FUNCTION: uf_eval - evaluation of a unit form

CALLING SEQUENCE:
uf_eval(q,v)

PARAMETERS:
q - matrix of the unit form
v - a vector

SYNOPSIS:

• uf_eval evaluates the unit form q at the vector v, i.e. it computes the value q(v) = 1/2vqv^T

EXAMPLES:

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

> uf_eval(q,[2,1,1,1,1,0]);

> uf_eval(q,[1,0,0,0,0,1]);