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Computing the singular locus of a WBO. The difference between this
procedure and ``desing/sing`` is that in case
of a WBO the monomial parts are also to be considered in the singular
locus computation. This leads to a combinatorial approach which
determines the singular locus of the WBO as union of intersections of
hypersurfaces that correspond to partial derivatives up to a certain
order, from the proper and the monomial part of the ideal of the WBO.

**Input:**-
**J, N, E, a, c, C, S, IND, DEP, PDER**- the corresponding members of a WBO and its chart (see section *, and *).

**Output:**- a list of polynomials generating the ideal of the singular locus of the WBO.