Algorithm for computing the moduli space of pointed Gorenstein curves with Weierstrass gap sequence 1,2,…,g−2,λ,2g−3

An algorithm for computing the moduli space of pointed Gorenstein curves with Weierstrass gap sequence 1,2,…,g−2,λ,2g−3, where 3g−5<2λ<4g−8 and g 6, is given. This algorithm consists in deforming a nonreduced reducible canonical curve by the method of Stöhr.