Talk:Perfect numbers: Difference between revisions
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:: Hmmm ... It was the word factor rather than divisor that made it seem wrong. --[[User:Dgamey|Dgamey]] 01:06, 20 August 2010 (UTC) |
:: Hmmm ... It was the word factor rather than divisor that made it seem wrong. --[[User:Dgamey|Dgamey]] 01:06, 20 August 2010 (UTC) |
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:::A brief search on the wikipedia oracle seems to show that they are the same unless you're talking about graphs. It doesn't make any difference to me or math books which word you use in this case, so whatever it is now I say leave it. FFR they are the same, though. --[[User:Mwn3d|Mwn3d]] 03:08, 20 August 2010 (UTC) |
:::A brief search on the wikipedia oracle seems to show that they are the same unless you're talking about graphs. It doesn't make any difference to me or math books which word you use in this case, so whatever it is now I say leave it. FFR they are the same, though. --[[User:Mwn3d|Mwn3d]] 03:08, 20 August 2010 (UTC) |
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= Cheats? = |
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May I humbly suggest that the "Go" solution is a bit of a cheat? It apparently pre-loads known perfect numbers into an array and checks to see if the input matches one of them. --[[User:Balrog|Balrog]] 00:05, 23 February 2011 (UTC) |
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Revision as of 00:05, 23 February 2011
Definition Error
The alternate definition is awkward/wrong and doesn't make sense. How can a number have a factor larger than itself?
- An equivalent condition is that n is perfect if the sum of n's factors that are less than n is equal to n.
Replaced definition with wp ref and text
- perhaps this was referring to the method used in the rational arithmetic task?
--Dgamey 14:57, 19 August 2010 (UTC)
- The difinition above is correct. It doesn't necessarily allow for factors larger than n, but it does not include n in the sum of the factors. For instance, 6 is perfect. Its factors are 1, 2, 3, and 6. The "factors that are less than" 6 are 1, 2, and 3 which add up to 6. I don't see a problem with that definition. --Mwn3d 15:52, 19 August 2010 (UTC)
- Hmmm ... It was the word factor rather than divisor that made it seem wrong. --Dgamey 01:06, 20 August 2010 (UTC)
- A brief search on the wikipedia oracle seems to show that they are the same unless you're talking about graphs. It doesn't make any difference to me or math books which word you use in this case, so whatever it is now I say leave it. FFR they are the same, though. --Mwn3d 03:08, 20 August 2010 (UTC)
- Hmmm ... It was the word factor rather than divisor that made it seem wrong. --Dgamey 01:06, 20 August 2010 (UTC)
Cheats?
May I humbly suggest that the "Go" solution is a bit of a cheat? It apparently pre-loads known perfect numbers into an array and checks to see if the input matches one of them. --Balrog 00:05, 23 February 2011 (UTC)