in which the entries are critical vectors.

EXAMPLES:

> q:=uf_init([2,[1,2,-2]]);

> uf_critvectors(q);

> q:=uf_init([6,[1,2],[1,3],[1,4],[1,5],[1,6,2],[6,2],[6,3],[6,4],[6,5]]);

> r:=uf_critvectors(q);

> uf_eval(q,r[1]);