Duals of compact Lie groups realized in the Cuntz algebras and their actions on C∗-algebras
Duals of compact Lie groups realized in the Cuntz algebras and their actions on C∗-algebras
复制标题
Cuntz 代数中实现的紧李群的对偶及其在 C*-代数上的作用
DOI:
10.1016/0022-1236(87)90040-1
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发表时间:
1987
影响因子:
1.7
通讯作者:
J. Roberts
中科院分区:
文献类型:
--
作者:
S. Doplicher;J. Roberts
As a first step towards a new duality theorem for compact groups we consider a representation category T G of a compact Lie group G⊂ U (d, C) whose objects are the tensor powers of the defining representation and whose arrows are the intertwiners. We associate to T G in a natural way a C∗-algebra O G which can be identified with the fixed points of the Cuntz algebra O d under the natural action of G. O G carries a canonical endomorphism σ G, and T G can be reconstructed from {O G. σ G}. If G⊂ SU (d) then O G is simple. We give conditions for an endomorphism ϱ of a unital C∗-algebra A to determine an action of T SU (d) on A. Such actions correspond to∗-monomorphisms of O SU (d) into A with natural intertwining properties.