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Omni-directional cameras have many advantages overconventional cameras in that they have a much wider field-of-view (FOV… Expand Omni-directional cameras have many advantages overconventional cameras in that they have a much wider field-of-view (FOV… Expand Geospatial data are gathered through a variety of different methods. The integration and handling of such datasets within a… Expand Given a regular tiling of the torus, we want to depict it on a torus in space with as much conformal symmetry as possible. In… Expand 1. Introduction. The diameter rigidity question considered in this paper is motivated by the rank rigidity problem for spaces of… Expand In this article we generalize both ordinary and permutation volt age constructions to obtain all branched coverings of maps. We… Expand Abstract In this paper we consider spherical polyhedra, or equivalently 3-connected embedded planar graphs. A self-duality map… Expand Abstract In this paper we give simultaneous answers to three questions: (a) When does a plane picture of lines, weaving over and… Expand Abstract For over 100 years there has been a known correspondence between plane pictures of spherical polyhedra and static… Expand Cet article a pour but de presenter un bref compte rendu de recherche de I’auteur dans le domaine de la topologie structurale… Expand