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Examples at low primes and large heights

Hot Topics: Life after the Telescope Conjecture December 09, 2024 - December 13, 2024

December 13, 2024 (09:30 AM PST - 10:30 AM PST)
Speaker(s): Andrew Senger (Harvard University)
Location: SLMath: Eisenbud Auditorium, Online/Virtual
Primary Mathematics Subject Classification No Primary AMS MSC
Secondary Mathematics Subject Classification No Secondary AMS MSC
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Abstract

To apply asymptotic constancy, we require fp-type n ring spectra that both satisfy Lichtenbaum–Quillen and admit locally unipotent Z-actions. For our study of the telescope conjecture, these Z-actions should be related to cyclotomic extensions. At primes p ≥ 5 and height n + 1 = 2, we may use the Adams summand BP⟨1⟩, the computations of Ausoni–Rognes, and geometrically defined Adams operations. At primes p < 5 and height n+1 = 2, we may still use geometrically defined Adams operations on the Adams summand, but need a replacement for the Ausoni–Rognes proof of Lichtenbaum–Quillen.
At a general prime and height, this talk will summarize how BP⟨n⟩ can be constructed as an E3-ring with (E1 ⊗ A2)-Adams operations, and how one may prove the Lichtenbaum–Quillen property for it.

Suggested references: [BHLS23, §5,§7]

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