(plural signum functions)
The equivalent term sign function may be avoided in speech because of possible confusion with sine.
"signum-function." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/signum-function>.
signum-function. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/signum-function
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