2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/63868Let I be the toric ideal defined by a 2 x n matrix of integers, A = ((1 1 ... 1)(a_1 a_2 ... a_n)) with a_1<a_2<...<a_n. We give a combinatorial proof that I is generated by elements of degree at most the sum of the two largest differences a_i - a_(i-1). The novelty is in the method of proof: the result has already been shown by L'vovsky using cohomological arguments.8 pages. To appear in Collectanea MathematicaCommutative AlgebraAlgebraic Geometry13F20 (Primary) 14M25, 05A17 (Secondary)text