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The Elementary Divisors of the Incidence Matrix of Skew Lines in PG(3,q)

By Andries E. Brouwer, Joshua E. Ducey and Peter Sin

Abstract

The elementary divisors of the incidence matrix of lines in PG(3,q) are computed, where two lines are incident if and only if they are skew.Comment: 13 pages. The results of this paper supersede those in the paper arXiv:math/1001.2551 V2. Minor correction

Topics: Mathematics - Combinatorics, Mathematics - Group Theory, 05B20, 05E30 (Primary) 20C33, 51E20 (Secondary)
Year: 2011
OAI identifier: oai:arXiv.org:1103.0062
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