Results 21 to 30 of about 11,781,613 (287)

No Uncountable Polish Group Can be a Right-Angled Artin Group

open access: yesAxioms, 2017
We prove that if G is a Polish group and A a group admitting a system of generators whose associated length function satisfies: (i) if 0 < k < ω , then l g ( x ) ≤ l g ( x k ) ; (ii) if l g ( y ) < k < ω and x
Gianluca Paolini, Saharon Shelah
doaj   +1 more source

A survey on difference hierarchies of regular languages [PDF]

open access: yesLogical Methods in Computer Science, 2018
Difference hierarchies were originally introduced by Hausdorff and they play an important role in descriptive set theory. In this survey paper, we study difference hierarchies of regular languages.
Olivier Carton   +2 more
doaj   +1 more source

The Status of Normative Propositions in the Theory of Scientific Change

open access: yesScientonomy, 2016
The scope of the Theory of Scientific Change (TSC) encompasses any and all changes that occur in a given scientific mosaic, the set of all methods employed and theories accepted at a given time by a given scientific community.
Zoe Sebastien
doaj   +1 more source

The descriptive set-theoretic complexity of the set of points of continuity of a multi-valued function (Extended Abstract) [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2010
In this article we treat a notion of continuity for a multi-valued function F and we compute the descriptive set-theoretic complexity of the set of all x for which F is continuous at x.
Vassilios Gregoriades
doaj   +1 more source

New Directions in Descriptive Set Theory [PDF]

open access: yesBulletin of Symbolic Logic, 1999
§1. I will start with a quick definition of descriptive set theory: It is the study of the structure of definable sets and functions in separable completely metrizable spaces. Such spaces are usually calledPolish spaces. Typical examples are ℝn, ℂn, (separable) Hilbert space and more generally all separable Banach spaces, theCantor space2ℕ, theBaire ...
openaire   +3 more sources

Descriptive Set Theory and Computable Topology (Dagstuhl Seminar 21461)

open access: yes, 2022
Computability and continuity are closely linked - in fact, continuity can be seen as computability relative to an arbitrary oracle. As such, concepts from topology and descriptive set theory feature heavily in the foundations of computable analysis ...
Hoyrup, Mathieu   +3 more
core   +1 more source

An Application for Descriptive Nearness: Iris Recognition

open access: yesTopological Algebra and its Applications, 2017
Near Set Theory has various applications in the literature. In this paper, using the concept descriptive nearness, we show how to perform iris recognition. This process has a few algorithms given via Mathematica Script Language.
Polat Kadirhan
doaj   +1 more source

The descriptive set-theoretic complexity of the set of points of continuity of a multi-valued function [PDF]

open access: yesLogical Methods in Computer Science, 2011
In this article we treat a notion of continuity for a multi-valued function $F$ and we compute the descriptive set-theoretic complexity of the set of all $x$ for which $F$ is continuous at $x$.
Vassilios Gregoriades
doaj   +1 more source

Social representation of spiritual surgeries in Umbanda: culture, religion and contributions of nursing theory [PDF]

open access: yesRevista Brasileira de Enfermagem, 2023
Objective: to analyze the social representation of spiritual surgeries in Umbanda for Bantu-Amerindian ritual mediums and their contributions to the cross-cultural care proposed by Madeleine Leininger.
Juliana de Lima Brandão   +7 more
doaj   +1 more source

Rate Distortion Theory for Descriptive Statistics

open access: yes, 2022
Rate distortion theory was developed for optimizing lossy compression of data, but it also has a lot of applications in statistics. In this paper we will see how rate distortion theory can be used to analyze a complicated data set involving orientations ...
Harremoës, Peter, Peter Harremoës
core   +1 more source

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