TY - GEN AU - Moreno Frías, María Ángeles AU - Nicola, J. AU - Pardo Espino, Enrique A4 - Matemáticas PY - 2007 SN - 0092-7872 UR - http://hdl.handle.net/10498/16088 AB - In this article we prove that if S is an irreducible numerical semigroup and S is generated by an interval or S has multiplicity 3 or 4, then it enjoys Toms decomposition. We also prove that if a numerical semigroup can be expressed as an expansion of... LA - eng TI - Irreducible numerical semigroups having Toms decomposition DO - 10.1080/00927870601052505 ER -