Results 31 to 40 of about 15,537,269 (305)
Monopolist’s mark-up and the elasticity of substitution
Croatian Operational Research Review, 2017 This paper analyzes the mark-up of the price of a product over marginal costs for a monopolist using Appelbaum’s theoretical model. The profit maximization model of an industry that uses the monopolist’s product as its input is formulated. Our goal is to
Ilko Vrankić +2 more
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Modern Physics Letters A, 2006 After a brief review of string and M-theory we point out some deficiencies. Partly to rectify them, we present several arguments for "F-theory", enlarging spacetime to (2, 10) signature, following the original suggestion of C. Vafa. We introduce a suggestive supersymmetric 27-plet of particles, associated to the exceptional symmetric hermitian space ...
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An orientifold from F theory [PDF]
Physics Letters B, 1996 7 pages, Harvmac ...
Blum, Julie D., Zaffaroni, Alberto
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On singular fibres in F-theory [PDF]
Journal of High Energy Physics, 2013 In this paper, we propose a connection between the field theory local model (Katz-Vafa field theory) and the type of singular fibre in flat crepant resolutions of elliptic Calabi-Yau fourfolds, a class of fourfolds considered by Esole and Yau. We review the analysis of degenerate fibres for models with gauge groups SU(5) and SO(10) in detail, and ...
Braun, Andreas P., Watari, Taizan
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Anomaly Cancelation in Field Theory and F-theory on a Circle [PDF]
, 2016 We study the manifestation of local gauge anomalies of four- and six-dimensional field theories in the lower-dimensional Kaluza-Klein theory obtained after circle compactification. We identify a convenient set of transformations acting on the whole tower
Sub String Theory Cosmology and ElemPart +5 more
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Nuclear Physics B, 1996 We construct compact examples of D-manifolds for type IIB strings. The construction has a natural interpretation in terms of compactification of a 12 dimensional `F-theory'. We provide evidence for a more natural reformulation of type IIB theory in terms of F-theory.
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F-theory at constant coupling [PDF]
Physics Letters B, 1996 The subspace of the moduli space of F-theory on K3 over which the coupling remains constant develops new branches at special values of this coupling. These values correspond to fixed points under the SL(2,Z) duality group of the type IIB string. The branches contain points where K3 degenerates to orbifolds of the four-torus by Z_3,Z_4 and Z_6.
Dasgupta, Keshav, Mukhi, Sunil
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Non-Abelian discrete gauge symmetries in F-theory [PDF]
, 2016 The presence of non-Abelian discrete gauge symmetries in four-dimensional F-theory compactifications is investigated. Such symmetries are shown to arise from seven-brane configurations in genuine F-theory settings without a weak string coupling ...
Sub String Theory Cosmology and ElemPart +7 more
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F-theory from fundamental five-branes
Journal of High Energy Physics, 2021 We describe the worldvolume for the bosonic sector of the lower-dimensional F-theory that embeds 4D, N=1 M-theory and the 3D Type II superstring. The worldvolume (5-brane) theory is that of a single 6D gauge 2-form X MN (σ P ) whose field strength is ...
William D. Linch, Warren Siegel
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Shift-symmetries and gauge coupling functions in orientifolds and F-theory [PDF]
, 2017 We investigate the field dependence of the gauge coupling functions of four-dimensional Type IIB orientifold and F-theory compactifications with space-time filling seven-branes.
Sub String Theory Cosmology and ElemPart +7 more
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