Abstract
The linear holonomy of a Poisson structure, introduced in the present paper, generalizes the linearized holonomy of a regular symplectic foliation. For singular Poisson structures the linear holonomy is defined for the lifts of tangential paths to the cotangent bundle. The linear holonomy is closely related to the modular class. Namely, the logarithm of the determinant of the linear holonomy is equal to the integral of the modular vector field along such a lift. This assertion relies on the notion of the integral of a vector field along a cotangent path on a Poisson manifold, which is also introduced in the paper.
We then prove that for locally unimodular Poisson manifolds the modular class is an invariant of Morita equivalence.
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The work was partially supported by the NSF and by the faculty research funds of the UC Santa Cruz.
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Ginzburg, V.L., Golubev, A. Holonomy on poisson manifolds and the modular class. Isr. J. Math. 122, 221–242 (2001). https://doi.org/10.1007/BF02809901
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DOI: https://doi.org/10.1007/BF02809901