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On Pointed Hopf Algebra With Weyl Groups Of Exceptional Type

Posted on:2009-11-25Degree:MasterType:Thesis
Country:ChinaCandidate:P WangFull Text:PDF
GTID:2120360242990554Subject:Basic mathematics
Abstract/Summary:PDF Full Text Request
All-1-type pointed Hopf algebras with Weyl groups of exceptional type are found.It is proved that every non-1-type pointed Hopf algebra is infinite dimensional. We get two important results as follows:Let G be a Weyl group of Exceptional type.Then(ⅰ)For any bi-one Nichols algebra B(Os,x)over Weyl group G,there exist si in the first column of Table of G and j with 1≤j≤vi1such that B(Os,x)≌B(Osi,xij)is a graded pull-push YD Hopf algebra isomorphism;(ⅱ)B(Osi,xij)is of-1-type if and only if j appears in fourth column of Table of G;(ⅲ)dim(B(Osi,xij)=∞if j does not appears in fourth column of Table of G.Let H be a pointed Hopf algebra with Weyl group G=G(H)of exceptional type.Then(ⅰ)There exists an RSR(G,r,(?),u)such that(?)≌B(G,r,(?),u)is graded pull-push YD Hopf algebra isomorphism,where R:=diagfilt(H)and(?)is the subalgebra generated by R1as algebras in R;for any C∈Kr(G)and p∈IC(r,u), there exists si in the first column in Tables of G and 1≤j≤vi1such that u(C)=si and xCp=xij.Let AG:={i| there exists C∈Kr(G)such that si∈C} and for any i∈AG,Bi,G:= {j| there exists p∈IC(r,u)such that xOsiP=xij}.(ⅱ)H is of-1-type if and only if for any i∈AG and any j∈Bi,G,j appears in the fourth column of Table of G.(ⅲ)If there exist i∈AG and j∈Bi,Gsuch that j does not appear in the fourth column of Table G,then dimH=∞.
Keywords/Search Tags:Quiver, Hopf algebras, Weyl group
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