(FUNDAMENTAL AND APPLIED MATHEMATICS)

2002, VOLUME 8, NUMBER 1, PAGES 117-127

## On pseudogeometrical graphs for some partial geometries

A. A. Makhnev

Abstract

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It is shown that a pseudogeometrical graph G for $GQ\left(4,12\right)$, containing a $49$-coclique $\mathcal O$, is a point graph of generalized quadrangle. Furthermore, the subgraph $\Gamma - \mathcal O$ is strongly regular with parameters $\left(196,39,2,9\right)$. It is proved that a pseudogeometrical graph for partial geometry $pG$2(5,32) is locally a $GQ\left(4,8\right)$-graph.

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