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math.LO2018
Dense computability, upper cones, and minimal pairs
Eric P. Astor, Denis R. Hirschfeldt, Carl G. Jockusch
This paper concerns algorithms that give correct answers with (asymptotic) density . A dense description of a function is a partial function on such that $\…
math.LO2018
The determined property of Baire in reverse math
Eric P. Astor, Damir Dzhafarov, Antonio Montalbán +2
We define the notion of a determined Borel code in reverse math, and consider the principle , which states that every determined Borel set has the property of Baire. We show t…