F-THEORY

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Computing parallel/coincident phase D-brane superpotentials and Type-Ⅱ/F-theory duality
《Chinese Physics C》2018年第9期37-46,共10页Xiao-Tian Jiang Fu Zhong Yang 
Supported by NSFC(11475178) and Y4JT01VJ01
In this paper we study the parallel phase and the coincident phase of D-brane systems with the compactification of one closed modulus. D-brane systems with two phases are described by different 4-folds in terms of Ty...
关键词：Ooguri-Vafa invariants TypeⅡ/F-theory duality phase transition 
A Contribution to the DLF-Theory: On Singularities of the SU(2,2)-Action in U(1,1)
《Journal of Modern Physics》2016年第15期1963-1971,共10页Alexander Levichev 
Segal’s chronometric theory is based on a space-time D, which might be viewed as a Lie group with a causal structure defined by an invariant Lorentzian form on the Lie algebra u(2). Similarly, the space-time F is rea...
关键词：Parallelizations of Space-Time Bundles Segal’s Cosmos Conformal Group Actions in U(2) and in U(1 1) 
F-theory and N=1 Quivers from Polyvalent Geometry
《Communications in Theoretical Physics》2016年第4期492-498,共7页Adil Belha j Moulay Brahim Sedra 
We study four-dimensional quiver gauge models from F-theory compactified on fourfolds with hyper-K¨ahler structure.Using intersecting complex toric surfaces,we derive a class of N =1 quivers with charged fundamental ...
关键词：F-theory D7-branes in type IIB superstring quiver gauge theories toric geometry 
On Separation between Metric Observers in Segal’s Compact Cosmos
《Journal of Modern Physics》2015年第14期2040-2049,共10页Alexander Levichev Andrey Palyanov 
A certain class K of GR homogeneous spacetimes is considered. For each pair E, ?of spacetimes from K, ?where conformal transformation g is from . Each E (being ?or its double cover, as a manifold) is interpreted as re...
关键词：SEPARATION BETWEEN SPACETIMES Segal’s Universal COSMOS CONFORMAL Group Action on U(2) DLF-Theory 
D-brane superpotentials and Ooguri-Vafa invariants of compact Calabi-Yau threefolds
《Chinese Physics C》2015年第4期19-25,共7页徐锋军 杨富中 
Supported by NSFC(11075204,11475178)
We calculate the D-brane superpotentials for two compact Calabi-Yau manifolds X14（1,1,2,3,7） and Xs （1,1,1,2,3） which are of non-Fermat type in the type II string theory. By constructing the open mirror symmetry, ...
关键词：D-BRANE SUPERPOTENTIAL F-THEORY Ooguri-Vafa invariant 
Contractions of Certain Lie Algebras in the Context of the DLF-Theory
《Advances in Pure Mathematics》2014年第1期1-10,共10页Alexander Levichev Oleg Sviderskiy 
Contractions of the Lie algebras d = u(2), f = u(1 ,1) to the oscillator Lie algebra l are realized via the adjoint action of SU(2,2) when d, l, f are viewed as subalgebras of su(2,2). Here D, L, F are the correspondi...
关键词：LIE ALGEBRAS with Invariant LORENTZIAN Forms LORENTZIAN Symmetric Spaces CONTRACTIONS of LIE ALGEBRAS Conformal LIE Algebra Segal’s Chronometric Theory DLF-Theory 
F-Theory Description of 3-String Junction
《Communications in Theoretical Physics》2003年第5X期537-542,共6页YANGFu-Zhong 
The geometrical description of BPS 3-string junction in the F-theory background is given by lifting a string junction in lib into F-theory and constructing a holomorphic curve in K3 with respect to a special complex s...
关键词：引力结 F-理论 M-理论 正则弯曲 椭圆光纤 
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