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I have been reading the PHP manual in both Japanese and English and have
reached the part about operators. In the `代数演算子` section they talk about `加算`,
`減算` etc, and have a table showing all of the `代数演算子` (you can see it here:
<http://www.php.net/manual/ja/language.operators.arithmetic.php>)

In the Japanese version of the manual they describe `-$a` as `負にする` but in the
English version they use the word `Negation`.

I wondered if there was a noun in Japanese to describe this, like there is
`加算` to describe `Addition`.

Since they use the word `Negation` in the English version I thought maybe `否定`
in Japanese, but I'm not sure, so if any one knows of a noun to describe this
concept any help would be appreciated.
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2013-03-07T06:00:25.227
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2013-03-07T09:02:29.810
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question
mathematics programming
How to express the concept of negation in mathematics
Find here <http://ejje.weblio.jp/content/negation>

> 4)〔数学〕否定, 相反《真偽を逆にした命題》.
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2013-03-07T06:24:04.797
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2013-03-07T06:24:04.797
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answer