Difference between revisions of "Talk:Derangement"
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I believe that "inversion" in the context of permutations is far more commonly used to denote a pair $i<j$ such that $\pi(i) > \pi(j)$ – and indeed that is how is is used in the article on [[determinant]]s – and that the subject of this article is more commonly described as a "derangement". [[User:Richard Pinch|Richard Pinch]] ([[User talk:Richard Pinch|talk]]) 21:34, 30 November 2016 (CET) | I believe that "inversion" in the context of permutations is far more commonly used to denote a pair $i<j$ such that $\pi(i) > \pi(j)$ – and indeed that is how is is used in the article on [[determinant]]s – and that the subject of this article is more commonly described as a "derangement". [[User:Richard Pinch|Richard Pinch]] ([[User talk:Richard Pinch|talk]]) 21:34, 30 November 2016 (CET) | ||
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| + | : Indeed. And (again), here is a Russian version of our article: [http://dic.academic.ru/dic.nsf/enc_mathematics/1872/%D0%98%D0%9D%D0%92%D0%95%D0%A0%D0%A1%D0%98%D0%AF ИНВЕРСИЯ]. <small>Amusingly, there "homosexuality" is the first synonym of "inversion".</small> But the Russian Wikipedia article [https://ru.wikipedia.org/wiki/%D0%91%D0%B5%D1%81%D0%BF%D0%BE%D1%80%D1%8F%D0%B4%D0%BE%D0%BA_(%D0%BF%D0%B5%D1%80%D0%B5%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BA%D0%B0) "Беспорядок (перестановка)"] (that is, "deragement (permutation)") says first of all: not to be confused with "inversion (permutation)"! [[User:Boris Tsirelson|Boris Tsirelson]] ([[User talk:Boris Tsirelson|talk]]) 22:46, 30 November 2016 (CET) | ||
Revision as of 21:46, 30 November 2016
Nomenclature
I believe that "inversion" in the context of permutations is far more commonly used to denote a pair $i<j$ such that $\pi(i) > \pi(j)$ – and indeed that is how is is used in the article on determinants – and that the subject of this article is more commonly described as a "derangement". Richard Pinch (talk) 21:34, 30 November 2016 (CET)
- Indeed. And (again), here is a Russian version of our article: ИНВЕРСИЯ. Amusingly, there "homosexuality" is the first synonym of "inversion". But the Russian Wikipedia article "Беспорядок (перестановка)" (that is, "deragement (permutation)") says first of all: not to be confused with "inversion (permutation)"! Boris Tsirelson (talk) 22:46, 30 November 2016 (CET)
How to Cite This Entry:
Derangement. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Derangement&oldid=39862
Derangement. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Derangement&oldid=39862