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math.LO2022★ 1 cited
The definable content of homological invariants II: Čech cohomology and homotopy classification
Jeffrey Bergfalk, Martino Lupini, Aristotelis Panagiotopoulos
This is the second installment in a series of papers applying descriptive set theoretic techniques to both analyze and enrich classical functors from homological algebra and algebr…
math.LO2022
A descriptive approach to higher derived limits
Nathaniel Bannister, Jeffrey Bergfalk, Justin Tatch Moore +1
We present a new aspect of the study of higher derived limits. More precisely, we introduce a complexity measure for the elements of higher derived limits over the directed set …