Lefschetz Properties and Basic Constructions on Simplicial Spheres

Details Lefschetz Properties and Basic Constructions on Simplicial Spheres Lefschetz Properties and Basic Constructions on Simplicial Spheres

2008-02-07

arxiv.org/abs/0802.1058v1

Mathematics

Combinatorics

18 pages, no figures

Scientific paper

The well known $g$-conjecture for homology spheres follows from the stronger conjecture that the face ring over the reals of a homology sphere, modulo a linear system of parameters, admits the strong-Lefschetz property. We prove that the strong-Lefschetz property is preserved under the following constructions on homology spheres: join, connected sum, and stellar subdivisions. The last construction is a step towards proving the $g$-conjecture for piecewise-linear spheres.

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