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The classification of map-germs up to the natural right-left equivalence (also known as A-equivalence) is often complicated. Certainly it is more complicated than K-equivalence which is extremely easy to work with because the associated…

Algebraic Geometry · Mathematics 2013-02-06 Kevin Houston , Roberta Wik Atique

We describe the strong dual space $({\mathcal O} (D))^*$ for the space ${\mathcal O} (D)$ of holomorphic functions of several complex variables over a bounded Lipschitz domain $D$ with connected boundary $\partial D$ (as usual, ${\mathcal…

Complex Variables · Mathematics 2024-10-15 Yulia Khoryakova , Alexander Shlapunov

Let $\{P_t\}_{t>0}$ be the Dunkl-Poisson semigroup associated with a root system $R\subset \mathbb R^N$ and a multiplicity function $k\geq 0$. Analogously to the classical theory, we say that a bounded measurable function $f$ defined on…

Functional Analysis · Mathematics 2024-08-23 Jacek Dziubański , Agnieszka Hejna

We prove that for any two definable germs in a polynomially bounded o-minimal structure, there exists a critical threshold $\alpha_0 \in (0,1)$ such that if these germs are bi-$\alpha$-H"older equivalent for some $\alpha \ge \alpha_0$, then…

Algebraic Geometry · Mathematics 2025-12-29 An V. Q. Huynh , Minh B. Nguyen , Nhan X. V. Nguyen , Minh Q. Vu

We introduce a class of iterated logarithmic Lipschitz spaces $\mathcal{L}^{(k)}$, $k\in\mathbb{N}$, on an infinite tree which arise naturally in the context of operator theory. We characterize boundedness and compactness of the…

Functional Analysis · Mathematics 2022-07-26 Robert F. Allen , Flavia Colonna , Glenn R. Easley

We prove a quantitative version of the following statement. Given a Lipschitz function f from the k-dimensional unit cube into a general metric space, one can decomposed f into a finite number of BiLipschitz functions f|_{F_i} so that the…

Metric Geometry · Mathematics 2008-06-12 Raanan Schul

Let $M$ be a smooth surface in $\mathbb R^3$ (or a complex surface in $\mathbb C^3$) and $k\geq 2$ be an integer. At any point on $M$ and for any plane in $\mathbb R^3$, we construct a holomorphic map-germ $(\mathbb C^2,0)\to(\mathbb…

Differential Geometry · Mathematics 2021-02-15 G. Peñafort Sanchis , F. Tari

In this paper, we introduced some notions on the n-Normed Spaces. Those are bounded k-linear (or multilinear) functionals and k-continuous (or multicontinuous) functions with k \in \mathbb{N}. We defined k-linear functionals under several…

Functional Analysis · Mathematics 2026-05-06 Harmanus Batkunde , Muh. Nur , Al Azhary Masta , Meilin Imelda Tilukay

We study subgradient sequences of locally Lipschitz functions definable in a polynomially bounded o-minimal structure. We show that the diameter of any subgradient sequence is related to the variation in function values, with error terms…

Optimization and Control · Mathematics 2026-05-15 Lexiao Lai , Mingzhi Song

Two blow-analytically equivalent real analytic plane function germs are sub-analytically bi-Lipschitz contact equivalent

Algebraic Geometry · Mathematics 2016-01-26 Lev Birbrair , Alexandre Fernandes , Terence Gaffney , Vincent Grandjean

We consider the continuous model of log-infinitely divisible multifractal random measures (MRM) introduced in \cite{bacry} . If M is a non degenerate multifractal measure with associated metric $\rho(x,y)=M([x,y])$ and structure function…

Probability · Mathematics 2008-07-28 Rémi Rhodes , Vincent Vargas

We prove that a $k$-regulous function defined on a two-dimensional non-singular affine variety can be extended to an ambient variety. Additionally we derive some results concerning sums of squares of $k$-regulous functions; in particular we…

Algebraic Geometry · Mathematics 2024-07-30 Juliusz Banecki

In this paper we introduce a homotopy theoretic technique for proving that the $K$-theoretic assembly map is an equivalence. It is an extension of the methods used to prove split injectivity of the assembly and applies to any geometrically…

Algebraic Topology · Mathematics 2026-01-19 Gunnar Carlsson , Boris Goldfarb

Any germ of a complex analytic space is equipped with two natural metrics: the outer metric induced by the hermitian metric of the ambient space and the inner metric, which is the associated riemannian metric on the germ. These two metrics…

Algebraic Geometry · Mathematics 2019-09-25 Walter D Neumann , Helge Møller Pedersen , Anne Pichon

We prove the following theorem: if $w$ is a quasiconformal mapping of the unit disk onto itself satisfying elliptic partial differential inequality $|L[w]|\le \mathcal{B}|\nabla w|^2+\Gamma$, then $w$ is Lipschitz continuous. This {result}…

Analysis of PDEs · Mathematics 2012-02-21 David Kalaj

We show that two bi-Lipschitz equivalent Brieskorn-Pham hypersurfaces have the same multiplicities at $0$. Moreover we show that if two algebraic $(n-1)$-dimensional cones $P, R\subset\mathbb C^n$ with isolated singularities are…

Algebraic Geometry · Mathematics 2024-04-11 Alexandre Fernandes , Zbigniew Jelonek , José Edson Sampaio

In this paper, we prove a class of nontrivial q-Pochhammer symbol identities with extra parameters by iterated residue method. Then we use these identities to find relations of the quasi-map $K$-theoretical $I$-functions with level…

Algebraic Geometry · Mathematics 2020-08-21 Hai Dong , Yaoxiong Wen

We solve two main questions on linear structures of (non-)norm-attaining Lipschitz functions. First, we show that for every infinite metric space $M$, the set consisting of Lipschitz functions on $M$ which do not strongly attain their norm…

Functional Analysis · Mathematics 2024-04-12 Geunsu Choi , Mingu Jung , Han Ju Lee , Oscar Roldan

Given a curve $\Gamma\subset \mathbb C$ with specified regularity, we investigate boundedness and positivity for a certain three-point symmetrization of a Cauchy-like kernel $K_{\Gamma}$ whose definition is dictated by the geometry and…

Complex Variables · Mathematics 2021-09-29 Loredana Lanzani , Malabika Pramanik

Any germ of a complex analytic space is equipped with two natural metrics: the {\it outer metric} induced by the hermitian metric of the ambient space and the {\it inner metric}, which is the associated riemannian metric on the germ. We…

Algebraic Geometry · Mathematics 2019-09-25 Walter D Neumann , Helge Møller Pedersen , Anne Pichon