We investigate Gröbner bases of contraction ideals under monomial homomorphisms. As an application, we generalize the result of Aoki–Hibi–Ohsugi– Takemura and Ohsugi–Hibi for toric ideals of nested configurations.

O presente trabalho apresenta uma análise comparativa para verificação de capacidade carga pelos métodos Aoki-Velloso e Décourt-Quaresma. estudo possui em seu escopo as equações ambos os que serão tratados, todos valores obtidos com uso das mesmas.

We propose a perturbation method for determining the (largest) group of invariance of a toric ideal defined in Aoki and Takemura [2008a]. In the perturbation method, we investigate how a generic element in the row space of the configuration defining a toric ideal is mapped by a permutation of the indeterminates. Compared to the proof in Aoki and Takemura [2008a] which was based on stabilizers o...