$\displaystyle x$ 의 역수,reciprocal는 $\displaystyle x^{-1}=1/x=\frac1x$
곱셈역원 - 곱셈의 역원 - 곱셈,multiplication의 역원,inverse_element - multiplicative_inverse임.
pagename maybe 곱셈역원,multiplicative_inverse
Similar: 역행렬,inverse_matrix
Cmp: 반수? 덧셈역원 - 덧셈의 역원 - 덧셈,addition의 역원,inverse_element - "opposite number" 
opposite number 
opposite number 
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,sign반대
opposite number opposite number 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,sign반대
위 이것들 모두 인버스,inverse
MKL REL
reciprocity =,reciprocity =,reciprocity . reciprocity
reciprocity = https://en.wiktionary.org/wiki/reciprocity
보이는 번역들은
상반성상반성 
상반성
https://en.wikipedia.org/wiki/Reciprocity
recipr
reciprocity = https://en.wiktionary.org/wiki/reciprocity보이는 번역들은
상반성
상반성 상반성https://en.wikipedia.org/wiki/Reciprocity
reciprTwin