# Insert symbol of binary independence between Y and X in Libre Writer

There is a symbol that means "Y is independent of X" that I want to put in a formula in Libre Writer. I see that I can say "Y is orthogonal of X" [Y ortho X] but I do not want that symbol.

How may I find this binary independence symbol in my catalog or add this symbol to my catalog so that I write my formula?

Many thanks!

Examples: The symbol I want is a double uptack, seen here: https://en.wikipedia.org/wiki/Conditi...

or in the answer here: https://math.stackexchange.com/questi...

One can write it in MathJax, "$\perp \"!\"!\"! \perp$" [without any quotes!]

This symbol looks like an underscore of width 1.5 with two parallel lines of height 1 that run perpendicularly into that underscore.

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I have found the Unicode char for you but cannot find and many, many fonts that contain the glyph for it:

⫫ (U+2AEB) DOUBLE UP TACK [Alias:- independence]
(from probability theory)

Extra:
I installed & checked Latin Modern Math (2014-09-05 19:59:00 - it was bound to have the glyph!) but it was empty as well (no it's not, works fine - see below). It is not going to be an easy search.

Double Extra Cream:
Lupp states that his browser shows the glyph for DOUBLE UP TACK (⫫). Lord, but that is annoying, as my Debian system will not show it (neither Firefox 41.0.1 nor Chrome 26.0.1410.63) ( - not true, works fine).

Triple Extra Cream (licking my lips)
Regina stated that 'Segoe UI Symbol' contained the font & that was truly annoying as I was left as the only guy (apart from you) that could NOT see this wretched glyph. However, no longer, and it looks like the reason was an invalid font cache file (now fixed).

A 2nd font with the glyph for DOUBLE UP TACK (and many, many other symbols) is Quivira font (and rather nice, too). After putting Latin Modern Math in ~/.font I ran fc-cache -fv & got this at the end:

:~$fc-cache -fv ... /usr/local/share/fonts: caching, new cache contents: 0 fonts, 0 dirs /home/alexK/.fonts: caching, new cache contents: 1 fonts, 0 dirs /var/cache/fontconfig: not cleaning unwritable cache directory /home/alexK/.fontconfig: cleaning cache directory /home/alexK/.fontconfig: invalid cache file: 89a7e9689afae9305e544233fdc49e84-le32d4.cache-3 fc-cache: succeeded  Everything seemed to work fine, so I ignored the error. However, after downloading Quivira (another free font) I ran fc-cache again. This time no error & both fonts work fine. In fact, all the other fonts that I've tried also have it. Whoops! Here's the final result: :~$ fc-cache -fv
...
/usr/local/share/fonts: caching, new cache contents: 0 fonts, 0 dirs
/home/alexK/.fonts: caching, new cache contents: 2 fonts, 0 dirs
/var/cache/fontconfig: not cleaning unwritable cache directory
/home/alexK/.fontconfig: cleaning cache directory
fc-cache: succeeded


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Looking for this list, the only font I found containing that glyph at code point U+2AEB was 'Cambria' (Version 6.83). It seems to be (C) MS.

Example (I also see it correctly rendered in the font my system is using for what it gets from the askbot server here.): "Thus we can state that X⫫Y is assured."

Editing: Segoe UI Symbol is also containing the glyph as Regina stated and as the web page I had linked to indicated. I had missed to test it correctly. The font seems also to be (C) MS.

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The symbol U+2AEB is available in font "Segoe UI Symbol" which belongs to Windows 7 and Windows 8.

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## Stats

Asked: 2015-10-02 19:20:10 +0200

Seen: 1,566 times

Last updated: Oct 03 '15