most citedSymmetries of quadratic forms classes and of quadratic surds continued fractions. Part I: A Poincaré model for the de Sitter world

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math.AC2007

Gaps in Nonsymmetric Numerical Semigroups

Leonid G. Fel, Francesca Aicardi

There exist two different sorts of gaps in the nonsymmetric numerical additive semigroups finitely generated by a minimal set of positive integers {d_1,...,d_m}. The h-gaps are spe…