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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

[pt] CÁUSTICAS DE WIGNER E CONJUNTOS DE MEDIDA DE LARGURA CONSTANTE EM PLANOS NORMADOS COM BOLAS UNITÁRIAS SUAVES OU POLIGONAIS / [en] WIGNER CAUSTICS AND CONSTANT WIDTH MEASURE SETS IN NORMED PLANES WITH SMOOTH OR POLYGONAL UNIT BALLS

RAFAEL SEGADAS DOS SANTOS 06 May 2020 (has links)
[pt] Em [23] são apresentadas igualdades e desigualdades isoperimétricas relacionadas à Cáustica de Wigner (CW) e ao Conjunto de Medida de Largura Constante (CMLC). Neste trabalho nós estendemos estes resultados para planos normados com bolas unitárias quadraticamente convexas ou bolas unitárias poligonais. Estes conjuntos CW e CMLC estão fortemente relacionados às ciclóides, que são curvas cujas funções suporte generalizam a base de Fourier ( [6], [7]). Uma característica importante deste trabalho é a analogia direta entre os casos contínuo e discreto. / [en] In [23], some isoperimetric equalities and inequalities related to the Wigner Caustic (WC) and the Constant Width Measure Set (CWMS) are proved. In this work, we generalize these results to normed planes with quadratically convex unitary ball or polygonal unitary balls. The WC and CWMS are closely related to cycloids, which are curves whose support functions generalize the Fourier basis ( [6], [7]). An important aspect of our work is the direct analogy between the smooth and discrete cases.

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