Is there some input method to easily type math symbols UTF8 characters (like U+2200 FOR ALL , U+2203 THERE EXISTS , U+2208 ELEMENT OF , U+2190 LEFTWARDS ARROW , etc...)?

I would like to type easily these characters in some <textarea> in Firefox (38 or 42) on Debian/Linux/x86_64 under xfce4 or Gnome (and I want to avoid Javascript tricks for that). I am currently copy/pasting them from some CharacterMap application, which is uneasy.

The answers to this related question requires some ad-hoc configuration; I am asking for a standard input method.

  • I think compose key + character code is the way to go. You can't possibly have dedicated key, or key combo for that matter, for every unicode characters.
    – Bibek_G
    Jan 6, 2016 at 6:54
  • 2
    what do you mean by standard input method?
    – Pandya
    Jan 6, 2016 at 10:02

1 Answer 1


Try this: press ctrl-shft-U and then type the 4-digit code. This works on my Gnome shell desktop (Fedora 20, though). For example, when I type ctl-shft-U 2203 and then hit the space bar, it gives me ∃ . See http://library.gnome.org/users/gnome-help/stable/tips-specialchars.html.en

  • 4
    That could work, but is not very user friendly. I was thinking of some "input mode" (or simply Javascript browser code) which perhaps would allow me to type \forall followed by the escape key, or something similar. Jan 13, 2016 at 17:50

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