Mathematics – Group Theory
Scientific paper
2007-01-09
Mathematics
Group Theory
32 pages. Version 2 has a new format that includes less repetition. It also proves a slightly stronger result; with the additi
Scientific paper
Suppose that a group $G$ has socle $L$ a simple large-rank classical group. Suppose furthermore that $G$ acts transitively on the set of lines of a linear space $\mathcal{S}$. We prove that, provided $L$ has dimension at least 25, then $G$ acts transitively on the set of flags of $\mathcal{S}$ and hence the action is known. For particular families of classical groups our results hold for dimension smaller than 25. The group theoretic methods used to prove the result (described in Section 3) are robust and general and are likely to have wider application in the study of almost simple groups acting on finite linear spaces.
Camina Alan R.
Gill Nick
Zalesski Alexandre E.
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