Every quasi-derivation of the Witt and Virasoro algebras is a derivation plus a half-derivation, and all quasi-derivations of W(a,b) are explicitly listed, with the corollary that every W(a,b) admits a nontrivial transposed delta-Poisson structure.
Transposed $\delta$-Poisson algebra structures on null-filiform associative algebras
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abstract
In this paper, we consider transposed $\delta$-Poisson algebras, which are a generalization of transposed $\delta$-Poisson algebras. In particular, we describe all transposed $\delta$-Poisson algebras of associative null-filiform algebras. It can be seen that these algebras are characterized by the roots of the polynomial $\delta^3 - 3\delta^2 + 2\delta$. A complete classification of transposed $\delta$-Poisson algebras corresponding to each value of the parameter $\delta$ is provided. Furthermore, we construct all $\delta$-Poisson algebra structures on null-filiform associative algebras, and show that they are trivial $\delta$-Poisson algebras.
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Quasi-derivations of Witt and related algebras
Every quasi-derivation of the Witt and Virasoro algebras is a derivation plus a half-derivation, and all quasi-derivations of W(a,b) are explicitly listed, with the corollary that every W(a,b) admits a nontrivial transposed delta-Poisson structure.