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This thesis consists of an introduction and five research papers on topics related to conformal mapping, the Loewner equation and its applications, and Bergman-type spaces of holomorphic functions. The first two papers are devoted to the study of integral means of derivatives of conformal mappings. In Paper I, we present improved upper estimates of the universal means spectrum of conformal mappingsof the unit disk. These estimates rely on inequalities  obtained by Hedenmalm and Shimorin using Bergman space techniques, and on computer calculations. Paper II is a survey of recent results on the universal means spectrum, with particular emphasis on Bergman spacetechniques.Paper III concerns Bergman-type spaces of holomorphic functions in subsets of $\textbf{C}^d$ and their reproducing kernel functions. By expanding the norm of a function in a Bergman space along the zero variety of a polynomial, we obtain a series expansion of reproducing kernel functions in terms of kernels associated with lower-dimensionalspaces of holomorphic functions. We show how this general approach can be used to explicitly compute kernel functions for certain weighted Bergman and Bargmann-Fock spaces defined in domains in $\textbf{C}^2$.The last two papers contribute to the theory of Loewner chains and theirapplications in the analysis of planar random growth model defined in terms of compositions of conformal maps.In Paper IV, we study Loewner chains generated by unimodular L\'evy processes.We first establish the existence of a capacity scaling limit for the associated growing hulls in terms of whole-plane Loewner chains driven by a time-reversed process. We then analyze the properties of Loewner chains associated with a class of two-parameter compound Poisson processes, and we describe the dependence of the geometric properties of the hulls on the parameters of the driving process. In Paper V, we consider a variation of the Hastings-Levitov growth model, with anisotropic growth. We again establish results concerning scaling limits, when the number of compositions increases and the basic conformal mappings tends to the identity. We show that the resulting limit sets can be associated with solutions to the Loewner equation.We also prove that, in the limit, the evolution of harmonic measure on the boundary is deterministic and is determined by the flow associated with an ordinary differential equation, and we give a description of the fluctuations around this deterministic limit flow. / <p>QC 20100414</p>

This summer Herman Gluck and Weiqing Gu proved the last step in a process that took conformal maps between two complex spaces and related them to Volume Preserving Great Circle Fibrations of S3. These fibrations, which are non-intersecting flows, break down under certain conditions. We obtained the fibrations by applying the process to different conformal maps then calculated the angles where they intersect. This paper centers around the developments in the method for converting the conformal maps and finding the critical angles. Finally, the examples are included in their various stages of completeness.

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[pt] Esta dissertação visa mostrar que a construção de alguns mapas, chamados mapas conformes, pode ser expressa por funções complexas e essa relação será mostrada ao longo do texto. Inicialmente são apresentadas as coordenadas esféricas utilizadas por geógrafos e matemáticos e a construção de um mapeamento da esfera terrestre no plano, projeção estereográfica. Nas seções seguintes, são apresentadas: definições e propriedades das funções complexas com ênfase em suas interpretações geométricas; alguns mapas gerados pelas funções exponencial, logarítmica e trigonométricas complexas; a relação entre função exponencial e o Mapa de Mercator; algumas características de uma função elíptica; a relação entre uma função elíptica e o Mapa Pierce Quincuncial. / [en] This master thesis aims to show that the construction of some maps, called conformal maps, can be expressed by complex functions and this relation will be shown through the text. First it will be presented the spherical coordinates used for geographers and mathematicians, and the construction of a mapping of the terrestrial sphere in the plane, stereographic projection. In the following sections, they are presented: Definitions and properties of complex functions with emphasis on their geometric interpretations; Some maps generated by the exponential, logarithmic and complex trigonometric functions; The relationship between exponential function and the Mercator Map; Some characteristics of an elliptical function; The relationship between an elliptical function and the Quincuncial Pierce Map.