TY - GEN AU - Moreno Frías, María Ángeles AU - Rosales, José Carlos A4 - Matemáticas PY - 2021 SN - 2073-8994 UR - http://hdl.handle.net/10498/25138 AB - Let S and T be two numerical semigroups. We say that T is an I(S)-semigroup if T\{0} is an ideal of S. Given k a positive integer, we denote by Delta(k) the symmetric numerical semigroup generated by {2,2k+1}. In this paper we present a formula which... LA - eng PB - MDPI KW - numerical semigroup KW - symmetric numerical semigroup KW - ideal KW - I(S)-semigroup KW - genus TI - Counting the Ideals with a Given Genus of a Numerical Semigroup with Multiplicity Two DO - 10.3390/sym13050794 ER -