Computing the generators of the singular locus of the monomial part
with respect to a given threshold.
- E, a, IND
- the corresponding members of a basic object and its
chart (see section *, and *).
- a rational value 0 <= r < 1.
- a list of polynomials generating the the points of the
zero set of the monomial part, represented by E and
a, which are at least of order 1-r.