Oswaldo Rio Branco de Oliveira

Available identifiers

Publication	Date of Publication	Type
Changes of variable for the Riemann integral on the real line	2024-10-18	Paper
The exponential matrix: an explicit formula by an elementary method	2021-12-03	Paper
The implicit function theorem for maps that are only differentiable: an elementary proof	2018-08-24	Paper
The implicit function theorem when the partial Jacobian matrix is only continuous at the base point	2018-03-12	Paper
The implicit and inverse function theorems: easy proofs	2014-08-05	Paper
A Complex Primitive $N$th Root Of Unity: A Very Elementary Approach	2014-02-17	Paper
The Fundamental Theorem of Algebra: From the Four Basic Operations	2013-05-28	Paper
A formula substituting the undetermined coefficients and the annihilator methods	2013-05-16	Paper
Some Simplifications in Basic Complex Analysis	2012-07-15	Paper
Some Simplifications in the Presentations of Complex Power Series and Unordered Sums	2012-07-05	Paper
The fundamental theorem of algebra: an elementary and direct proof	2011-10-25	Paper

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