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On Wed, Mar 21, 2018 at 8:49 PM, David Mertz <mertz@gnosis.cx> wrote:

For example, this can be true (even without reaching inf):

>>> x.is\_integer()
True
>>> (math.sqrt(x\*\*2)).is\_integer()
False

If you have a moment to share it, I'd be interested to know what value of \`x\` you used to achieve this, and what system you were on. This can't happen under IEEE 754 arithmetic.

Mark