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I don't come from a mathematical background so I don't know if there's a name for this (negation? inversion?), but I'd like to know how I could name this function:

$f(x) = -x$

Santiago
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  • Negation seems fine. From a fancier perspective it's also an involution (but there are many other involutions). – Jakob Streipel Apr 14 '23 at 13:38
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    Just because something is common doesn't mean that it necessarily has a formal name. – JMoravitz Apr 14 '23 at 13:41
  • Negation, or "the additive inverse unary operator." – Thomas Andrews Apr 14 '23 at 13:46
  • Thanks for the answers. To add more context to the question, I'm working with a dataset that has a numeric column with some rows "negated" and the other rows "untransformed". The reason I'm asking is because I want to add a column indicating this and I want it to be clear and precise in meaning. I'm going with IsNegated so far. – Santiago Apr 14 '23 at 13:54
  • In some contexts, "reflection" might be a good name. (But in other contexts, not.) – Torsten Schoeneberg Apr 14 '23 at 19:53

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