Results 111 to 120 of about 3,158,775 (365)
Covering Numbers in Linear Algebra
The American Mathematical Monthly, 2012 We compute the minimal cardinality of a covering (resp. an irredundant covering) of a vector space over an arbitrary field by proper linear subspaces. Analogues for affine linear subspaces are also given.
openaire +3 more sources
Quantum Mechanics On Spaces With Finite Fundamental Group [PDF]
, 1995 We consider in general terms dynamical systems with finite-dimensional, non-simply connected configuration-spaces. The fundamental group is assumed to be finite.
Giulini, Domenico
core +1 more source
Journal of the Association for Information Science and Technology, EarlyView.Abstract Academic libraries, institutions, and publishers are interested in predicting future publishing output to help evaluate publishing agreements. Current predictive models are overly simplistic and provide inaccurate predictions. This paper presents Bayesian and frequentist statistical models to predict future article counts and costs.
Philip M. Dixon, Eric Schares
wiley +1 more source
Group actions and coverings of Brauer graph algebras [PDF]
arXiv, 2011 We develop a theory of group actions and coverings on Brauer graphs that parallels the theory of group actions and coverings of algebras. In particular, we show that any Brauer graph can be covered by a tower of coverings of Brauer graphs such that the topmost covering has multiplicity function identically one, no loops, and no multiple edges ...
arxiv
Model Theory with Applications to Algebra and Analysis: A class of quantum Zariski geometries
, 2008 This paper is an attempt to understand the nature of non-classical Zariski geometries. Examples of such structures were first discovered in [HZ]. These examples showed that contrary to some expectations, one-dimensional Zariski geometries are not ...
B. Zilber
semanticscholar +1 more source
Construction of algebraic covers
, 2017 Let $Y$ be an algebraic variety, $\mathcal{F}$ a locally free sheaf of $\mathcal{O}_Y$-modules, and $\mathcal{R}(\mathcal{F})$ the $\mathcal{O}_Y$-algebra $\operatorname{Sym}^\bullet \mathcal{F}$. In this paper we study local properties of sheaves of $\mathcal{O}_{\mathcal{R}(\mathcal{F})}$-ideals $\mathcal{I}$ such that $\mathcal{R}(\mathcal{F ...
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Covering certain monolithic groups with proper subgroups
, 2012 Given a finite non-cyclic group $G$, call $\sigma(G)$ the least number of proper subgroups of $G$ needed to cover $G$. In this paper we give lower and upper bounds for $\sigma(G)$ for $G$ a group with a unique minimal normal subgroup $N$ isomorphic to ...
Garonzi, Martino
core +2 more sources
Prerequisite Relations Annotation Tool: Annotation and analysis of educational relations in texts
Journal of the Association for Information Science and Technology, EarlyView.Abstract Relations between terms in texts have long been studied in linguistics and specialized knowledge domains, especially when occurring in educational materials like textbooks, where they play a crucial role in guiding instructional design and learning.
Chiara Alzetta, Ilaria Torre
wiley +1 more source
Ecosystems and People, 2021 The evaluation of cultural ecosystem services based on the exploration of social values (SV) is a powerful tool to describe visitors’ perceptions of a natural landscape.
Barbara Kovács +4 more
doaj +1 more source
Uniform Trace-free Bundles of Triple Covers over Projective Planes [PDF]
arXiv, 2019 Studying coverings over algebraic varieties is an effective method in algebraic geometry. By combining the technique of triple cover from Miranda and Tan, we proved that if the degree of the branch divisor of a normal triple cover over $\P^2$ is no more than $18$ and not equal to $16$, then the trace-free bundle of the triple cover is uniform. Moreover,
arxiv