1/2018 |
The Generic Unfolding of a Codimension-Two Connection to a Two-Fold Singularity of Planar Filippov Systems Douglas D. Novaes, Marco A. Teixeira, Iris O. Zeli Generic bifurcation theory was classically well developed for smooth differential systems, establishing results for k-parameter families of planar vector rp-2018-01.pdf |

16/2017 |
An Alphabetical Approach to Nivat´s Conjecture Colle, C. F., Garibaldi, E. Abstract rp-2017-16.pdf |

15/2017 |
On Maximal Curves Related to Chebyshev Polynomials Ahmad Kazemifard, Saeed Tafazolian, Fernando Torres We study maximal curves arising from Chebyshev polynomials, where in particular some results from Garcia-Stichtenoth [4] are revisited and generalized. rp-2017-15.pdf |

14/2017 |
Grüss-type Inequality by Means of a Fractional Integral J. Vanterler da C. Sousa, D. S. Oliveira, E. Capelas de Oliveira We use a fractional integral recently proposed to establish a generalization rp-2017-14.pdf |

13/2017 |
On a Caputo-type Fractional Derivative D.S. Oliveira, E. Capelas de Oliveira In this work we present a new dierential operator of arbitrary order dened rp-2017-13.pdf |

12/2017 |
Bayesian Inference for Zero-and/or-one Augmented Rectangular Beta Regression Models Ana R.S. Santos, Caio L. N. Azevedo, Jorge L. Bazan, Juvêncio S. Nobre In this paper, we developed a Bayesian inference for a zero-and/orone augmented rectangular beta regression model to analyze limitedaugmented data, under the presence of outliers. The proposed Bayesian tools were parameter estimation, model t assessment, model comparison, residual analysis and case in uence diagnostics, developed through rp-2017-12.pdf |

11/2017 |
Fp2 - Maximal Curves with Many Automorphisms are Galois-Covered by the Hermitian Curve Daniele Bartoli, Maria Montanucci , Fernando Torres Let F be the finite field of order q2, q = ph with p prime. It is commonly rp-2017-11.pdf |

10/2017 |
Generalized Weierstrass Semigroups and their Poincaré Series J. J. Moyano-Fernández, W. Tenório , F. Torres We investigate the structure of the generalized Weierstraß semigroups at several points on a curve defined over a finite field. We present a description of these rp-2017-10.pdf |

9/2017 |
Zero-one Augmented Beta and Zero Inflated Discrete Models with Heterogeneous Dispersion: An Application to Students’ Academic Performance Hildete P. Pinheiro, Rafael P. Maia, Eufrásio A. Lima-Neto, Mariana Rodrigues-Motta The purpose of this work is to present suitable statistical methods to study the performance of undergraduate students based on the incidence/proportion of failed courses. Some approaches are considered: in one of them the incidence of failed courses is modeled using zero in ated discrete distributions with heteroscedasticity, considering rp-2017-09.pdf |

8/2017 |
Multidimensional Multiple Group IRT Models with Skew Normal Latent Trait Distributions Juan L. Padilla, Caio L. N. Azevedo, Victor H. Lachos Item response theory (IRT) models are one of the most important statistical tools for psychometric data analysis. Their applicability goes from educational rp-2017-08.pdf |

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