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- W638268410 abstract "The fractal geometry is a relatively new branch of mathematics that studies complex objects of non-integer dimensions. It finds applications in many branches of science as objects of such complex structure often poses interesting properties. In 1988 Barnsley presented the Iterative Func-tion System (IFS) model that allows modelling complex fractal shapes with only a limited set of contractive transformations. Later many other models were based on the IFS model such as Language-Restricted IFS,Projective IFS, Controlled IFS and Boundary Controlled IFS. The lastto allow modelling complex shapes with control points and specific topol-ogy. These models cover classical geometric models such as B-splines and subdivision surfaces as well as fractal shapes.This thesis focuses on the analysis of the differential behaviour of the shapes described with Controlled IFS and Boundary Controlled IFS. Wederive the necessary and sufficient conditions for differentiability for ev-erywhere dense set of points. Our study is based on the study of the eigenvalues and eigenvectors of the transformations composing the IFS. We apply the obtained conditions to modelling curves in surfaces. We describe different examples of differential behaviour presented in shapes modelled with Controlled IFS and Boundary Controlled IFS. We also use the Boundary Controlled IFS to solve the problem of connecting different subdivision schemes. We construct a junction between Doo-Sabin and Catmull-Clark subdivision surfaces and analyse the differential behaviour of the intermediate surface" @default.
- W638268410 created "2016-06-24" @default.
- W638268410 creator A5085651048 @default.
- W638268410 date "2013-12-20" @default.
- W638268410 modified "2023-09-23" @default.
- W638268410 title "Espaces tangents pour les formes auto-similaires" @default.
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- W638268410 hasPublicationYear "2013" @default.
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