Nonabelian Multiplicative Integration On Surfaces - Amnon Yekutieli

Nonabelian Multiplicative Integration On Surfaces

By Amnon Yekutieli

  • Release Date: 2015-07-16
  • Genre: Mathematics
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Nonabelian multiplicative integration on curves is a classical theory. This volume is about the 2-dimensional case, which is much more difficult. In our construction, the setup is a Lie crossed module: there is a Lie group H, together with an action on it by another Lie group G. The multiplicative integral is an element of H, and it is the limit of Riemann products. Each Riemann product involves a fractal decomposition of the surface into kites (triangles with strings connecting them to the base point). There is a twisting of the integrand, that comes from a 1-dimensional multiplicative integral along the strings, with values in the group G.

The main result of this work is the 3-dimensional nonabelian Stokes theorem. This result is new; only a special case of it was predicted (without proof) in papers in mathematical physics. Our constructions and proofs are of a straightforward nature. There are plenty of illustrations to clarify the geometric constructions.

Our volume touches on some of the central issues (e.g., descent for nonabelian gerbes) in an unusually down-to-earth manner, involving analysis, differential geometry, combinatorics and Lie theory — instead of the 2-categories and 2-functors that other authors prefer.
Contents:IntroductionPolyhedra and Piecewise Smooth GeometryEstimates for the Nonabelian Exponential MapMultiplicative Integration in Dimension OneMultiplicative Integration in Dimension TwoQuasi Crossed Modules and Additive FeedbackStokes Theorem in Dimension TwoSquare PuzzlesStokes Theorem in Dimension ThreeMultiplicative Integration on Triangular Kites
Readership: Graduate students, algebraic topologists, mathematical physicists and theoretical physicists.
Key Features:The author is an expert on algebraic geometry and deformation quantization. In this volume, he takes a journey into another area of mathematics (differential geometry), and the result of this journey is a collection of original and deep constructions and theoremsThe volume contains an unusually detailed study of the nonabelian exponential map and of piecewise smooth differential formsThe volume includes an edited version of lecture notes on the subject, that provides a quick and lucid overview of the main features

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