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Mathematics
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Ris's user avatar
Ris's user avatar
Ris
  • Member for 10 years, 2 months
  • Last seen more than a month ago
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Interested in every branch of mathematics

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11
For real univariate polynomials $f, g$, $f \circ f \circ f = g \circ g \circ g \implies f = g$?
Feb 9, 2020
11
Is mate-in-$n$ problem for Trappist-1 undecidable?
Jun 3, 2022
5
All derivative of a polynomial at a point is $0$, then such polynomial is $0$
Jan 25, 2020
5
Using topological tricks to prove algebraic identities with full generality
Jun 21, 2021
4
Induction proof on substrings of a string
Jan 26, 2020
4
Is union of family of inner models also an inner model?
Jun 14, 2022
4
Does proving that closed subset of Polish space is Polish require axiom of countable choice?
Mar 5, 2020
4
Name of infinite cardinals which has nonprincipal $\sigma$-complete ultrafilters?
Nov 2, 2021
4
In $\mathsf{ReS}$, prove that if $x$ admits a double well-ordering, then $x$ is in bijection with some member in $\omega$
May 14, 2020
4
Irreducible mapping between compact Hausdorff spaces with no singleton fibers
Sep 29, 2021