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We introduce the notion of microlocal versal deformation of a plane curve. We construct equisingular versal deformations of Legendrian curves that are the conormal of a semi-quasi-homogeneous branch.

Algebraic Geometry · Mathematics 2009-12-07 João Cabral , Orlando Neto

Language models exhibit strong robustness to paraphrasing, suggesting that semantic information may be encoded through stable internal representations, yet the structure and origin of such invariance remain unclear. We propose a local…

Machine Learning · Computer Science 2026-05-08 Agnibh Dasgupta , Abdullah Tanvir , Xin Zhong

By [arXiv:1604.00528], a list of possible holonomy algebras for pseudo-Riemannian manifolds with an indecomposable torsion free ${\rm G}_{2}^*$-structure is known. Here indecomposability means that the standard representation of the algebra…

Differential Geometry · Mathematics 2018-08-06 Anna Fino , Ines Kath

A well-known combinatorial algorithm can decide generic rigidity in the plane by determining if the graph is of Pollaczek-Geiringer-Laman type. Methods from matroid theory have been used to prove other interesting results, again under the…

Metric Geometry · Mathematics 2020-10-07 Andrew Frohmader , Alexander Heaton

One of the questions investigated in deformation theory is to determine to which algebras can a given associative algebra be deformed. In this paper we investigate a different but related question, namely: for a given associative…

Algebraic Geometry · Mathematics 2023-05-08 Dave Bowman , Dora Puljic , Agata Smoktunowicz

In this paper which is the first of a series of papers on smooth structures, the concepts of C-structures and smooth structures are introduced and studied. The notion of smooth structure on semi-integral domains is given. It is shown that…

Commutative Algebra · Mathematics 2010-09-23 Ahmad Shafiei Deh Abad

We give an explicit construction of a deformation quantization of the algebra of functions on a Poisson manifolds, based on Kontsevich's local formula. The deformed algebra of functions is realized as the algebra of horizontal sections of a…

Quantum Algebra · Mathematics 2008-01-29 Alberto S. Cattaneo , Giovanni Felder , Lorenzo Tomassini

Universal Deformation Formulas (UDFs) for the deformation of associative algebras play a key role in deformation quantization. Here we present examples for certain classes of infinitesimals. A basic representable 2-cocycle $F$ of an…

Quantum Algebra · Mathematics 2019-04-15 Murray Gerstenhaber

A kinematical description of infinitesimal deformations of the worldsheet spanned in spacetime by a relativistic membrane is presented. This provides a framework for obtaining both the classical equations of motion and the equations…

General Relativity and Quantum Cosmology · Physics 2009-10-22 Riccardo Capovilla , Jemal Guven

Spatially localized deformation components are very useful for shape analysis and synthesis in 3D geometry processing. Several methods have recently been developed, with an aim to extract intuitive and interpretable deformation components.…

Graphics · Computer Science 2017-12-19 Qingyang Tan , Lin Gao , Yu-Kun Lai , Jie Yang , Shihong Xia

Metal-organic frameworks (MOFs) are porous crystalline materials with broad applications such as carbon capture and drug delivery, yet accurately predicting their 3D structures remains a significant challenge. While Large Language Models…

Machine Learning · Computer Science 2026-01-15 Mianzhi Pan , JianFei Li , Peishuo Liu , Botian Wang , Yawen Ouyang , Yiming Rong , Hao Zhou , Jianbing Zhang

Word embeddings derived from human-generated corpora inherit strong gender bias which can be further amplified by downstream models. Some commonly adopted debiasing approaches, including the seminal Hard Debias algorithm, apply…

Computation and Language · Computer Science 2020-05-05 Tianlu Wang , Xi Victoria Lin , Nazneen Fatema Rajani , Bryan McCann , Vicente Ordonez , Caiming Xiong

Sbrana and Cartan gave local classifications for the set of Euclidean hypersurfaces $M^n\subseteq\mathbb{R}^{n+1}$ which admit another genuine isometric immersions in $\mathbb{R}^{n+1}$ for $n\geq 3$. The main goal of this paper is to…

Differential Geometry · Mathematics 2022-06-06 D. Guajardo

Let $\mathbb{K}$ be an algebraically closed field of characteristic zero, and $V$ a hypersurface defined by an irreducible polynomial $f$ with coefficients in $\mathbb{K}$ . In this article we prove that an Embedded Deformation of $V$ which…

Algebraic Geometry · Mathematics 2018-06-26 Maximiliano Leyton-Álvarez

In optimization problems involving smooth functions and real and matrix variables, that contain matrix semidefiniteness constraints, consider the following change of variables: Replace the positive semidefinite matrix $X \in \mathbb{S}^d$,…

Optimization and Control · Mathematics 2025-02-05 Lijun Ding , Stephen J. Wright

The versal deformation space of a smooth rational curve in a smooth complex threefold is explicitly computed under certain hypotheses. Under an additional hypothesis, the versal deformation space is then shown to be the variety of critical…

Algebraic Geometry · Mathematics 2007-05-23 Sheldon Katz

A new class of deformation of the matrix model of M-theory is considered. The deformation is analogous to the so-called $\b$-deformation of $D=3+1$, $\mN=4$ Super Yang-Mills theory, which preserves the conformal symmetry. It is shown that…

High Energy Physics - Theory · Physics 2010-05-28 Hidehiko Shimada

A local po-space is a gluing of topological spaces which are equipped with a closed partial ordering representing the time flow. They are used as a formalization of higher dimensional automata which model concurrent systems in computer…

Algebraic Topology · Mathematics 2021-08-25 Philippe Gaucher , Eric Goubault

We describe locally the representation varieties of fundamental groups for smooth complex varieties at representations coming from the monodromy of a variation of mixed Hodge structure. Given such a manifold $X$ and such a linear…

Algebraic Geometry · Mathematics 2026-02-24 Louis-Clément Lefèvre

V.I. Arnold [Russian Math. Surveys, 26 (no. 2), 1971, pp. 29-43] gave a miniversal deformation of matrices of linear operators; that is, a simple canonical form, to which not only a given square matrix A, but also the family of all matrices…

Representation Theory · Mathematics 2007-10-08 T. N. Gaiduk , V. V. Sergeichuk , N. A. Zharko