M-theory on G_2 manifolds and the method of (p,q) brane webs(6)
发布时间：2021-06-11
M-theory on G_2 manifolds and the method of (p,q) brane webs
stableunderthethreeU(1)subgroupsofU(1)2;twosubgroupsarejustthetwoU(1)factors,whilethethirdsubgroupisthediagonalone.P2canbeviewedasatriangleovereachpointofwhichthereisanellipticcurveT2.Thistorusshrinkstoacircleateachsegment[vi,vj]anditshrinkstoapointateachvi.Theabovetoricrealizationcanbepushedfurtherfordescribingthesamephenomenoninvolvingcomplexn-dimensionaltoricvarietiesthataremorecomplicatedthanprojectivespaces.Thelatterspacescanbeexpressedinthefollowingform
V=nCn+r\U
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