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The names list is far, far too concise. The wave dash looks rather like a tilde. The wavy dash is extended a bit and looks like a W. The wavy line is the vertical form, and looks vaguely like a 3. But apparently, the wave dash is changing to the fullwidth tilde (why don't they just call them equal?).

@+              * This character as encoded to match JIS C 6226-1978 1-33 "wave dash". Subsequent revisions of the
 JIS standard and industry practice have settled on JIS 1-33 as being the fullwidth tilde character.
        x (wavy dash - 3030)
        x (fullwidth tilde - FF5E)

3030    WAVY DASH
        x (wavy line - 2307)
        x (wave dash - 301C)

2307    WAVY LINE
        x (wavy dash - 3030)

Elektron 18:20, 2004 Nov 1 (UTC)

Tilde in Portuguese[edit]

The entry claimed that Port. "ão" was pronounced as "ow" in [English] "cow". This is not the case, at least in standard Portuguese (both European and Brazilian). The "ow" in "cow" is more like a Portuguese "au", which it isn't even a nasal diphthong. Even if we disregard nasalization, the vowel in "cow" is an "á", not an "â", as it should be. 16 Nov. 2005.

I've deleted the following: "The diphtongs "ãe", "ão" and "õe" are completely nasal - "ão" is pronounced like the english word "own"." I'm not sure what the phrase 'completely nasal' means, and it seems superfluous, in any case. This article is not about the phonology of Portuguese. It's about the use of a particular diacritic.

The second statement, that '"ão" is pronounced like the english word own', is only (approximately) true if one disregards nasalization, which is the whole point of the tilde in Portuguese, and the fact that there is no n sound at the end of Portuguese ão. It can mislead foreigners learning Portuguese into thinking that 'ão' is pronounced just like 'own', which is not true. 22 Dec. 2005.


There is a 404 on references #3 and #1. Can someone who know how to fix it, erm... fix it please? --Habstinator (talk) 02:37, 6 November 2009 (UTC)

I was able to fix #3. No luck with #1. When you find links that don't work and you can't fix, the best thing to do is add a {{dead link|date=...}} tag to them (filling in the month and day for the date). rʨanaɢ talk/contribs 02:44, 6 November 2009 (UTC)

No Citation Needed[edit]

In the following paragraph it says that a citation is needed. If you try it in your web browser on any Linux web account, it works. No citation needed.

"In URLs, the characters %7E (or %7e) may substitute for tilde if an input device lacks a tilde key.[citation needed] Thus, and will behave in the same manner."

—Preceding unsigned comment added by (talk) 07:31, 10 January 2011 (UTC)

Technically, "just try it!" amounts to WP:OR. —Tamfang (talk) 01:41, 11 January 2011 (UTC)
Nevertheless, it's a trivial instance of percent encoding. The authoritative WP:RS is RFC3986.—Emil J. 11:38, 11 January 2011 (UTC)
At what point does it get silly?!? In the statement "California gets twice as much snow as Colorado because California is next to the Pacific Ocean" I can understand the need to cite the fact that California does indeed get twice as much snow or the scientific reason why being close to a large body of water effects the amount of snow you get, but do you have to cite that California is next to an ocean or the fact that the name of that ocean is named the Pacific Ocean? I read the WP:OR article and did not see where it says how much citation is just being silly. It might be argued that because only X% or users are on a Unix based machine you have to cite it, but in the Windows_key article it does not cite the fact that you can use the CTRL+ESC combination instead of using the windows key. --Billy Nair (talk) 01:15, 25 March 2013 (UTC)

Complex Numbers?[edit]

A diacritical tilde is sometimes used to denote a variable which takes on complex values. I would add that to the article myself, but I suspect it is tied up with its use to identify a Fourier transform, since the Fourier transform of a real-valued quantity is complex. But I'm not sure whether the Fourier transform sense grew out of the complex sense, or vice versa. SarahLawrence Scott (talk) 16:21, 3 September 2011 (UTC)

Approximation - contradiction[edit]

The article contradicts itself (between Common use and Mathematics) on the use of tilde as an approximation - both regarding "x ~ y" as meaning "of the same order of magnitude" and something like "~30 minutes" meaning "approximately 30 minutes". It also contradicts the article List of mathematical symbols. Citations as to what's correct, please? Thanks! Allens (talk) 14:16, 5 November 2011 (UTC)

The symbol means different things in different contexts. It's not a "contradiction", it's just that there isn't a unique meaning. Both can be correct. Jowa fan (talk) 00:24, 6 November 2011 (UTC)
Oops, the previous comment was based only on a reading of the "Mathematics" section (which I've now reorganised so that the issue is irrelevant). I've just looked at the "common use" section. Personally I'd advocate the deletion of that section. It's certainly the case that people do use ~ to represent approximation, even if someone out there says they shouldn't be doing it! Jowa fan (talk) 00:51, 6 November 2011 (UTC)
Understand; thanks for the reorg! I wouldn't advocate deleting the information that people use "~30", for example, to mean "about 30". Allens (talk) 02:26, 6 November 2011 (UTC)

Mac keyboards[edit]

The table for typing ~ seems to be MS Windows orientated, on Mac OSX keyboards it's often simpler: in the UK and Greek keyboard it's shift ` (the key next to the LH shift key), in the German keyboard it's Alt shift 8 (or option shift 8 if you prefer). Haven't set my mac up to US keyboard so don't know that one offhand. . dave souza, talk 21:00, 9 January 2012 (UTC) tweaked 21:09, 9 January 2012 (UTC)

Informal terminology[edit]

I would argue for CitationNeeded [citation needed] for "twiddle" and "wiggle". I was a maths major for my B.Sc. and I don't recall either term being used when reading equations. (Admittedly New Zealand English is a minority dialect.) This usage is not mentioned for either term in Mirriam Webster, and Wolfram notes it as "informal" which is a formal way of saying "slang". 17:50, 11 November 2013 (UTC) — Preceding unsigned comment added by Martin Kealey (talkcontribs)

Sounds like Wolfram has just verified them for you. Terms don't have to meet some definition of "formal" to be worth noting. —me_and 22:39, 11 November 2013 (UTC)
More precisely, Wolfram notes "twiddle" as «... In informal usage, "tilde" is often instead voiced as "twiddle" (Derbyshire 2004, p. 45)» However that is in the context of suffix-tilde, not superposition-tilde; and it makes no note of "wiggle" at all.

01:53, 4 December 2013 (UTC)

tilde in logic notation[edit]

what about the role of tilda as a negation sign in logical notation? for example, formalizing the expression "notp" as "~p"? — Preceding unsigned comment added by (talk) 08:44, 25 March 2015 (UTC)


I've seen ~ used in what are unquestionably telephone numbers. Is it a mistake or a version of a dash? (talk) 18:47, 27 March 2015 (UTC)

Inverted wave dash issue has been fixed in Unicode 8.0[edit]

I don't have spare time enough to update this article part, this is just informative if somebody wants to amend this section. (talk) 14:43, 25 June 2015 (UTC)