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Let $P_{n}$ be a set of $n$ points, including the origin, in the unit square $U = [0,1]^2$. We consider the problem of constructing $n$ axis-parallel and mutually disjoint rectangles inside $U$ such that the bottom-left corner of each…

Discrete Mathematics · Computer Science 2014-04-29 Sandip Banerjee , Aritra Banik , Bhargab B. Bhattacharya , Arijit Bishnu , Soumyottam Chatterjee

We give an asymptotic formula as $t\to+\infty$ for the number of common perpendiculars of length at most $t$ between two divergent geodesics or a divergent geodesic and a compact locally convex subset in negatively curved locally symmetric…

Differential Geometry · Mathematics 2024-09-30 Jouni Parkkonen , Frédéric Paulin

Canonical bundle formula due to Kawamata and others has played fundamental roles in algebraic geometry. We show that the canonical bundle formula has analytic characterization in terms of fiberwise integration, which confirms a folklore…

Algebraic Geometry · Mathematics 2025-08-25 Dano Kim

We analyze adjunction and inversion of adjunction for the $F$-purity of divisor pairs in characteristic $p > 0$. In this vein, we give a complete answer for principal divisors under $\mathbb{Q}$-Gorenstein assumptions but without…

Algebraic Geometry · Mathematics 2023-05-30 Thomas Polstra , Austyn Simpson , Kevin Tucker

We establish a new simple explicit description of combinatorial wall-crossing for the rational Cherednik algebra applied to the trivial representation. In this way we recover a theorem of P. Dimakis and G. Yue. We also present two…

Combinatorics · Mathematics 2021-06-09 Galyna Dobrovolska

For any 0-cell $B$ in a 2-category $\Bc$ we introduce the notion of adjoint algebra $\adj_B$. This is an algebra in the center of $\Bc$. We prove that, if $\ca$ is a finite tensor category, this notion applied to the 2-category of…

Quantum Algebra · Mathematics 2021-03-23 Noelia Bortolussi , Martín Mombelli

In this paper, we extend the results of \cite{BCGS} on refined conjectures by Kurihara and Kolyvagin, allowing primes of any reduction type in the case of Kurihara's conjectures, and inert primes in the underlying imaginary quadratic field…

Number Theory · Mathematics 2026-01-22 Francesc Castella , Takamichi Sano

Let $A(\ell,n,k)$ denote the number of $\ell$-tuples of commuting permutations of $n$ elements whose permutation action results in exactly $k$ orbits or connected components. We provide a new proof of an explicit formula for $A(\ell,n,k)$…

Combinatorics · Mathematics 2024-04-17 Abdelmalek Abdesselam , Pedro Brunialti , Tristan Doan , Philip Velie

We sketch a proof of the abundance conjecture that the Kodaira dimension of a compact complex algebraic manifold equals its numerical Kodaira dimension. The proof consists of the following three parts: (i) the case of numerical Kodaira…

Algebraic Geometry · Mathematics 2010-06-29 Yum-Tong Siu

We study some versions of the statement of Hadwiger's conjecture for finite as well as infinite graphs.

Combinatorics · Mathematics 2016-10-04 Dominic van der Zypen

In this short article we provide a proof of the Iitaka conjecture for algebraic fiber spaces over abelian varieties.

Algebraic Geometry · Mathematics 2016-08-04 Junyan Cao , Mihai Paun

Welded knotted objects are a combinatorial extension of knot theory, which can be used as a tool for studying ribbon surfaces in $4$-space. A finite type invariant theory for ribbon knotted surfaces was developped by Kanenobu, Habiro and…

Geometric Topology · Mathematics 2025-04-18 Adrien Casejuane , Jean-Baptiste Meilhan

We prove one divisibility relation of the anticyclotomic Iwasawa Main Conjecture for a higher weight ordinary modular form $f$ and an imaginary quadratic field satisfying a "relaxed" Heegner hypothesis. Let $\Lambda$ be the anticyclotomic…

Number Theory · Mathematics 2024-03-11 Maria Rosaria Pati

This is a survey about the Skorokhod embedding problem. It presents all known solutions together with their properties and some applications. Some of the solutions are just described, while others are studied in detail and their proofs are…

Probability · Mathematics 2007-05-23 Jan Obloj

Motivated by the work of Chudnovsky and the Eisenbud-Mazur Conjecture on evolutions, Harbourne and Huneke give a series of conjectures that relate symbolic and regular powers of ideals of fat points in $\mathbb P^n$. The conjectures involve…

Commutative Algebra · Mathematics 2014-04-01 Susan M. Cooper , Stephen G. Hartke

This paper exploits adjacencies between the orbits of an ordered set P and a consequence of the classification of finite simple groups to, in many cases, exponentially bound the number of automorphisms. Results clearly identify the…

Combinatorics · Mathematics 2023-09-12 Bernd S. W. Schröder

This paper presents four theorems that connect continuity postulates in mathematical economics to solvability axioms in mathematical psychology, and ranks them under alternative supplementary assumptions. Theorem 1 connects notions of…

Theoretical Economics · Economics 2022-04-12 Aniruddha Ghosh , M. Ali Khan , Metin Uyanik

We prove the local Kudla--Rapoport conjecture, which is a precise identity between the arithmetic intersection numbers of special cycles on unitary Rapoport--Zink spaces and the derivatives of local representation densities of hermitian…

Number Theory · Mathematics 2020-12-02 Chao Li , Wei Zhang

We prove that for any fixed unitary matrix $U$, any abelian self-adjoint algebra of matrices that is invariant under conjugation by $U$ can be embedded into a maximal abelian self-adjoint algebra that is still invariant under conjugation by…

Rings and Algebras · Mathematics 2024-02-01 Mitja Mastnak , Heydar Radjavi

Given an adjunction connecting reasonable categories with weak equivalences, we define a new derived bar and cobar construction associated to the adjunction. This yields homotopical models of the completion and cocompletion associated to…

Algebraic Topology · Mathematics 2014-12-03 Andrew J. Blumberg , Emily Riehl
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