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Jul 13, 2015 at 2:09 comment added paul garrett One might add that even these relatively simple classical calculations may be easier if/when one realizes that everything factors over primes, so that a "local" computation suffices. Easier to avoid getting lost, maybe.
Jul 13, 2015 at 0:34 vote accept john mangual
Jul 13, 2015 at 0:15 history edited GH from MO CC BY-SA 3.0
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Jul 13, 2015 at 0:07 history answered GH from MO CC BY-SA 3.0