Oswaldo Rio Branco de Oliveira

Oswaldo Rio Branco de Oliveira. The Fundamental Theorem of Algebra: An Elementary and Direct Proof , Mathematical Intelligencer (2011)

Oswaldo Rio Branco de Oliveira. The Fundamental Theorem of Algebra: From the Four Basic Operations , The American Mathematical Monthly, Vol. 119, No. 9 (November 2012)."Copyright the Mathematical Association of America [2012]. All rights reserved."

Oswaldo Rio Branco de Oliveira (2013): A Formula Substituting the Undetermined Coefficients and the Annihilator Methods, International Journal of Mathematical Education in Sciences and Technology, DOI:10.1080/0020739X.2012.714496. Disponível em: http://dx.doi.org/10.1080/0020739X.2012.714496.

Oswaldo Rio Branco de Oliveira. The Implicit and the inverse function theorems: easy proofs , Real Analysis Exchange, vol. 39(1), 2013/2014, pp. 206-218.

Oswaldo Rio Branco de Oliveira. Some simplifications in the presentations of complex power series and unordered sums , arXiv (2012), http://arxiv.org/abs/1207.1472v2.

Oswaldo Rio Branco de Oliveira. Some simplifications in basic complex analysis , arXiv (2012), http://arxiv.org/abs/1207.3553v2.

Oswaldo Rio Branco de Oliveira. The inverse and the implicit function theorems: easy proofs , arXiv (2012), http://arxiv.org/abs/1212.2066v1.

Oswaldo Rio Branco de Oliveira. The implicit function theorem when the matrix $\frac{\partial F}{\partial y}(x,y)$ is only continuous at the base point , arXiv (2013), http://arxiv.org/abs/1312.2445v1.

Oswaldo Rio Branco de Oliveira. A complex primitive Nth root of unity: a very elementary approach , arXiv (2014), http://arxiv.org/abs/1402.4038v1.