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math.AT2020
Uma prova elementar da fórmula de Euler usando o método de Cauchy
Jean-Paul Brasselet, Nguyen Thi Bich Thuy
The use of Cauchy's method in proving the well-known Euler formula is an object of many controversies. The purpose of this paper is to prove that the Cauchy's method applies for co…
math.AT2016★ 2 cited
A característica de Euler-Poincaré
Jean Paul Brasselet, Nguyen Thi Bich Thuy
We introduce the Euler-Poincaré's characteristic with an elementary way and historically. We explain also why one should call Descartes-Poincaré characteristic instead of the Euler…