http://hdl.handle.net/10174/699 2026-04-03T20:20:32Z 2026-04-03T20:20:32Z Nunes, Nuno Pereira, Jéssica Chainho Neves, José Soares Fernandes, Sara http://hdl.handle.net/10174/41208 2026-02-16T15:09:34Z 2024-01-01T00:00:00Z

Title: O associativismo popular em Portugal no século XXI Authors: Nunes, Nuno; Pereira, Jéssica Chainho; Neves, José Soares; Fernandes, Sara Editors: Nunes, Nuno; Pereira, Jéssica; Neves, José; Fernandes, Sara Abstract: 0 associativismo popular está presente na vida quotidiana de praticamente todos nós, ainda que o saber acumulado sobre ele não tenha ainda alcançado um patamar de relevância social, cultural, política, económica ou territorial. Este livro pretende, através das perspetivas de analise sociais, diminuir esse hiato e trazer para o grande público associativismo popular português no dealbar do seculo XXI. Ao longo da obra, a realidade associativa e escalpeliza da, principalmente, a partir do grande inquérito nacional ao associativismo popular, a que 112 4 associações responderam. Neste livro, e em boa hora, um largo conjunto de académicos, investigadores, pensadores do associativismo em várias áreas, dispuseram se conhecimento e saber para melhor compreendermos um retrato do presente a pensar no futuro.» .

2024-01-01T00:00:00Z Iarrobino (editor), Anthony Macias Marques (editor), Pedro Rossi (editor), Maria Evelina Vallès (editor), Jean http://hdl.handle.net/10174/38646 2025-06-17T09:36:23Z 2024-01-01T00:00:00Z

Title: Deformation of Artinian Algebras and Jordan Type Authors: Iarrobino (editor), Anthony; Macias Marques (editor), Pedro; Rossi (editor), Maria Evelina; Vallès (editor), Jean Abstract: There are lots of papers devoted to the study of Artinian algebras or zero-dimensional singularities. The motivations come from different areas of Mathematics as Commutative Algebra, Algebraic Geometry, Singularity theory and Combinatorics. In the last years the interest is even increasing due to several open problems on the topic. Hence in July 18-22, 2022, a group of mathematicians from all over the world gathered for a special session on Deformation of Artinian Algebras and Jordan Type at the AMS-EMS-SMF joint international meeting in Grenoble, France. The session was organized by Anthony Iarrobino, Pedro Macias Marques, Maria Evelina Rossi and Jean Vallès.

2024-01-01T00:00:00Z Minhós, Feliz de Sousa, Robert http://hdl.handle.net/10174/32977 2022-12-29T15:59:59Z 2022-04-30T23:00:00Z

Title: Nonlinear higher order differential and integral coupled systems: Impulsive and Integral Equations on Bounded and Unbounded Domains Authors: Minhós, Feliz; de Sousa, Robert Abstract: Boundary value problems on bounded or unbounded intervals, involving two or more coupled systems of nonlinear differential and integral equations with full nonlinearities, are scarce in the literature. The present work by the authors desires to fill this gap. The systems covered here include differential and integral equations of Hammerstein-type with boundary constraints, on bounded or unbounded intervals. These are presented in several forms and conditions (three points, mixed, with functional dependence, homoclinic and heteroclinic, amongst others). This would be the first time that differential and integral coupled systems are studied systematically.

2022-04-30T23:00:00Z Dinis, Bruno Berg, Imme van den http://hdl.handle.net/10174/31526 2022-03-29T15:07:42Z 2019-01-01T00:00:00Z

Title: Neutrices and External Numbers A Flexible Number System Authors: Dinis, Bruno; Berg, Imme van den Abstract: Neutrices and External Numbers: A Flexible Number System introduces a new model of orders of magnitude and of error analysis, with particular emphasis on behaviour under algebraic operations. The model is formulated in terms of scalar neutrices and external numbers, in the form of an extension of the nonstandard set of real numbers. Many illustrative examples are given. The book starts with detailed presentation of the algebraic structure of external numbers, then deals with the generalized Dedekind completeness property, applications in analysis, domains of validity of approximations of solutions of differential equations, particularly singular perturbations. Finally, it describes the family of algebraic laws characterizing the practice of calculations with external numbers.

2019-01-01T00:00:00Z