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Palestras

As palestras da edição de 2016 podem ser consultadas aqui.

FORMAS E (DE)FORMAS
por André Oliveira (CMUP & UTAD)

Resumo: Imagina que tens um objeto geométrico absolutamente elástico, que o podes deformar ou moldar de qualquer maneira que te apeteça (esticando, rodando, torcendo, encolhendo,…), mas que não o podes cortar ou colar. Será que com essas deformações consegues obter qualquer outro objeto que consideres? Quando é que tal é possível? E como saber quando tal é impossível? Estas são questões que se estudam no ramo da Matemática chamado de Topologia, uma espécie de Geometria “elástica”.

Nesta palestra vamos entrar um pouco pelo mundo da Topologia, conhecendo alguns objetos geométricos com propriedades curiosas, fazendo algumas experiências e  conhecendo alguns dos chamados invariantes topológicos, que nos ajudam a responder às questões acima colocadas.


SIMETRIA, TOPOLOGIA E NÚMEROS QUÂNTICOS
por João Lopes dos Santos (Departamento de Física e Astronomia, FCUP)

Resumo: O primeiro contacto com os números quânticos surge na caracterização dos estados atómicos. A sua definição está intimamente relacionada com o conceito de simetria, a ver a simetria de rotação.

Mas existe uma outra origem para o aparecimento de números quânticos na Física, a Topologia. O prémio Nobel de 2016, atribuído a Mike Kosterlitz, David Thouless e Duncan Haldane, reconheceu a importância de "descobertas teóricas de transições de fase topológicas, e de fases topológicas da matéria".

Nesta palestra vou tentar partilhar, de modo mais simples possível, algumas ideias que mostram a importância crescente da topologia em Física.


ESQUISSOS DE ARTE E GEOMETRIA
por Eliana Manuel Pinho (TARDOZ—estudos independentes)

Resumo: Paul Klee (1879-1940), um dos pintores mais importantes do séc. XX, é professor na Bauhaus a partir de 1921. Esta escola artística explora, durante a sua curta vida (1919-1933), abordagens racionalistas e ferramentas abstractas da geometria. Parte das notas que Klee vai tomando para as suas aulas são publicadas em livro, em 1925, com o título “Esquissos Pedagógicos”, uma obra muito interessante que apresenta um sistema de criação artística a partir de um conjunto de elementos, incluindo objectos geométricos, linguagens de representação ou princípios físicos. O livro de Klee não é um caso isolado, vários professores da Bauhaus reflectem e produzem textos acerca de sistemas de composição com conteúdo geométrico. Nesta palestra vamos apresentar os “Esquissos Pedagógicos” de Paul Klee e o contexto da Bauhaus.


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