$n$-Harmonic Mappings between Annuli:The Art of Integrating Free Lagrangians(Memoirs of the American Mathematical Society)

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作      者
出版时间
2012年06月30日
装      帧
ISBN
9780821853573
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页      码
105
开      本
26 cm
语      种
英文
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图书简介
The central theme of this paper is the variational analysis of homeomorphisms (h: {mathbb X} overset{text{onto}}{longrightarrow} {mathbb Y}) between two given domains ({mathbb X}, {mathbb Y} subset {mathbb R}^n). The authors look for the extremal mappings in the Sobolev space ({mathscr W}^{1,n}({mathbb X},{mathbb Y})) which minimize the energy integral [[]{mathscr E}_h=int_{{mathbb X}} | Dh(x) |^n, mathrm{d}x,.] Because of the natural connections with quasiconformal mappings this (n)-harmonic alternative to the classical Dirichlet integral (for planar domains) has drawn the attention of researchers in Geometric Function Theory. Explicit analysis is made here for a pair of concentric spherical annuli where many unexpected phenomena about minimal (n)-harmonic mappings are observed. The underlying integration of nonlinear differential forms, called free Lagrangians, becomes truly a work of art.
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