Timeline for Nonlinear smooth bijection from $\mathbb Q$ to itself [duplicate]
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 23, 2016 at 13:00 | comment | added | Martin Hairer | @ToddTrimble That's what happens when one types too fast and too late at night... | |
| Mar 23, 2016 at 7:07 | history | closed |
Gerry Myerson Ryan Budney Alexandre Eremenko Alexey Ustinov Alex Degtyarev |
Duplicate of Smooth functions for which $f(x)$ is rational if and only if $x$ is rational | |
| Mar 23, 2016 at 0:36 | comment | added | Todd Trimble | Sort of, except this question imposes bijectivity. Fortunately, this condition was treated by Pietro Majer in his solution over there. | |
| Mar 22, 2016 at 23:37 | comment | added | Ryan Budney | As written, this is a special-case of the question znt links to. | |
| Mar 22, 2016 at 23:16 | comment | added | Todd Trimble | @MartinHairer That doesn't look surjective to me (no rational value of $x$ maps to $1$). | |
| Mar 22, 2016 at 22:35 | review | Close votes | |||
| Mar 23, 2016 at 7:07 | |||||
| Mar 22, 2016 at 22:16 | comment | added | Martin Hairer | $x \mapsto {x^3 \over 1+x^2}$ | |
| Mar 22, 2016 at 22:11 | comment | added | znt | mathoverflow.net/questions/48910/… | |
| Mar 22, 2016 at 21:41 | history | edited | Marco Disce | CC BY-SA 3.0 |
deleted 1 character in body; edited title
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| Mar 22, 2016 at 21:28 | history | asked | Marco Disce | CC BY-SA 3.0 |