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math.AC2015
Counting Square free Cremona monomial maps
Barbara Costa, Thiago Dias, Rodrigo Gondim
We use combinatorics tools to reobtain the classification of monomial quadratic Cremona transformations in any number of variables given in \cite{SV2} and to classify and count squ…
math.AC2015
On higher Hessians and the Lefschetz properties
Rodrigo Gondim
We deal with a generalization of a Theorem of P. Gordan and M. Noether on hypersurfaces with vanishing (first) Hessian. We prove that for any given , and $2\leq…