Timeline for The sum of integers being a bijection
Current License: CC BY-SA 2.5
8 events
| when toggle format | what | by | license | comment | |
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| Jan 1, 2011 at 8:53 | comment | added | Aaron Meyerowitz |
On the other hand, $$\begin{eqnarray*} P\times Q & \rightarrow & {\mathbb Z} \\ (p,q) & \mapsto & p+q \end{eqnarray*}$$ can be quite bizarre.
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| Dec 31, 2010 at 18:24 | answer | added | Nikita Sidorov | timeline score: 4 | |
| Dec 31, 2010 at 17:26 | vote | accept | Denis Serre | ||
| Dec 31, 2010 at 17:26 | history | edited | Denis Serre | CC BY-SA 2.5 |
added 375 characters in body
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| Dec 31, 2010 at 12:25 | answer | added | Gjergji Zaimi | timeline score: 25 | |
| Dec 31, 2010 at 10:33 | comment | added | Franz Lemmermeyer | Another obvious example is $P = a{\mathbb N}$ and $Q$ the standard complete residue system modulo $a$. | |
| Dec 31, 2010 at 10:29 | answer | added | Qiaochu Yuan | timeline score: 30 | |
| Dec 31, 2010 at 10:22 | history | asked | Denis Serre | CC BY-SA 2.5 |