Timeline for The sum of integers being a bijection
Current License: CC BY-SA 2.5
3 events
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| Jan 1, 2011 at 6:22 | comment | added | Daniel Litt | Hmm...if $0$ is not a natural number, then either $P$ or $Q$ contain $0$ and are not subsets of the natural numbers (as required by the question), or neither $P$ nor $Q$ contains zero, in which case $P+Q$ cannot contain $1$. So I think this just misses. But maybe it's late and I'm being stupid? | |
| Dec 31, 2010 at 18:54 | history | edited | Nikita Sidorov | CC BY-SA 2.5 |
added 7 characters in body
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| Dec 31, 2010 at 18:24 | history | answered | Nikita Sidorov | CC BY-SA 2.5 |