Results 41 to 50 of about 87,020 (287)
TWO DIMENSIONAL DILATON GRAVITY COUPLED TO AN ABELIAN GAUGE FIELD [PDF]
, 1995 The most general two-dimensional dilaton gravity theory coupled to an Abelian gauge field is considered. It is shown that, up to spacetime diffeomorphisms and $U(1)$ gauge transformations, the field equations admit a two-parameter family of distinct ...
A. Achucarro +38 more
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Irregularities of Distributions and Extremal Sets in Combinatorial Complexity Theory [PDF]
, 2018 13 pages.
Aistleitner, Christoph, Hinrichs, Aicke
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Tangential extremal principles for finite and infinite systems of sets, I: basic theory [PDF]
Mathematical Programming, 2012 In this paper we develop new extremal principles in variational analysis that deal with finite and infinite systems of convex and nonconvex sets. The results obtained, unified under the name of tangential extremal principles, combine primal and dual approaches to the study of variational systems being in fact first extremal principles applied to ...
Mordukhovich, Boris S., Phan, Hung M.
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The covering lemma and q-analogues of extremal set theory problems
Ars Mathematica Contemporanea, 2023 We prove a general lemma (inspired by a lemma of Holroyd and Talbot) about the connection of the largest cardinalities (or weight) of structures satisfying some hereditary property and substructures satisfying the same hereditary property. We use it to show how results concerning forbidden subposet problems in the Boolean poset imply analogous results ...
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State-Space Geometry, Statistical Fluctuations, and Black Holes in String Theory
Advances in High Energy Physics, 2014 We study the state-space geometry of various extremal and nonextremal black holes in string theory. From the notion of the intrinsic geometry, we offer a state-space perspective to the black hole vacuum fluctuations.
Stefano Bellucci, Bhupendra Nath Tiwari
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D-brane Approach to Black Hole Quantum Mechanics [PDF]
, 1996 Strominger and Vafa have used D-brane technology to identify and precisely count the degenerate quantum states responsible for the entropy of certain extremal, BPS-saturated black holes. Here we give a Type-II D-brane description of a class of extremal {\
't Hooft +35 more
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On the regularization of extremal three-point functions involving giant gravitons
Physics Letters B, 2015 In the AdS5/CFT4 set-up, extremal three-point functions involving two giant 1/2 BPS gravitons and one point-like 1/2 BPS graviton, when calculated using semi-classical string theory methods, match the corresponding three-point functions obtained in the ...
Charlotte Kristjansen +2 more
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Electromagnetic quasitopological gravities
Journal of High Energy Physics, 2020 We identify a set of higher-derivative extensions of Einstein-Maxwell theory that allow for spherically symmetric charged solutions characterized by a single metric function f (r) = −g tt = 1/g rr .
Pablo A. Cano, Ángel Murcia
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Information Inequalities via Submodularity and a Problem in Extremal Graph Theory
Entropy, 2022 The present paper offers, in its first part, a unified approach for the derivation of families of inequalities for set functions which satisfy sub/supermodularity properties.
Igal Sason
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Unconstrained Lagrangian Variational Principles for the Einstein Field Equations
Entropy, 2023 This paper deals with the problem of establishing a systematic theoretical formulation of variational principles for the continuum gravitational field dynamics of classical General Relativity (GR).
Claudio Cremaschini, Massimo Tessarotto
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