Talk:Table of mathematical symbols by introduction date

Division symbol
The "$$b)\overline{~a~}$$" one. When did that happen?  Thanks.  Saintrain (talk) 21:07, 18 September 2008 (UTC)

Contradiction with Another WP Article
The article Blackboard bold (in the Origins section, second paragraph) mentions that Blackboard bold capital Q and Z were not first used/introduced by the Bourbaki Group, but this article says otherwise. Apparently, it is a common misconception/error to cite them as the notation's inventor. So, I have provided some citation tags in both articles until this issue of self-inconsistency within Wikipedia is remedied. We have to be careful in following our sources on both sides. Can we resolve this problem? 128.146.32.243 (talk) 19:56, 7 November 2013 (UTC)

Fractional bar
The muslims first used the fractional bar. Böri (talk) 10:36, 14 November 2015 (UTC)
 * This article also says: Division slash "deriving from horizontal fraction bar, invented by Arabs in the 12th century" Böri (talk) 08:25, 16 November 2015 (UTC)

Out of order
Is there a reason that "Blackboard bold capital Q (for rational numbers set)" (1895) is below "Blackboard bold capital Z (for integer numbers set)" (1930) or is that merely an error? The-erinaceous-one (talk) 08:32, 30 July 2019 (UTC)


 * It is indeed erroneous but it's not serious; the reader can put the table into chronological order by clicking on the column heading. There are other entries which are out of chronological order.  I started to correct it but decided against it, in part because of the amount of work involved.  I have changed the "ca. 1360" and "ca. 1650" entries, which louse up the sorting. -- Roger Hui (talk) 22:39, 30 July 2019 (UTC)

Disjunction but not conjunction
The article has an entry for logical disjunction but not logical conjunction. Is this because only a notation for disjunction was introduced at first, but then the "flipped" symbol was adopted for conjunction because conjunction is dual to disjunction? If this is so, then I think an entry should be added for conjunction directly after disjunction, with an unknown date/unknown first author. Joel Brennan (talk) 19:37, 7 January 2021 (UTC)