Results 41 to 50 of about 86,947 (289)

Born-Infeld Corrections to the Entropy Function of Heterotic Black Holes [PDF]

, 2006
We use the black hole entropy function to study the effect of Born-Infeld terms on the entropy of extremal black holes in heterotic string theory in four dimensions.
Chandrasekhar, B.
core   +4 more sources

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
doaj   +1 more source

Extremal graph theory and finite forcibility [PDF]

, 2017
We study the uniqueness of optimal solutions to extremal graph theory problems. Our main result is a counterexample to the following conjecture of Lov´asz, which is often referred to as saying that “every extremal graph theory problem has a finitely ...
Grzesik, Andrzej, Králʼ, Daniel, Lovasz, Laszlo Miklos   +2 more
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Approximation of the classes $W^{r}_{\beta,\infty}$ by three-harmonic Poisson integrals

Karpatsʹkì Matematičnì Publìkacìï, 2019
In the paper, we solve one extremal problem of the theory of approximation of functional classes by linear methods. Namely, questions are investigated concerning the approximation of classes of differentiable functions by $\lambda$-methods of summation ...
U.Z. Hrabova, I.V. Kal'chuk
doaj   +1 more source

Flux Backgrounds in 2D String Theory [PDF]

, 2003
We study RR flux backgrounds in two dimensional type 0 string theories. In particular, we study the relation between the 0A matrix model and the extremal black hole in two dimensions.
A. Giveon, A. Kapustin, A. Sen, A. Strominger, A. Strominger, C. Ahn, C.G. Callan Jr., C.M. Hull, C.V. Johnson, D.J. Gross, D.M. Thompson, E. Witten, E.J. Martinec, G. Mandal, I.R. Klebanov, I.R. Klebanov, I.R. Klebanov, J. Ambjørn, J. de Boer, J. Gomis, J. McGreevy, J. McGreevy, J. McGreevy, J. Polchinski, J. Polchinski, J. Teschner, J.L. Karczmarek, J.M. Maldacena, K. Demeterfi, L. Susskind, M. Aganagic, M. Gutperle, M.R. Douglas, N. Lambert, N. Seiberg, Nicolaos Toumbas, O. Bergman, O. DeWolfe, P. Ginsparg, R. Dijkgraaf, S. Dasgupta, S. Mukhi, S.R. Das, S.Y. Alexandrov, Sergei Gukov, T. Eguchi, T. Takayanagi, Tadashi Takayanagi, U.H. Danielsson, X. Yin, Y. Nakayama   +50 more
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AdS 2 holography and ModMax

Journal of High Energy Physics, 2023
We present a JT gravity set up in the presence of projected ModMax corrections in two dimensions. Our starting point is the Einstein’s gravity in four dimensions accompanied by the ModMax Lagrangian. The 2D gravity action is obtained following a suitable
Hemant Rathi, Dibakar Roychowdhury
doaj   +1 more source

Extreme convex set functions with finite carrier: General theory

Discrete Mathematics, 1974
AbstractLet Ω={1,…,n} and P={X:S⊆Ω}. A mapping e : P→R+ is a convex set function if e(⊖)=0 and e(S) + e(T)⩽e(S∩T) + e(S ∪ T) for all S. TϵP. The set of convex set functions for fixed Ω is a convex cone and the paper is dealing with the extreme points of the base 1 = {e: e(Ω)=1} of this cone.
Rosenmüller, J., Weidner, H.G.
openaire   +2 more sources

Single particle operators and their correlators in free N $$ \mathcal{N} $$ = 4 SYM

Journal of High Energy Physics, 2020
We consider a set of half-BPS operators in N $$ \mathcal{N} $$ = 4 super Yang-Mills theory which are appropriate for describing single-particle states of superstring theory on AdS5 × S 5.
F. Aprile, J. M. Drummond, P. Heslop, H. Paul, F. Sanfilippo, M. Santagata, A. Stewart   +6 more
doaj   +1 more source

Transformations among large c conformal field theories

, 2005
We show that there is a set of transformations that relates all of the 24 dimensional even self-dual (Niemeier) lattices, and also leads to non-lattice objects that however cannot be interpreted as a basis for the construction of holomorphic conformal ...
Apostol, Arkani-Hamed, Bilal, Blum, Blum, Borcherds, Conway, Dixon, Dolan, Dolan, Dolan, Gannon, Gerasimov, Harvey, He, Hoehn, Lerche, Lerche, Lust, Marcin Jankiewicz, Montague, Montague, Ooguri, Rains, Schellekens, Schellekens, Schellekens, Siegel, Sloane, Thomas W. Kephart, Verlinde   +30 more
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The Largest Subsemilattices of the Endomorphism Monoid of an Independence Algebra [PDF]

, 2014
An algebra $\A$ is said to be an independence algebra if it is a matroid algebra and every map $\al:X\to A$, defined on a basis $X$ of $\A$, can be extended to an endomorphism of $\A$.
Araújo, João, Bentz, Wolfram, Konieczny, Janusz   +2 more
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