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Yang Zeng

Publications and source records attributed to Yang Zeng.

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Finite $W$-superalgebras and the dimensional lower bounds for the representations of basic Lie superalgebras

In this paper we formulate a conjecture about the minimal dimensional representations of the finite $W$-superalgebra $U(\mathfrak{g}_\bbc,e)$ over the field of complex numbers and demonstrate it with examples including all the cases of type $A$. Under the assumption of this conjecture, we show that the lower bounds of dimensions in the modular representations of basic Lie superalgebras are attainable. Such lower bounds, as a super-version of Kac-Weisfeiler conjecture, were formulated by Wang-Zhao in \cite{WZ} for the modular representations of a basic Lie superalgebra ${\ggg}_{\bbk}$ over an algebraically closed field $\bbk$ of positive characteristic $p$.

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Finite W-superalgebras for basic classical Lie superalgebras

We consider the finite W-superalgebras for a basic classical Lie superalgebra g associated with an even nilpotent element in g both over the field of complex numbers field and and over a filed of positive characteristic. We present the PBW theorem for these finite W-superalgebrfas. Then we formulate a conjecture about the minimal dimensional representations of of complex finite W-superalgebras, and demonstrate it with some examples. Under the assumption that the conjecture holds, we finally show that the lower bound of dimensions predicted in the super version of Kac-Weisfeiler conjecture formulated and proved by Wang-Zhao in [40] for the modular representations of the basic classical Lie superalgebra with any p-characters can be reached.

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