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Let $Z$ be a projective hypersurface such that its underlying reduced variety has only isolated singularities. In case its irreducible components have constant multiplicities, for instance if $\dim Z>1$, we show that the spectrum of its…

Algebraic Geometry · Mathematics 2025-08-08 Seung-Jo Jung , Morihiko Saito , Youngho Yoon

We prove results generalizing the classical Riemann Singularity Theorem to the case of integral, singular curves. The main result is a computation of the multiplicity of the theta divisor of an integral, nodal curve at an arbitrary point.…

Algebraic Geometry · Mathematics 2015-03-13 Sebastian Casalaina-Martin , Jesse Leo Kass

We give a formula for the spectral pairs (after Steenbrink) for composite singularities of several variables. (Note that for two variable case is studyed by Nemethi-Steenbrink.) Here composite singularity is given by the equation f(g_1,…

Algebraic Geometry · Mathematics 2007-05-23 Tomohide Terasoma

The generalized Verlinde formulae expressing traces of mapping classes corresponding to automorphisms of certain Riemann surfaces, and the congruence relations on allowed modular representations following from them are presented. The…

High Energy Physics - Theory · Physics 2009-11-10 Tamas Varga

We develop a unified method to study spectral determinants for several different manifolds, including spheres and hemispheres, and projective spaces. This is a direct consequence of an approach based on deriving recursion relations for the…

Spectral Theory · Mathematics 2025-06-30 J. Cunha , P. Freitas

We study the "generic" degenerations of curves with two singular points when the points merge. First, the notion of generic degeneration is defined precisely. Then a method to classify the possible results of generic degenerations is…

Algebraic Geometry · Mathematics 2009-04-21 Dmitry Kerner

For a given spectral curve, we construct a family of symplectic dual spectral curves for which we prove an explicit formula expressing the $n$-point functions produced by the topological recursion on these curves via the $n$-point functions…

Mathematical Physics · Physics 2025-01-22 Alexander Alexandrov , Boris Bychkov , Petr Dunin-Barkowski , Maxim Kazarian , Sergey Shadrin

When does topological recursion applied to a family of spectral curves commute with taking limits? This problem is subtle, especially when the ramification structure of the spectral curve changes at the limit point. We provide sufficient…

Algebraic Geometry · Mathematics 2026-02-24 Gaëtan Borot , Vincent Bouchard , Nitin Kumar Chidambaram , Reinier Kramer , Sergey Shadrin

We find a recursive formula for the motivic Milnor fiber of an irreducible plane curve, using the notions of a truncation and derived curve. We then apply natural transformations to obtain a similar recursion for the Hodge-theoretic…

Algebraic Geometry · Mathematics 2016-10-27 Manuel González Villa , Gary Kennedy , Lee J. McEwan

We present a topological recursion formula for calculating the intersection numbers defined on the moduli space of open Riemann surfaces. The spectral curve is $x = \frac{1}{2}y^2$, the same as spectral curve used to calculate intersection…

Mathematical Physics · Physics 2016-02-04 Brad Safnuk

We characterize the extendibility of the normal curvature on frontals and we give a representation formula of this type of frontals. Also we give representation formulas for wavefronts on all types of singularities and others sub classes of…

Differential Geometry · Mathematics 2022-06-17 T. A. Medina-Tejeda

We prove that the topological recursion formalism can be used to quantize any generic classical spectral curve with smooth ramification points and simply ramified away from poles. For this purpose, we build both the associated quantum…

Mathematical Physics · Physics 2024-03-26 Bertrand Eynard , Elba Garcia-Failde , Olivier Marchal , Nicolas Orantin

We introduce a new formulation of the so-called topological recursion, that is defined globally on a compact Riemann surface. We prove that it is equivalent to the generalized recursion for spectral curves with arbitrary ramification. Using…

Mathematical Physics · Physics 2013-03-07 Vincent Bouchard , Bertrand Eynard

We propose an alternative variational principle whose critical point is the algebraic plane curve associated to a matrix model (the spectral curve, i.e. the large $N$ limit of the resolvent). More generally, we consider a variational…

High Energy Physics - Theory · Physics 2014-08-01 B. Eynard

We generalize two classical formulas for complete intersection curves by introducing the the complete intersection discrepancy of a curve as a correction term. The first is a well-known multiplicity formula in singularity theory, due to…

Algebraic Geometry · Mathematics 2026-04-07 Andrei Benguş-Lasnier , Antoni Rangachev

First, this paper presents a systematic procedure for constructing criteria for singularities of curves of finite multiplicities in $\boldsymbol{R}^N$. Based on this method, we provide explicit criteria for singularities of multiplicities…

Differential Geometry · Mathematics 2026-05-13 Jun Matsumoto , Shuki Sano , Kiyoto Yanagida

The two matrix model is considered, with measure given by the exponential of a sum of polynomials in two different variables. It is shown how to derive a sequence of pairs of ``dual'' finite size systems of ODEs for the corresponding…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 M. Bertola , B. Eynard , J. Harnad

We discuss how to use the recent progress in understanding of the $x$-$y$ duality and symplectic duality in the theory of topological recursion and its generalizations in order to efficiently compute the quantum spectral curve operators for…

Mathematical Physics · Physics 2025-04-22 Alexander Hock , Sergey Shadrin

Linear differential equations and recurrences reveal many properties about their solutions. Therefore, these equations are well-suited for representing solutions and computing with special functions. We identify a large class of existing…

Symbolic Computation · Computer Science 2026-01-14 Louis Gaillard

We give an explicit formula for the exponents (i.e. the spectra up to the shift by one) of an irreducible plane curve singularity in terms of Puiseux pairs. As an application we prove in this case Hertling's conjecture that the variance…

Algebraic Geometry · Mathematics 2007-05-23 Morihiko Saito
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