Re: How? ? ?

Le 02/04/2025 à 15:37, Python a écrit :

Le 02/04/2025 à 14:49, efji a écrit :

Le 02/04/2025 à 14:32, Richard Hachel a écrit :

How can mathematicians come up with such absurdities?
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https://www.youtube.com/watch?v=XZriBHTNPw0
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No mathematician would write \sqrt{i} because the symbol "\sqrt" designs the positive square root of a real number, which does not make sense in \C since it is not an ordered set and the word "positive" is a nonsense in \C.

 Not really, see https://en.wikipedia.org/wiki/Principal_value#Square_root

OK, it is a definition, but actually, in practice, no one takes the risk to use \sqrt{z} for z\in\C in a development since it could be misleading. And there is almost no interest to use it.
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F.J.