$x$ 의 '''역수,reciprocal'''는 $x^{-1}=1/x=\frac1x$

곱셈역원 - 곱셈의 역원 - [[곱셈,multiplication]]의 [[역원,inverse_element]] - [[multiplicative_inverse]]임.

----
Similar: [[역행렬,inverse_matrix]]

----
Cmp: 반수? 덧셈역원 - 덧셈의 역원 - [[덧셈,addition]]의 [[역원,inverse_element]] - "opposite number" Ggl:"opposite number" Ndict:"opposite number" KmsE:"opposite number" 
저건 [[additive_inverse]]
... pagename maybe [[덧셈역원,additive_inverse]]
https://simple.wikipedia.org/wiki/Opposite_number
https://en.wikipedia.org/wiki/Additive_inverse
Rel. negation
Rel. [[부호,sign]]반대

----
위 이것들 모두 [[인버스,inverse]]

----
MKL REL

[[reciprocity]] =,reciprocity =,reciprocity . reciprocity
 WtEn:reciprocity = https://en.wiktionary.org/wiki/reciprocity
 보이는 번역들은
 상반성 Ggl:상반성 Naver:상반성
 https://en.wikipedia.org/wiki/Reciprocity

KmsE:recipr

----
Twin

WtEn:reciprocal = https://en.wiktionary.org/wiki/reciprocal

----
wikiadmin
page name via WtEn:reciprocal ((1.) - 명백한 명사형) + KmsE:reciprocal