FUNCTION: uf_swelling - swelling of a unit form

CALLING SEQUENCE:
uf_swelling(q,i)

PARAMETERS:
q - matrix of the unit form
i - number of point to swell

SYNOPSIS:

• uf_swelling performs the swelling of the unit form q in point i.

EXAMPLES:

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

> q:=uf_swelling(q,1);

> q:=uf_swelling(q,2);