The fractional map by two and the parent map of numerical semigroups (Algebraic Systems and Theoretical Computer Science)
Jiryo Komeda · Institutional Repositories DataBase (IRDB) · 2012
We consider the two kinds of maps between numerical semigroups.One sends a numerical semigroup to the one whose genus is decreased by 1.The other is the quotient map by two.We investigate Weierstrass (reps.non-Weierstrass) numerical semigroups whose images by the two maps are Weierstrass(reps.non-Weierstrass).