Talk:Λ

RFV discussion: December 2014–March 2015
Rfv-sense: "An empty set". I think not. (Also why "an"? Assuming the axiom of extensionality, one of the least controversial ones, the empty set is unique.) — Keφr 17:10, 31 December 2014 (UTC)
 * As per, can we get any input from User:Bequw? --Dan Polansky (talk) 17:58, 31 December 2014 (UTC)
 * I've seen it as the null link in computer science.--Prosfilaes (talk) 01:56, 1 January 2015 (UTC)
 * What is a null link? — Keφr 02:55, 1 January 2015 (UTC)
 * Another way of saying null pointer. --Catsidhe (verba, facta) 03:03, 1 January 2015 (UTC)
 * I do recall seeing this in older texts. Now to dig up cites… that'll be harder. &#x200b;—msh210℠ (talk) 08:02, 1 January 2015 (UTC)
 * Incidentally, aren't we missing an ==Ancient Greek==/===Letter=== sense? &#x200b;—msh210℠ (talk) 08:04, 1 January 2015 (UTC)
 * Fwiw, [[w:empty set]] says "Other notations for the empty set include 'Λ'", citing John B. Conway, Functions of One Complex Variable, 2nd edition, page 12, and [[w:ru:пустое множество]] says "Реже пустое множество обозначают одним из следующих символов: 0 и Λ". (I haven't a copy of Conway.) &#x200b;—msh210℠ (talk) 08:30, 1 January 2015 (UTC)
 * [//books.google.com/books?id=9LtfZr1snG0C&pg=PA12&dq=%22We+denote+the+empty+set,+the+set+consisting+of+no+elements,+by%22 Someone must have been drunk.] — Keφr 14:19, 1 January 2015 (UTC)
 * In case that link doesn't work for some users: it shows that Conway's book actually says "We denote the empty set, the set consisting of no elements, by □." - -sche (discuss) 20:55, 6 March 2015 (UTC)


 * RFV-failed. - -sche (discuss) 20:42, 27 March 2015 (UTC)

Also Lepton
Isn't this also the Lepton (unofficial currency symbol)? 173.88.246.138 07:25, 29 May 2023 (UTC)