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The study of convex functions - in particular, of their optimization (really minimization) is one of the most important fields of applied mathematics. Convexity seems to be one of those incredibly well-chosen hypotheses which is just…

最优化与控制 · 数学 2026-03-11 Eigil Fjeldgren Rischel

We prove explicit lower bounds for the smallest singular value and upper bounds for the condition number of rectangular, multivariate Vandermonde matrices with scattered nodes on the complex unit circle. Analogously to the Shannon-Nyquist…

数值分析 · 数学 2021-03-16 Stefan Kunis , Dominik Nagel , Anna Strotmann

We show that the sets in a family with finite VC dimension can be uniformly approximated within a given error by a finite partition. Immediate corollaries include the fact that VC classes have finite bracketing numbers, satisfy uniform laws…

概率论 · 数学 2010-07-26 Terrence M. Adams , Andrew B. Nobel

An important theorem by Timofte states that nonnegativity of real $n$-variate symmetric polynomials of degree $d$ can be decided at test sets given by all points with at most $\lfloor\frac{d}{2}\rfloor$ distinct components. However, if the…

代数几何 · 数学 2013-03-19 Sadik Iliman , Timo de Wolff

In this paper, vector optimization is considered in the framework of decision making and optimization in general spaces. Interdependencies between domination structures in decision making and domination sets in vector optimization are…

最优化与控制 · 数学 2017-12-06 Petra Weidner

A new family of penalty functions, adaptive to likelihood, is introduced for model selection in general regression models. It arises naturally through assuming certain types of prior distribution on the regression parameters. To study…

统计方法学 · 统计学 2013-08-26 Yang Feng , Tengfei Li , Zhiliang Ying

For a class of linear maps on a von Neumann factor, we associate two objects, bounded operators and trace class operators, both of which play the roles of Choi matrices. Each of them is positive if and only if the original map on the factor…

算子代数 · 数学 2024-07-09 Kyung Hoon Han , Seung-Hyeok Kye , Erling Størmer

We introduce a new model of teaching named "preference-based teaching" and a corresponding complexity parameter---the preference-based teaching dimension (PBTD)---representing the worst-case number of examples needed to teach any concept in…

机器学习 · 计算机科学 2017-02-09 Ziyuan Gao , Christoph Ries , Hans Ulrich Simon , Sandra Zilles

Linearly distributive categories (LDC), introduced by Cockett and Seely to model multiplicative linear logic, are categories equipped with two monoidal structures that interact via linear distributivities. A seminal result in monoidal…

范畴论 · 数学 2026-01-30 Rose Kudzman-Blais

We prove that, for any $d$ linearly independent functions from some set into a $d$-dimensional vector space over any field, the family of zero sets of all non-trivial linear combination of these functions has VC-dimension and Littlestone…

This paper presents new classes of exact radial solutions to the nonlinear ordinary differential equation that arises as a saddle-point condition for a Euclidean scalar field theory in $D$-dimensional spacetime. These solutions are found by…

高能物理 - 理论 · 物理学 2023-12-12 Carl M. Bender , Sarben Sarkar

This paper introduces a new notion of dimensionality of probabilistic models from an information-theoretic view point. We call it the "descriptive dimension"(Ddim). We show that Ddim coincides with the number of independent parameters for…

机器学习 · 计算机科学 2019-10-28 Kenji Yamanishi

We begin this report by describing the Probably Approximately Correct (PAC) model for learning a concept class, consisting of subsets of a domain, and a function class, consisting of functions from the domain to the unit interval. Two…

机器学习 · 计算机科学 2011-05-25 Hubert Haoyang Duan

In recent years, deep dictionary learning (DDL)has attracted a great amount of attention due to its effectiveness for representation learning and visual recognition.~However, most existing methods focus on unsupervised deep dictionary…

机器学习 · 计算机科学 2022-07-15 Xia Yuan , Jianping Gou , Baosheng Yu , Jiali Yu , Zhang Yi

In this paper, we consider the problem of minimizing a linear functional subject to uncertain linear and bilinear matrix inequalities, which depend in a possibly nonlinear way on a vector of uncertain parameters. Motivated by recent results…

The power moments of a positive measure on the real line or the circle are characterized by the non-negativity of an infinite matrix, Hankel, respectively Toeplitz, attached to the data. Except some fortunate configurations, in higher…

泛函分析 · 数学 2020-07-28 David Kimsey , Mihai Putinar

In order to better fit real-world datasets, studying asymmetric distribution is of great interest. In this work, we derive several mathematical properties of a general class of asymmetric distributions with positive support which shows up…

Multi-distribution learning extends agnostic Probably Approximately Correct (PAC) learning to the setting in which a family of $k$ distributions, $\{D_i\}_{i\in[k]}$, is considered and a classifier's performance is measured by its error…

机器学习 · 计算机科学 2025-06-24 Chicheng Zhang , Yihan Zhou

We show that the maximum likelihood degree of a smooth very affine variety is equal to the signed topological Euler characteristic. This generalizes Orlik and Terao's solution to Varchenko's conjecture on complements of hyperplane…

代数几何 · 数学 2019-02-20 June Huh

We theoretically analyze and compare the following five popular multiclass classification methods: One vs. All, All Pairs, Tree-based classifiers, Error Correcting Output Codes (ECOC) with randomly generated code matrices, and Multiclass…

机器学习 · 计算机科学 2013-02-19 Amit Daniely , Sivan Sabato , Shai Shalev Shwartz