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The first purpose of this note is to comment on a recent article of Bursztyn, Lima and Meinrenken, in which it is proved that if M is a smooth submanifold of a manifold V, then there is a bijection between germs of tubular neighborhoods of…

Differential Geometry · Mathematics 2018-02-27 Ahmad Reza Haj Saeedi Sadegh , Nigel Higson

We introduce a one-parameter deformation of the 2-Toda tau-function of (weighted) Hurwitz numbers, obtained by deforming Schur functions into Jack symmetric functions. We show that its coefficients are polynomials in the deformation…

Combinatorics · Mathematics 2022-09-13 Guillaume Chapuy , Maciej Dołęga

We introduce and study the random non-compact metric space called the Brownian plane, which is obtained as the scaling limit of the uniform infinite planar quadrangulation. Alternatively, the Brownian plane is identified as the…

Probability · Mathematics 2012-04-27 Nicolas Curien , Jean-François Le Gall

Combinatorial spiders are a model for the invariant space of the tensor product of representations. The basic objects, webs, are certain directed planar graphs with boundary; algebraic operations on representations correspond to…

Combinatorics · Mathematics 2010-05-27 Julianna Tymoczko

We prove general mixing theorems for sequences of meromorphic maps on compact K\"ahler manifolds. We deduce that the bifurcation measure is exponentially mixing for a family of rational maps of $\mathbb{P}^q(\mathbb{C})$ endowed with…

Dynamical Systems · Mathematics 2024-05-06 Henry de Thelin

Using techniques introduced by H. Thomas and N. Williams in "Cyclic Symmetry of the Scaled Simplex," we prove that modular sweep maps are bijective. We construct the inverse of the modular sweep map by passing through an intermediary set of…

Combinatorics · Mathematics 2018-02-28 Hugh Thomas , Nathan Williams

For each positive integer $n$, we construct a bijection between the odd partitions and the distinct partitions of $n$ which extends Bressoud's bijection between the odd-and-distinct partitions of $n$ and the splitting partitions of $n$. We…

Combinatorics · Mathematics 2018-03-30 John Murray

When can a map between manifolds be deformed away from itself? We describe a (normal bordism) obstruction which is often computable and in general much stronger than the classical primary obstruction in cohomology. In particular, it answers…

Algebraic Topology · Mathematics 2007-05-23 Ulrich Koschorke

A rooted planar map is a connected graph embedded in the 2-sphere, with one edge marked and assigned an orientation. A term of the pure lambda calculus is said to be linear if every variable is used exactly once, normal if it contains no…

Logic in Computer Science · Computer Science 2017-01-11 Noam Zeilberger , Alain Giorgetti

We get new results (and rederive some know ones) on smooth surfaces in $\mathbb{R}^n$ by unifying several view points into a coherent general view. Namely, we show and use new relations of the evolute (caustic) with the curvature ellipse,…

Differential Geometry · Mathematics 2025-09-09 Ricardo Uribe-Vargas

We show that manifolds admitting special generic maps also admit nice generalized multisections. Special generic maps are natural generalized versions of Morse functions with exactly two singular points on closed manifolds, characterizing…

General Topology · Mathematics 2022-11-01 Naoki Kitazawa

The matrix of a permutation is a partial case of Markov transition matrices. In the same way, a measure preserving bijection of a space A with finite measure is a partial case of Markov transition operators. A Markov transition operator…

Mathematical Physics · Physics 2012-11-27 Yurii A. Neretin

We obtain the bifurcation of some special curves on generic 1-parameter families of surfaces in the Minkowski 3-space. The curves treated here are the locus of points where the induced pseudo metric is degenerate, the discriminant of the…

Differential Geometry · Mathematics 2022-08-10 Marco Antônio do Couto Fernandes

In the present work the rooted and unrooted d-regular maps on 2-dimentional oriented surfaces of genus g are enumerated. Separately and in more detail the case of d-regular maps with a single face are considered.

Combinatorics · Mathematics 2016-08-17 E. S. Krasko , A. V. Omelchenko

Osserman manifolds are a generalization of locally two-point homogeneous spaces. We introduce $k$-root manifolds in which the reduced Jacobi operator has exactly $k$ eigenvalues. We investigate one-root and two-root manifolds as another…

Differential Geometry · Mathematics 2023-01-27 Vladica Andrejić

We extend the Besicovitch-Federer projection theorem to transversal families of mappings. As an application we show that on a certain class of Riemann surfaces with constant negative curvature and with boundary, there exist natural…

Classical Analysis and ODEs · Mathematics 2012-12-13 Risto Hovila , Esa Järvenpää , Maarit Järvenpää , François Ledrappier

This note is the sequel to [A note on secondary K-theory. Algebra and Number Theory 10 (2016), no. 4, 887-906]. Making use of the recent theory of noncommutative motives, we prove that the canonical map from the derived Brauer group to the…

Algebraic Geometry · Mathematics 2017-05-09 Goncalo Tabuada

We study a generalized boundary rigidity problem, which investigates whether the areas of embedded minimal surfaces can uniquely determine a Riemannian manifold with boundary. We prove that for a conformal perturbation of an analytic metric…

Analysis of PDEs · Mathematics 2025-10-28 Leonard Busch , Tony Liimatainen , Mikko Salo , Leo Tzou

In this short note, we propose to extend differentiability (with respect to a multidimensional parameter) of a normalized eigenfunction associated to the simple, dominating eigenvalue of the weighted transfer operator for a uniformly…

Dynamical Systems · Mathematics 2018-10-12 Julien Sedro

Schnyder woods are particularly elegant combinatorial structures with numerous applications concerning planar triangulations and more generally 3-connected planar maps. We propose a simple generalization of Schnyder woods from the plane to…

Discrete Mathematics · Computer Science 2017-02-27 Benjamin Lévêque