Transposed Poisson structures in graded and algebroid geometry
Abstract
We ask whether the transposed Leibniz rule 2z·[x,y]=[z· x,y]+[x,z· y] survives the two passages that turn Poisson algebras into geometry, the shift of degree which produces Gerstenhaber algebras and the passage from algebras to algebroids. We introduce graded transposed Poisson algebras with a bracket of arbitrary degree and show that the parity of the degree decides which shape the answer takes. In even degree, over a unital base, such brackets are in bijection with homogeneous derivations, and on the exterior algebra of a vector bundle in degree zero they are exactly the gauge derivations of the bundle. In odd degree the bracket is forced to be the product with a single element of that degree, so a non-negatively graded algebra carries no non-zero transposed Gerstenhaber bracket. In particular, for a Lie--Rinehart algebra (A,L), the Schouten--Rinehart Gerstenhaber algebra ΛA L is transposed if and only if the anchor and the bracket of L both vanish. We then introduce transposed F-algebroids and classify those with an identity: if the rank is at least two the anchor vanishes and the structure is the datum of a derivation of the multiplication, while if the rank is one the bundle is trivialised by the identity and the structure is, globally, the Jacobi bracket of a single vector field. For the tangent F-algebroid of an F-manifold M this forces dim M=1.
Related
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BibTeX
@misc{rosa2026transposed,
title = {{Transposed Poisson structures in graded and algebroid geometry}},
author = {Gianmarco La Rosa},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.22629},
eprint = {2610.22629},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.22629},
}
RIS
TY - UNPB
TI - Transposed Poisson structures in graded and algebroid geometry
AU - Gianmarco La Rosa
PY - 2026
DA - 2026/10/15
PB - arXiv
DO - 10.48550/arxiv.2610.22629
UR - https://arxiv.org/abs/2610.22629
AB - We ask whether the transposed Leibniz rule 2z·[x,y]=[z· x,y]+[x,z· y] survives the two passages that turn Poisson algebras into geometry, the shift of degree which produces Gerstenhaber algebras and the passage from algebras to algebroids. We introduce graded transposed Poisson algebras with a bracket of arbitrary degree and show that the parity of the degree decides which shape the answer takes. In even degree, over a unital base, such brackets are in bijection with homogeneous derivations, and on the exterior algebra of a vector bundle in degree zero they are exactly the gauge derivations of the bundle. In odd degree the bracket is forced to be the product with a single element of that degree, so a non-negatively graded algebra carries no non-zero transposed Gerstenhaber bracket. In particular, for a Lie--Rinehart algebra (A,L), the Schouten--Rinehart Gerstenhaber algebra Λ_A L is transposed if and only if the anchor and the bracket of L both vanish. We then introduce transposed F-algebroids and classify those with an identity: if the rank is at least two the anchor vanishes and the structure is the datum of a derivation of the multiplication, while if the rank is one the bundle is trivialised by the identity and the structure is, globally, the Jacobi bracket of a single vector field. For the tangent F-algebroid of an F-manifold M this forces dim M=1.
ER -