Timeline for Totally aperiodic sequence
Current License: CC BY-SA 3.0
3 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 9, 2015 at 9:14 | vote | accept | ARG | ||
| Jan 8, 2015 at 19:24 | comment | added | Steven Stadnicki | Also, for completeness-sake, there is no square-free word over an alphabet of size 2: suppose the alphabet is $\{a,b\}$ and WLOG that the first element of the sequence is $a$. Then the next must be $b$ (else $aa$ is a square), and the next after that must be again $a$ (else $bb$ is a square). But now there's no choice for the fourth element; $a$ will yield $a^2$, while $b$ will yield $(ab)^2$. | |
| Jan 8, 2015 at 18:22 | history | answered | Michael Albert | CC BY-SA 3.0 |