Publications
Publicações

Publications

A real-time intelligent system based on machine-learning methods for improving communication in sign language

IEEE Access | 2025

Victor Leiva

Muhammad Rahman

Muhammad Akbar

Mauricio Huerta

Muhammad Riaz

DOI

A Study of the Symmetry of the Tricomplex Repunit Sequence with Repunit Sequence

E.A. Costa

D.C. Santos

DOI

On t-Dimensional Gersenne Sequences and Their Symmetry Properties

Douglas Santos

Eudes Costa

DOI

On tridimensional Lucas-balancing numbers and some properties

Notes on Number Theory and Discrete Mathematics | 2025

M. Otero-Espinar

DOI

On Gersenne Sequence: A Study of One Family in the Horadam-Type Sequence

Douglas Santos

Eudes Costa

DOI

Positive topological entropy for semi-Riemannian geodesic flows

Proceedings of the American Mathematical Society | 2025

Mário Bessa

João Lopes Dias

Pedro Matias

DOI

Using GeoGebra as a tool for teaching the Padovan board and tiling

Renata Vieira

Francisco Alves

DOI

Green Exchange-Traded Fund Performance Evaluation Using the EU–EV Risk Model

José Azevedo

Ana Azevedo

DOI

Neural Chronos ODE: Modelling bidirectional temporal patterns in time-series data

Expert Systems with Applications | 2025
DOI

Bivariate extended skew-elliptical Heckman models: mathematical characterization and an application in economic sciences

Computational and Applied Mathematics | 2025

Roberto Vila

Helton Saulo

Carolina Marchant

Victor Leiva

DOI

A Brief Study on the k-Dimensional Repunit Sequence

Eudes Costa

Francisco Alves

DOI

Numerical Methods: Artifacts in Teaching in a Mathematics Degree

Edson Cruz

Maria Nascimento

DOI

Abordagem prática para a utilização do software octave: transferência de calor por condução unidimensional em regime transiente

Caires Sassupe

Armando Soares

Manuel Reis

DOI

Clustering and Risk Analysis for Evaluating the Water Quality of a Hydrological Basin

Ana Pedra

DOI

A note on the generalized bi-periodic Lucas-balancing numbers

Eudes Costa

Elen Spreafico

DOI

Total time on test-based goodness-of-fit statistics for the reciprocal property in fatigue-life models

Lifetime Data Analysis | 2025

Marta Azevedo

Victor Leiva

DOI

The logical essence of call-by-name CPS translations

DOI

A study of the Ganea conjecture for topological complexity by using weak topological complexity

Mathematical Proceedings of the Cambridge Philosophical Society | 2024

J. Garcia-Calcines

DOI

On a Matrix Formulation of the Sequence of Bi-Periodic Fibonacci Numbers

Mustapha Rachidi

Elen Spreafico

DOI

Neural Fractional Differential Equations: Optimising the Order of the Fractional Derivative

Fractal and Fractional | 2024
DOI

Uma nota sobre a sequência de Tetrarrin

Renata Vieira

Francisco Alves

DOI

LIE GROUPS WITH ALL LEFT-INVARIANT SEMI-RIEMANNIAN METRICS COMPLETE

Transactions of the American Mathematical Society | 2024

A. Elshafei

M. Sánchez

A. Zeghib

DOI

On the Leonardo quaternions sequence

Patrícia Beites

DOI

A correction on the paper “A Note on Bi-Periodic Leonardo Sequence”

E.V.P. Spreafico

DOI

A six-compartment model for COVID-19 with transmission dynamics and public health strategies

Scientific Reports | 2024

Venkatesh Ambalarajan

Ankamma Mallela

Vinoth Sivakumar

Prasantha Dhandapani

Victor Leiva

Carlos Martin-Barreiro

DOI

Existence and exponential stability of a periodic solution of an infinite delay differential system with applications to Cohen–Grossberg neural networks

Communications in Nonlinear Science and Numerical Simulation | 2024

A. Elmwafy

César Silva

DOI

On Appell-Vietoris Polynomials

Isabel Cação

Helmuth Malonek

Graça Tomaz

DOI

Extensão da sequência de Leonardo: Tetra-Leonardo, Penta-Leonardo e Hexa-Leonardo

Renata Vieira

Francisco Alves

DOI

Tricomplex Fibonacci Numbers: A New Family of Fibonacci-Type Sequences

Eudes Costa

Francival Monteiro

Vitor Souza

Douglas Santos

DOI

Classification of Real-World Objects Using Supervised ML-Assisted Polarimetry: Cost/Benefit Analysis

Filipe Oliveira

Nazar Romanyshyn

Irene Estevez

Joel Borges

Stéphane Clain

Mikhail Vasilevskiy

DOI

Predicting COVID-19 mortality using statistical, machine learning and fuzzy classification methods: insights from a Portuguese cohort study

Signa Vitae | 2024

Victor Leiva

Pedro Cunha

Muhammad Akbar

Individual Water Consumption Forecasting: Evaluating SARIMA and TBATS Methods

Tatiana Cunha

Eliana Silva

DOI

The Zeros of Quadratic Coquaternionic Polynomials Revisited

Ricardo Severino

DOI

Risk assessment for the surface water quality evaluation of a hydrological basin

Stochastic Environmental Research and Risk Assessment | 2024

Ana Pedra

DOI

A Hybrid Fuzzy Mathematical Programming Approach for Manufacturing Inventory Models with Partial Trade Credit Policy and Reliability

Axioms | 2024

Prasantha Dhandapani

Kalaiarasi Kalaichelvan

Victor Leiva

Soundaria Ramalingam

DOI

Systems of quaternionic linear matrix equations: solution, computation, algorithm, and applications

AIMS Mathematics | 2024

Abdur Rehman

Muhammad Rahman

Asim Ghaffar

Carlos Martin-Barreiro

Victor Leiva

Xavier Cabezas

DOI

RESULTS OF QUBISM 3D MODELING AND GEOGEBRA IN PROMOTING SPATIAL VISUALIZATION

Cacilda Chivai

Armando Soares

K-Means Clustering Approach for Stock Risk Assessment and Portfolio Construction: A Case Study Based on the EU-EV Risk Model

DOI

Hermite-Hadamard inequalities for quantum integrals: A unified approach

Applied Mathematics and Computation | 2024

Enas Shehata

DOI

Symmetry and Complexity in Gene Association Networks Using the Generalized Correlation Coefficient

Symmetry | 2024

Raydonal Ospina

Cleber Xavier

Gustavo Esteves

Patrícia Espinheira

Victor Leiva

DOI

New Statistical Residuals for Regression Models in the Exponential Family: Characterization, Simulation, Computation, and Applications

Mathematics | 2024

Raydonal Ospina

Patrícia Espinheira

Leilo Arias

Cleber Xavier

Victor Leiva

DOI

The (B, C)-Core inverse of rectangular matrices

Quaestiones Mathematicae | 2024

H. Zhu

D. Xu

D. Mosić

DOI

Kinetic models leading to pattern formation in the response of the immune system

Riv. Mat. Univ. Parma | 2024

Romina Travaglini

João Miguel Oliveira

Topological insights into gait for Parkinsonism differentiation

IX Workshop on Computational Data Analysis and Numerical Methods (WCDANM) 2024 | 2024

Wolfram Erlhagen

Miguel Gago

Estela Bicho

Partial Proof Terms in the Study of Idealized Proof Search

Ana Sousa

DOI

Articulação entre Sequências Recursivas e teoria dos Grupos Finitos

Renata Sousa

Renata Vieira

Francisco Alves

Ana Aires

DOI

A Dynamic Neural Field Approach for Intelligent Cockpits: Online Learning and Prediction of Traveling Routines

Pedro Guimaraes

Weronika Wojtak

Paulo Barbosa

Sergio Monteiro

Estela Bicho

DOI

On the Incomplete Edouard and Incomplete Edouard–Lucas Numbers

Elen Spreafico

Eudes Costa

DOI