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SUSTech

Time: 16:00-18:00 (GMT+8), Tuesday June 21st, 2022

Location: Tencent Meeting

**Abstract:**
Let \(\mathcal{D}=(\mathcal{P},\mathcal{B})\) be a \(G\)-locally-primitive \(2\)-\((v,k,\lambda)\) design.
We say \(G\) is of type \((X,Y)\), or \((G^\mathcal{P},G^\mathcal{B}) = (X,Y)\), if \(G\) acts faithfully and quasi-primitively on \(\mathcal{P}\) of type \(X\) and on \(\mathcal{B}\) of type \(Y\). In this talk, we discuss the possible quasi-primitive types for \(G.
\) We show that \((G^\mathcal{P},G^\mathcal{B}) \ne (\mathrm{PA},\mathrm{SD})\) or \((\mathrm{PA},\mathrm{CD})\).

Host: 丁兆宸 Zhaochen Ding