## 2007.25: Torus Actions and their Applications in Topology and Combinatorics

2007.25:
Victor Buchstaber and Taras Panov
(2002)
*Torus Actions and their Applications in Topology and Combinatorics.*
University Lecture Series number 24; OUP.
American Mathematical Society.
ISBN 10: 0-8218-3186-0

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## Abstract

Here, the study of torus actions on topological spaces is presented as a bridge connecting combinatorial and convex geometry with commutative and homological algebra, algebraic geometry, and topology. This established link helps in understanding the geometry and topology of a space with torus action by studying the combinatorics of the space of orbits. Conversely, subtle properties of a combinatorial object can be realized by interpreting it as the orbit structure for a proper manifold or as a complex acted on by a torus. The latter can be a symplectic manifold with Hamiltonian torus action, a toric variety or manifold, a subspace arrangement complement, etc., while the combinatorial objects include simplicial and cubical complexes, polytopes, and arrangements. This approach also provides a natural topological interpretation in terms of torus actions of many constructions from commutative and homological algebra used in combinatorics. The exposition centers around the theory of moment-angle complexes, providing an effective way to study invariants of triangulations by methods of equivariant topology. The book includes many new and well-known open problems and would be suitable as a textbook. It will be useful for specialists both in topology and in combinatorics and will help to establish even tighter connections between the subjects involved.

Item Type: | Book |
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Subjects: | MSC 2000 > 55 Algebraic topology |

MIMS number: | 2007.25 |

Deposited By: | Miss Louise Stait |

Deposited On: | 23 March 2007 |

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