No, it's completely different than simple squaring. The inverse square root is u... | Hacker News

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		jessriedel on Nov 3, 2020 \| parent \| context \| favorite \| on: Fast Inverse Square Root No, it's completely different than simple squaring. The inverse square root is undefined for negative numbers ;)

MaxBarraclough on Nov 3, 2020 [–]

That's not right. The so-called fast inverse square root function computes the reciprocal of the square root, not the square.

You're not the only one to be confused by the name. An awful choice of name, in my opinion.

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