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In this paper we define a quantization of the Double Ramification Hierarchies of [Bur15b] and [BR14], using intersection numbers of the double ramification cycle, the full Chern class of the Hodge bundle and psi-classes with a given…

Mathematical Physics · Physics 2016-04-26 A. Buryak , P. Rossi

Curves of genus g which admit a map to CP1 with specified ramification profile mu over 0 and nu over infinity define a double ramification cycle DR_g(mu,nu) on the moduli space of curves. The study of the restrictions of these cycles to the…

Algebraic Geometry · Mathematics 2024-09-24 F. Janda , R. Pandharipande , A. Pixton , D. Zvonkine

We define twisted versions of the classical and quantum double ramification hierarchy construction based on intersection theory of the strata of meromorphic differentials in the moduli space of stable curves and $k$-twisted double…

Algebraic Geometry · Mathematics 2024-08-27 Xavier Blot , Paolo Rossi

The double ramification hierarchy is a new integrable hierarchy of hamiltonian PDEs introduced recently by the first author. It is associated to an arbitrary given cohomological field theory. In this paper we study the double ramification…

Mathematical Physics · Physics 2015-11-26 Alexandr Buryak , Jérémy Guéré

In this paper we study various properties of the double ramification hierarchy, an integrable hierarchy of hamiltonian PDEs introduced in [Bur15] using intersection theory of the double ramification cycle in the moduli space of stable…

Mathematical Physics · Physics 2016-04-26 A. Buryak , P. Rossi

We prove a new system of relations in the tautological ring of the moduli space of curves involving stable rooted trees with level structure decorated by the top Chern class of the Hodge bundle and $\Omega$-classes and double ramification…

Algebraic Geometry · Mathematics 2024-06-11 Xavier Blot , Danilo Lewański , Sergey Shadrin

The double ramification (DR) cycle associated to a line bundle on a family of curves detects where the line bundle becomes fibrewise-trivial. The Hodge-DR Conjecture proposes a formula for powers of the first Chern class of a natural line…

Algebraic Geometry · Mathematics 2025-10-23 Alessandro Chiodo , David Holmes

We compute the classes of universal theta divisors of degrees zero and g-1 over the Deligne-Mumford compactification of the moduli space of curves, with various integer weights on the points, in particular reproving a recent result of…

Algebraic Geometry · Mathematics 2012-07-02 Samuel Grushevsky , Dmitry Zakharov

We construct the quantum double ramification hierarchy associated with the Gromov-Witten theory of elliptic curves. We use results of Oberdieck and Pixton on the intersection numbers of the double ramification cycle, the Gromov-Witten…

Algebraic Geometry · Mathematics 2025-12-05 Paolo Rossi , Sergey Shadrin , Ishan Jaztar Singh

In this paper we study various aspects of the double ramification (DR) hierarchy, introduced by the first author, and its quantization. We extend the notion of tau-symmetry to quantum integrable hierarchies and prove that the quantum DR…

Mathematical Physics · Physics 2020-07-20 Alexandr Buryak , Boris Dubrovin , Jérémy Guéré , Paolo Rossi

Inside the moduli space of curves of genus 2 with 2 marked points we consider the loci of curves admitting a map to P^1 of degree d totally ramified over the two marked points, for d>= 2. Such loci have codimension two. We compute the class…

Algebraic Geometry · Mathematics 2014-10-30 Nicola Tarasca

In [arXiv:2408.13806], two families of classical and quantum integrable hierarchies associated to arbitrary Cohomological Field Theories (CohFTs) were introduced: the meromorphic differential and twisted double ramification hierarchies. For…

Algebraic Geometry · Mathematics 2025-09-22 Xavier Blot , Paolo Rossi , Adrien Sauvaget

The double ramification cycle satisfies a basic multiplicative relation DRC(a).DRC(b) = DRC(a).DRC(a + b) over the locus of compact-type curves, but this relation fails in the Chow ring of the moduli space of stable curves. We restore this…

Algebraic Geometry · Mathematics 2017-11-29 David Holmes , Aaron Pixton , Johannes Schmitt

This paper has the purpose of presenting in an organic way a new approach to integrable (1+1)-dimensional field systems and their systematic quantization emerging from intersection theory of the moduli space of stable algebraic curves and,…

Mathematical Physics · Physics 2017-08-01 Paolo Rossi

In this paper we construct a family of cohomology classes on the moduli space of stable curves generalizing Witten's $r$-spin classes. They are parameterized by a phase space which has one extra dimension and in genus $0$ they correspond to…

Algebraic Geometry · Mathematics 2021-10-13 Alexandr Buryak , Paolo Rossi

In this paper, we formulate and present ample evidence towards the conjecture that the partition function (i.e. the exponential of the generating series of intersection numbers with monomials in psi classes) of the Pixton class on the…

Algebraic Geometry · Mathematics 2021-12-03 Alexandr Buryak , Paolo Rossi

We prove a closed formula for integrals of the cotangent line classes against the top Chern class of the Hodge bundle on the moduli space of stable pointed curves. These integrals are computed via relations obtained from virtual…

Algebraic Geometry · Mathematics 2007-05-23 C. Faber , R. Pandharipande

We prove that the cohomology classes of the moduli spaces of residueless meromorphic differentials, i.e., the closures, in the moduli space of stable curves, of the loci of smooth curves whose marked points are the zeros and poles of…

Algebraic Geometry · Mathematics 2024-10-30 Alexandr Buryak , Paolo Rossi , Dimitri Zvonkine

Let X be a nonsingular projective algebraic variety, and let S be a line bundle on X. Let A = (a_1,..., a_n) be a vector of integers. Consider a map f from a pointed curve (C,x_1,...,x_n) to X satisfying the following condition: the line…

Algebraic Geometry · Mathematics 2021-03-30 F. Janda , R. Pandharipande , A. Pixton , D. Zvonkine

We bound from below the complexity of the top Chern class of the Hodge bundle in the Chow ring of the moduli space of curves: no formulas in terms of classes of degrees 1 and 2 can exist. As a consequence of the Torelli map, the 0-section…

Algebraic Geometry · Mathematics 2022-10-18 Samouil Molcho , Rahul Pandharipande , Johannes Schmitt
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