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Given a linear category over a finite field such that the moduli space of its objects is a smooth Artin stack (and some additional conditions) we give formulas for an exponential sum over the set of absolutely indecomposable objects and a…

Algebraic Geometry · Mathematics 2016-12-07 Galyna Dobrovolska , Victor Ginzburg , Roman Travkin

We study the intersection theory on the moduli spaces of maps of $n$-pointed curves $f:(C,s_1,... s_n)\to V$ which are stable with respect to a weight data $(a_1,..., a_n)$, $0\le a_i\le 1$. After describing the structure of these moduli…

Algebraic Geometry · Mathematics 2007-11-13 Valery Alexeev , G. Michael Guy

This paper focuses on the biderivations of 4-dimensional nilpotent complex Leibniz algebras. Using the existing classification of these algebras, we develop algorithms to compute derivations, antiderivations, and biderivations as pairs of…

Rings and Algebras · Mathematics 2025-01-22 Ahmed Zahari Abdou , Bouzid Mosbahi

Under some assumptions, we compute the Picard group of moduli of stable sheaves on Abelian surfaces. Considering relative moduli spaces, it is sufficient to consider the moduli of stable sheaves on the product of elliptic curves. By using…

alg-geom · Mathematics 2008-02-03 Kota Yoshioka

This manuscript is devoted to investigate Bianchi Type $I$ universe in the context of $f(R,T)$ gravity. For this purpose, we explore the exact solutions of locally rotationally symmetric Bianchi type $I$ spacetime. The modified field…

General Physics · Physics 2015-08-07 M. Farasat Shamir

We develop explicit variational formulas for the $p(\cdot)$-modulus of curve families in symmetric domains of $\mathbb{R}^n$, under a log-H\"older continuous exponent $p\colon\Omega\to(1,\infty)$, where $\Omega$ is an open set. For annuli…

Complex Variables · Mathematics 2026-03-31 Rahim Kargar

This paper provides a rigorous study of tropicalizations of locally symmetric varieties. We give applications beyond tropical geometry, to the cohomology of moduli spaces as well as to the cohomology of arithmetic groups. We study two cases…

Algebraic Geometry · Mathematics 2026-03-13 Eran Assaf , Madeline Brandt , Juliette Bruce , Melody Chan , Raluca Vlad

Usually, for extension of local maps, one uses multiplication by so called bump functions. However, majority of infinite-dimensional linear topological spaces do not have smooth bump functions. Therefore, in \cite{BR} we suggested a new…

Functional Analysis · Mathematics 2018-12-31 Genrich Belitskii , Victoria Rayskin

The Langlands Programme predicts that a weight 2 newform f over a number field K with integer Hecke eigenvalues generally should have an associated elliptic curve E_f over K. In our previous paper, we associated, building on works of Darmon…

Number Theory · Mathematics 2015-01-15 Xavier Guitart , Marc Masdeu , Mehmet Haluk Sengun

We use the theory of logarithmic line bundles to construct compactifications of spaces of roots of a line bundle on a family of curves, generalising work of a number of authors. This runs via a study of the torsion in the tropical and…

Algebraic Geometry · Mathematics 2024-06-25 David Holmes , Giulio Orecchia

In this article, we describe how to compute slopes of $p$-adic $\mathcal{L}$-invariants of arbitrary weight and level by means of the Greenberg-Stevens formula. Our method is based on work of Lauder and Vonk on computing the reverse…

Number Theory · Mathematics 2019-01-29 Samuele Anni , Gebhard Boeckle , Peter Mathias Graef , Alvaro Troya

We propose a method for computing approximations to the Hecke eigenvalues of a classical modular eigenform $f$, based on the analytic evaluation of $f$ at points in the upper half plane. Our approach works with arbitrary precision, allows…

Number Theory · Mathematics 2019-10-03 David Armendariz , Owen Colman , Nicolas Coloma , Alexandru Ghitza , Nathan C. Ryan , Dario Teran

A moduli space of stable quotients of the rank n trivial sheaf on stable curves is introduced. Over nonsingular curves, the moduli space is Grothendieck's Quot scheme. Over nodal curves, a relative construction is made to keep the torsion…

Algebraic Geometry · Mathematics 2014-11-11 A. Marian , D. Oprea , R. Pandharipande

Let $\Gamma$ be a Bianchi group associated to one of the five Euclidean imaginary quadratic fields. We show that the space of weight $k$ period polynomials for $\Gamma$ is ``dual'' to the space of weight $k$ modular symbols for $\Gamma$,…

Number Theory · Mathematics 2026-02-09 Lewis Combes

Let f be a Bianchi modular form, that is, an automorphic form for GL(2) over an imaginary quadratic field F. In this paper, we prove an exceptional zero conjecture in the case where f is new at a prime above p. More precisely, for each…

Number Theory · Mathematics 2020-07-23 Daniel Barrera Salazar , Chris Williams

Invariant Lagrangians yield invariant Euler-Lagrange equations, and it was discussed in the literature how to compute those using various local methods. The focus of this paper is on global algebraic differential invariants. In this case…

Differential Geometry · Mathematics 2026-01-13 Boris Kruglikov , Eivind Schneider , Wijnand Steneker

In this article, we investigate the variance of local $\varepsilon$-factor for a modular form with arbitrary nebentypus with respect to twisting by a quadratic character. We detect the type of the supercuspidal representation from that. For…

Number Theory · Mathematics 2020-01-17 Debargha Banerjee , Tathagata Mandal

In this paper we describe a method for computing a basis for the space of weight $2$ cusp forms invariant under a non-split Cartan subgroup of prime level $p$. As an application we compute, for certain small values of $p$, explicit…

Number Theory · Mathematics 2018-05-18 Pietro Mercuri , Rene Schoof

We survey old and new results about the cohomology of the moduli space $A_g$ of principally polarized abelian varieties of genus $g$ and its compactifications. The main emphasis lies on the computation of the cohomology for small genus and…

Algebraic Geometry · Mathematics 2018-05-16 Klaus Hulek , Orsola Tommasi

The stable pairs theory of local curves in 3-folds (equivariant with respect to the scaling 2-torus) is studied with stationary descendent insertions. Reduction rules are found to lower descendents when higher than the degree. Factorization…

Algebraic Geometry · Mathematics 2012-07-05 R. Pandharipande , A. Pixton
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