Emacs: Xah Math Input Mode πŸ“¦

By Xah Lee. Date: . Last updated: .

xah-math-input.el is a emacs minor mode for inputting math symbols, emoji, or any Unicode characters.

xah math input mode 2021-08-02
M-x xah-math-input-list-math-symbols

Get it by Donation

Goto paypal.com, send $32 to Xah@XahLee.org (be sure to include your correct email address. I need that to send it to you.)

Write in message area: xah-math-input.el

How to Use

Alt+x global-xah-math-input-mode
Toggle on/off for all buffers.
Alt+x xah-math-input-mode
Toggle on/off for current buffer.

In lisp code for your emacs init file:

(global-xah-math-input-mode 1) ; turn on globally
(global-xah-math-input-mode 0) ; turn off globally

Type inf, then press Shift+Space, then it becomes ∞.

For the complete up-to-date list, Alt+x xah-math-input-list-math-symbols

The mode supports over 600 unique symbols, and you can add your own. Any unicode character, including emoji.

XML Abbreviations

All XML character entity abbrevs are supported. For example

copy β†’ Β©

[see HTML XML Entities]

Mathematica Abbrev

Most Mathematica's abbreviation is also supported. For example:

es β†’ βˆ…

Unicode by Decimal Number

Unicode by decimal can be entered like this:

945 β†’ Ξ±

(Note: alpha has abbrev of β€œa”. All Greek Alphabet has single letter abbrev.)

[see Unicode: Greek Alphabet Ξ± Ξ² Ξ³ Ξ΄ Ξ΅ ΞΆ Ξ·]

Unicode by Hexadecimal

Unicode by hexadecimal can be entered like this:


Change Activation Key

To change the activation key, put this in your Emacs Init File:

(require 'xah-math-input)
(define-key xah-math-input-keymap (kbd "S-SPC") nil) ; unset Shift+space
(define-key xah-math-input-keymap (kbd "<f8>") 'xah-math-input-change-to-symbol)

Add Abbrev, Add Symbol

To add/change a abbrev, Put this in your Emacs Init File:

(require 'xah-math-input)
(puthash "floral" "❦" xah-math-input-abrvs)

To find symbols, use Unicode Search πŸ˜„.

Get Unicode Font

For best result, you'll need a font that support Unicode. I recommend DejaVu Sans Mono. [see Best Unicode Fonts for Programer]

xah-math-input.el was named xmsi-mode.el

Emacs, insert unicode, emoji, math symbols