Results 41 to 50 of about 59,080 (274)

The analytic index for a family of Dirac-Ramond operators [PDF]

open access: yes, 2009
We derive a cohomological formula for the analytic index of the Dirac-Ramond operator and we exhibit its modular properties.Comment: 6 ...
Berry, O. Alvarez, P. Windey
core   +5 more sources

A fixed point result of weakly contractive operators in generalized metric spaces

open access: yesAIMS Mathematics, 2022
In this note, by using basic properties of the recently introduced concepts of generalized metric spaces, new conditions for the existence of a fixed point for weakly type contractive operator which sends a closed subset into the ambient space under ...
Mohammed Shehu Shagari   +4 more
doaj   +1 more source

Big Bang, Blowup, and Modular Curves: Algebraic Geometry in Cosmology [PDF]

open access: yes, 2014
We introduce some algebraic geometric models in cosmology related to the "boundaries" of space-time: Big Bang, Mixmaster Universe, Penrose's crossovers between aeons.
Manin, Yuri I., Marcolli, Matilde
core   +6 more sources

Common fixed point results via simulation type functions in non-Archimedean modular metric spaces and applications

open access: yesTopological Algebra and its Applications, 2022
In this study, we demonstrate the existence and uniqueness of common fixed points of a generalized (α,β)− simulation contraction on a non-Archimedean modular metric space.
Öztürk Mahpeyker, Girgin Ekber
doaj   +1 more source

Phase Transitions in Warped AdS$_3$ Gravity

open access: yes, 2015
We consider asymptotically Warped AdS$_3$ black holes in Topologically Massive Gravity. We study their thermodynamic stability and show the existence of a Hawking-Page phase transition between the black hole and thermal background phases. At zero angular
Detournay, Stéphane, Zwikel, Céline
core   +1 more source

Robert MacPherson and arithmetic groups [PDF]

open access: yes, 2006
We survey contributions of Robert MacPherson to the theory of arithmetic groups. There are two main areas we discuss: (i) explicit reduction theory for Siegel modular threefolds, and (ii) constructions of compactifications of locally symmetric spaces ...
Gunnells, Paul E.
core   +3 more sources

S-duality in Twistor Space [PDF]

open access: yes, 2012
In type IIB string compactifications on a Calabi-Yau threefold, the hypermultiplet moduli space $M_H$ must carry an isometric action of the modular group SL(2,Z), inherited from the S-duality symmetry of type IIB string theory in ten dimensions.
A Haydys   +49 more
core   +5 more sources

Some Extensions of Fixed Point Results over Quasi-JS-Spaces

open access: yesJournal of Function Spaces, 2016
We introduce the notion of quasi-JS-metric space. After defining the basic topological properties of quasi-JS-metric space, we investigate fixed point of certain mapping in the frame of complete quasi-JS-metric space.
Maha Noorwali   +2 more
doaj   +1 more source

Multivalued Fixed Point Results for Two Families of Mappings in Modular-Like Metric Spaces with Applications

open access: yesComplexity, 2020
The aim of this research work is to find out some results in fixed point theory for a pair of families of multivalued mappings fulfilling a new type of U-contractions in modular-like metric spaces.
Tahair Rasham   +5 more
doaj   +1 more source

S-duality in Abelian gauge theory revisited

open access: yes, 2011
Definition of the partition function of U(1) gauge theory is extended to a class of four-manifolds containing all compact spaces and certain asymptotically locally flat (ALF) ones including the multi-Taub--NUT spaces. The partition function is calculated
Besse   +25 more
core   +1 more source

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