TY - JOUR AU - Ojeda, Ignacio AU - Vigneron Tenorio, Alberto PY - 2017 SN - 1755-1633 UR - http://uvadoc.uva.es/handle/10324/40726 AB - This work generalises the short resolution given by Pisón Casares [‘The short resolution of a lattice ideal’, Proc. Amer. Math. Soc. 131(4) (2003), 1081–1091] to any affine semigroup. We give a characterisation of Apéry sets which provides a simple... LA - eng PB - Cambridge University Press KW - Free resolutions KW - Resoluciones libres KW - Betti number KW - Número de Betti KW - Affine semigroups KW - Semigrupos afines TI - The short resolution of a semigroup algebra DO - 10.1017/S0004972717000612 ER -