Results 81 to 90 of about 747,490 (222)

The Theory of Sets of Ordinals [PDF]

open access: yesarXiv, 2005
We propose a natural theory SO axiomatizing the class of sets of ordinals in a model of ZFC set theory. Both theories possess equal logical strength. Constructibility theory in SO corresponds to a natural recursion theory on ordinals.
arxiv  

Two Models for the Homotopy Theory of Cocomplete Homotopy Theories [PDF]

open access: yesarXiv, 2014
We prove that the homotopy theory of cofibration categories is equivalent to the homotopy theory of cocomplete quasicategories. This is achieved by presenting both homotopy theories as fibration categories and constructing an explicit equivalence between them.
arxiv  

Algebraic Theories in Homotopy Theory [PDF]

open access: yesThe Annals of Mathematics, 2002
An algebraic theory $T$ is a category with objects $t_0,t_2...$ such that for each $n$ the object $t_n$ is an $n$-fold categorical product of $t_1$. A strict $T$-algebra is a product preserving functor $A: T\to Spaces$. Lawvere showed that for a suitable choice of T giving such an algebra amounts to providing the space $A(t_1)$ with a familiar ...
openaire   +3 more sources

Supercharacter theories and Schur rings [PDF]

open access: yesarXiv, 2010
Diaconis and Isaacs have defined the supercharacter theories of a finite group to be certain approximations to the ordinary character theory of the group. We make explicit the connection between supercharacter theories and Schur rings, and we provide supercharacter theory constructions which correspond to Schur ring constructions of Leung and Man and ...
arxiv  

Partizipative medienpädagogische Aktionsforschung

open access: yesMedienimpulse, 2016
Für die Medienpädagogik ist wie für jede Pädagogik das Theorie-Praxis-Problem relevant. Im Beitrag wird partizipative Aktionsforschung als Methode zur Gestaltung von Theorie-Praxis-Korrelationen untersucht.
Christian Swertz   +1 more
doaj   +1 more source

String theory and the Taniyama-Shimura conjecture [PDF]

open access: yesarXiv, 2019
The worldsheet of the string theory, which consisting of 26 free scalar fields in Minkowski space, is two dimensional conformal field theory. If we denote the two dimension conformal field theory by elliptic curve and denote the partition function of string theory by modular form, then the relation between conformal field theory and the string theory ...
arxiv  

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