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Apr
26
comment Can nonstandard analysis be used to prove results in constructive or computable analysis?
I do not know whether this is what you are looking for but Keita Yokoama used non-standard analysis to analyze the strength of the Riemann mapping theorem in terms of reverse mathematics, see math.tohoku.ac.jp/~y-keita/papers/…
Feb
21
accepted (Un)Decidability of the root existence problem for functions with bounded domain
Feb
17
awarded  Enthusiast
Feb
1
awarded  Commentator
Feb
1
comment Partitions of central sets via dynamical systems
Asaf: The sets $S,S′$ are clearly central. But I do not see why this implies that $\{ s_{n′} \mid n′\in S′ \}$ is central. However, this might be what Hillel was thinking about. Maybe there is just an argument missing
Feb
1
comment Partitions of central sets via dynamical systems
@Gabor: your right that should be 0, thank you. It is now corrected.
Feb
1
revised Partitions of central sets via dynamical systems
corrected definition of proximality
Feb
1
asked Partitions of central sets via dynamical systems
Jan
19
comment (Un)Decidability of the root existence problem for functions with bounded domain
@François thank you, I missed that point.
Jan
19
revised (Un)Decidability of the root existence problem for functions with bounded domain
See comment by François: He is right, I added an step which shows that decision algorithm for roots can be used to compute a root.
Jan
19
answered (Un)Decidability of the root existence problem for functions with bounded domain
Jan
14
accepted About the well ordering of finite sequences of numbers
Jan
12
awarded  Teacher
Jan
12
answered About the well ordering of finite sequences of numbers