Differential operators on a Riemann surface with projective structure (original) (raw)

2004, Journal of Geometry and Physics

Let X be a Riemann surface equipped with a projective structure p and L a theta characteristic on X, or in other words, L is a holomorphic line bundle equipped with a holomorphic isomorphism with the holomorphic cotangent bundle Ω X. The complement of the zero section in the total space of the line bundle L has a natural holomorphic symplectic structure, and using p, this symplectic structure has a canonical quantization. Using this quantization, holomorphic differential operators on X are constructed. The main result is the construction of a canonical isomorphism H 0 (X, Diff k X (L ⊗j , L ⊗(i+j+2k)

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A quantization on Riemann surfaces with projective structure

Letters in Mathematical Physics, 2000

Let X be a Riemann surface equipped with a projective structure. Let L be a square-root of the holomorphic cotangent bundle K X. Consider the symplectic form on the complement of the zero section of L obtained by pulling back the symplectic form on KX using the map?? ...

Differential operators and flat connections on a Riemann surface

International Journal of Mathematics and Mathematical Sciences, 2003

We consider filtered holomorphic vector bundles on a compact Riemann surfaceXequipped with a holomorphic connection satisfying a certain transversality condition with respect to the filtration. IfQis a stable vector bundle of rankrand degree(1−genus(X))nr, then any holomorphic connection on the jet bundleJn(Q)satisfies this transversality condition for the natural filtration ofJn(Q)defined by projections to lower-order jets. The vector bundleJn(Q)admits holomorphic connection. The main result is the construction of a bijective correspondence between the space of all equivalence classes of holomorphic vector bundles onXwith a filtration of lengthntogether with a holomorphic connection satisfying the transversality condition and the space of all isomorphism classes of holomorphic differential operators of ordernwhose symbol is the identity map.

Projective Structure, Symplectic Connection and Quantization

2002

Let X be a connected Riemann surface equipped with a projective structure p. Let E be a holomorphic symplectic vector bundle over X equipped with a flat connection. There is a holomorphic symplectic structure on the total space of the pullback of E to the space of all nonzero holomorphic cotangent vectors on X. Using p, this symplectic form is quantized. A moduli space of Higgs bundles on a compact Riemann surface has a natural holomorphic symplectic structure. Using p, a quantization of this symplectic form over a Zariski open subset of the moduli space of Higgs bundles is constructed.

Vector bundles and connections on Riemann surfaces with projective structure

2021

Let Bg(r) be the moduli space of triples of the form (X, K X , F ), where X is a compact connected Riemann surface of genus g, with g ≥ 2, K X is a theta characteristic on X , and F is a stable vector bundle on X of rank r and degree zero. We construct a T Bg(r)–torsor Hg(r) over Bg(r). This generalizes on the one hand the torsor over the moduli space of stable vector bundles of rank r, on a fixed Riemann surface Y , given by the moduli space of holomorphic connections on the stable vector bundles of rank r on Y , and on the other hand the torsor over the moduli space of Riemann surfaces given by the moduli space of Riemann surfaces with a projective structure. It is shown that Hg(r) has a holomorphic symplectic structure compatible with the T Bg(r)–torsor structure. We also describe Hg(r) in terms of the second order matrix valued differential operators. It is shown that Hg(r) is identified with the T Bg(r)–torsor given by the sheaf of holomorphic connections on the theta line bund...

DIFFERENTIAL OPERATOR ALGEBRAS ON COMPACT RIEMANN SURFACES1

1994

This talk reviews results on the structure of algebras consisting of meromor- phic differential operators which are holomorphic outside a finite set of points on compact Riemann surfaces. For each partition into two disjoint subsets of the set of points where poles are allowed, a grading of the algebra and of the modules offorms is introduced. With respect to this grading the Lie structure of the algebra and of the modules are almost graded ones. Central extensions and semi-infinite wedge representations are studied. If one considers only differential operators of degree 1 then these algebras are generalizations of the Virasoro algebra in genus zero, resp. of Krichever Novikov algebras in higher genus.

Differential Operator Algebras on compact Riemann Surfaces

1993

This talk reviews results on the structure of algebras consisting of meromorphic differential operators which are holomorphic outside a finite set of points on compact Riemann surfaces. For each partition into two disjoint subsets of the set of points where poles are allowed, a grading of the algebra and of the modules of lambda - forms is introduced. With respect to this grading the Lie structure of the algebra and of the modules are almost graded ones. Central extensions and semi-infinite wedge representations are studied. If one considers only differential operators of degree 1 then these algebras are generalizations of the Virasoro algebra in genus zero, resp. of Krichever Novikov algebras in higher genus.

Harmonic symplectic spinors on Riemann surfaces

Manuscripta Mathematica, 1997

Symplectic spinor fields were considered already in the 70th in order to give the construction of hMf-densities in the context of geometric quantization. We introduced symplectic Dirac operators acting on symplectic spinor fields and started a systematical investigation. In this paper, we motivate the notion of harmonic symplectic spinor fields. We describe how many linearly independent harmonic symplectic spinors each Riemann surface admits. ~rthermore, we calculate the spectrum of the symplectic spinor Laplacian on the complex projective space of complex dimension 1.

Projective Structures and Automorphic Pseudodifferential Operators

2011

Automorphic pseudodifferential operators are pseudodifferential operators that are invariant under an action of a discrete subgroup Γ of SL(2,ℝ), and they are closely linked to modular forms. In particular, there is a lifting map from modular forms to automorphic pseudodifferential operators, which can be interpreted as a lifting morphism of sheaves over the Riemann surface X associated to the given discrete subgroup Γ. One of the questions raised in a paper by Cohen, Manin, and Zagier is whether the difference in the images of a local section of a sheaf under such lifting morphisms corresponding to two projective structures on X can be expressed in terms of certain Schwarzian derivatives. The purpose of this paper is to provide a positive answer to this question for some special cases

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