Abstract
<p style='text-indent:20px;'>The main aim of this article is to characterize inner Poisson structure on a quantum cluster algebra without coefficients. Mainly, we prove that inner Poisson structure on a quantum cluster algebra without coefficients is always a standard Poisson structure. We introduce the concept of so-called locally inner Poisson structure on a quantum cluster algebra and then show it is equivalent to locally standard Poisson structure in the case without coefficients. Based on the result from [<xref ref-type="bibr" rid="b7">7</xref>] we obtain finally the equivalence between locally inner Poisson structure and compatible Poisson structure in this case.</p>
Highlights
The main aim of this article is to characterize inner Poisson structure on a quantum cluster algebra without coefficients
It can be verified that μk(Σ) is a quantum seed and μk is an involution
Fq generated by all variables in X(t) is called the quantum cluster algebra Aq(Σ)
Summary
Fq generated by all variables in X(t) is called the quantum cluster algebra Aq(Σ) (Theorem 2.5) Let Aq be a quantum cluster algebra without coefficients, any inner Poisson structure on Aq must be a standard Poison structure. We generalize the definition to locally inner Poisson structures and find following equivalence. (Theorem 3.6) Let Aq be a quantum cluster algebra without coefficients and {−, −} a Poisson structure on Aq. The following statements are equivalent:. (3) {−, −} is compatible with Aq. The following theorem from [8] gives a correspondence between inner Poisson brackets and k-linear transformations. We study the inner Poisson structures of a quantum cluster algebra Aq with deformation matrix Λ.
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