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I am expecting that the equivariant Chern character in equivariant K-theory is naturally induced by the equivariant rationalization-map on the classifying -space for equivaraiant K-theory.
Instead, people like to give various fairly involved component-definitions of the equivariant Chern character.
That these component definitions are indeed equivalent to the natural definition by rationalization of the classifying -space appears, as a side remark, below the proof of Theorem 5.5 in Lück-Oliver 01.
Does any author make this more explicit?
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