Date of Award
5-2010
Access Type
Open Access Dissertation
Degree Name
Doctor of Philosophy (PhD)
Degree Program
Mathematics
First Advisor
Tom Braden
Second Advisor
Eduardo Cattani
Third Advisor
Paul Gunnells
Subject Categories
Mathematics | Statistics and Probability
Abstract
In this thesis we investigate 1-skeleta and their associated cohomology rings. 1-skeleta arise from the 0- and 1-dimensional orbits of a certain class of manifold admitting a compact torus action and many questions that arise in the theory of 1-skeleta are rooted in the geometry and topology of these manifolds. The three main results of this work are: a lifting result for 1-skeleta (related to extending torus actions on manifolds), a classification result for certain 1-skeleta which have the Morse package (a property of 1-skeleta motivated by Morse theory for manifolds) and two constructions on 1-skeleta which we show preserve the Lefschetz package (a property of 1-skeleta motivated by the hard Lefschetz theorem in algebraic geometry). A corollary of this last result is a conceptual proof (applicable in certain cases) of the fact that the coinvariant ring of a finite reflection group has the strong Lefschetz property.
Recommended Citation
McDaniel, Chris Ray, "Geometric and Combinatorial Aspects of 1-Skeleta" (2010). Open Access Dissertations. 250.
https://scholarworks.umass.edu/open_access_dissertations/250