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 | 1 | initial version |
Convert your numbers to explicit rationals and ask whether their square root is in Q:
sage: sqrt(1671/1000) in QQ
False
sage: sqrt(256/100) in QQ
True
sage: sqrt(2) in QQ
False
Or you can do the conversions this way:
sage: sqrt(QQ(1.671)) in QQ
False
