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    • Graduate Studies - Theses and Dissertations (MU)
    • Theses and Dissertations (MU)
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    • 2008 Dissertations (MU)
    • 2008 MU dissertations - Freely available online
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    Sections of complex convex bodies

    Zymonopoulou, Maria-Isavella, 1973-
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    Date
    2008
    Format
    Thesis
    Metadata
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    Abstract
    The main idea of the Fourier analytic approach to sections of convex bodies is to express different parameters of a body in terms of the Fourier transform and then apply methods of Fourier analysis to solve geometric problems. The original Fourier approach applies to convex bodies in Rn [superscript]. This thesis is focused at extending this approach to the complex case, where origin symmetric complex convex bodies are the unit balls of norms in Cn [superscript]. In Chapter 2 we present the solution of the complex Busemann-Petty problem which asks whether bodies with smaller volumes of hyperplane sections necessarily have smaller volumes in Cn [superscript]. We show that the answer is affirmative if n [lesser than] 3 and negative if n [greater than] 4: Since the answer to this problem is negative in most dimensions, it is natural to ask what conditions on the volumes of hyperplane sections imply the same inequality for volumes in all dimensions. We answer this question in Chapter 3. Chapter 4 is dedicated to the study of a generalization of the complex Busemann- Petty problem, where the volume is replaced by any measure. This generalizes the result of Zvavitch in the real case. In chapter 5 we study the extremal sections of complex lp [subscript]-balls by complex hyperplanes for 0 [lesser than] p [greater than] 2: Finally, in Chapter 6, we prove that the complex unit ball, Bp(Cn); of lp [subscript] p [lesser than] 2 is not a [kappa]-intersection body, if [kappa] [lesser than] 2n - 4.
    URI
    http://hdl.handle.net/10355/5528
    Degree
    Ph. D.
    Thesis Department
    Mathematics (MU)
    Part of
    2008 Freely available dissertations (MU)
    Collections
    • Mathematics electronic theses and dissertations (MU)
    • 2008 MU dissertations - Freely available online

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