Geodesic
Normalizers of elementary overgroups of $\mathrm{Ep}(2,A)$
Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 30, Tome 452 (2016), pp. 32-51 
E. Yu. Voronetsky. Normalizers of elementary overgroups of $\mathrm{Ep}(2,A)$. Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 30, Tome 452 (2016), pp. 32-51. http://geodesic.mathdoc.fr/item/ZNSL_2016_452_a1/
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     author = {E. Yu. Voronetsky},
     title = {Normalizers of elementary overgroups of~$\mathrm{Ep}(2,A)$},
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     year = {2016},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_2016_452_a1/}
}
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Voir la notice du chapitre de livre provenant de la source Math-Net.Ru

Let $A$ be an involution ring, $e_1,\dots,e_n$ be a full system of hermitian idempotents in $A$, every $e_i$ generates $A$ as a two-sided ideal, and $2\in A^*$. In this paper we calculate normalizers of groups $\mathrm{Ep}(2,A)\cdot\mathrm E(2,A,I)$ under natural assumptions on $A$, where $\mathrm{Ep}(2,A)$ denotes the elementary symplectic group, $\mathrm E(2,A,I)$ elementary subgroups of level $I$.

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