For an irreducible nodal curve with one node, the cohomology ring of the Simpson moduli space of rank 2 semistable sheaves with fixed odd determinant has a minimal set of generators obtained by degenerating Newstead's smooth-curve generators.
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Generators of the cohomology ring, after Newstead
For an irreducible nodal curve with one node, the cohomology ring of the Simpson moduli space of rank 2 semistable sheaves with fixed odd determinant has a minimal set of generators obtained by degenerating Newstead's smooth-curve generators.