Classical blue-shift phenomenon
Classical blue-shift phenomenon
Let be a finite group and let be a -periodic non-equivariant ring spectrum. The classical Tate construction is
Classical blue-shift phenomenon. The spectrum is -periodic for some positive integer . When , the -periodic ring spectrum is understood to be the contractible spectrum . The integer is called the blue-shift number. This conjecture generalizes known blue-shift and Tate-vanishing results, including the case of the group acting on connective complex K-theory; its general validity is not established.
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Primary source
Yangyang Ruan, “A General Blue-Shift Phenomenon”, arXiv:2301.05030 (2025).
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