We compute 1/2-derivations on the deformative Schr\"{o}dinger-Witt algebra, on not-finitely graded Witt algebras Wₙ(G), and on not-finitely graded Heisenberg-Witt algebra HWₙ(G). We classify all transposed Poisson structures on such algebras.
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Kaygorodov et al. (2024) studied this question.
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