Zita Abreu 

Guidelines for creating MDS convolutional codes with good column distances

Paulo Almeida

On exponential diophantine equations related to $\alpha$-perfect numbers

Enide Andrade

Combinatorial Fiedler Theory and Graph Partition

António Caetano

On acoustic scattering by attractors of iterated function systems

Marco André da Silva Costa

State-space models with stationary state process-data assimilation approach and modeling challenges

Vasco Costa

Challenges in Combining Aquaculture with Industry 4.0

Luís Descalço

Pré-Cálculo at MATEAS/UA

Juan Diaz

Multiple orthogonality and applications

Rodrigo Domingues 

Phase retrieval of quaternionic signals 

Rui Duarte 

Conic Sections and Quadratic Surfaces in GeoGebra 

Rita Guerra

Uncertainty principles for q-operators

Maria Cristina Souto de Miranda

Robust estimators of the extremal index - an illustration with real data

Jordan Nicoules 

An introduction to the Kadath library

Hector Olivares

Simulating black hole environments

Sandra Pinelas

Impulsive Differential Equations

Hélder Pinto

A História da Matemática na formação e na prática profissional dos professores portugueses

Alexander Plakhov

Rotating rod and ball

Cristiana J. Silva

Biomath contribution on modelling and estimation of COVID-19 active cases

Tatiana Tchemisova e António Iglesias 

A Numerical Approach for the Aircraft Deconfliction Problem with Speed Regulation

Nelson Vieira

On activation functions of hypergeometric type in CNN

João Xarez

Generalization to $n$-categories of the monotone-light factorization for categories via preorders