of them are defined; type `:digraphs` to get
the list. A convenient way to read the list of digraphs is to save them in a
file. From the shell: >
        vim +'redir >/tmp/vim-digraphs-listing.txt' +digraphs +'redir END' +q

Some of them are available with standard Vim digraphs:
	<< «    /0 ∅    !< ≮  ~
	>> »    Ob ∘    !> ≯  ~
	., …    00 ∞    (C ⊂  ~
	(U ∩    -: ÷    )C ⊃  ~
	)U ∪    (_ ⊆    >= ≥  ~
	?= ≅    )_ ⊇    =< ≤  ~
	(- ∈    ?= ≅    != ≠  ~
	-) ∋    ?- ≃  ~

The Greek alphabet is available with "*" followed by a similar Latin symbol: >
	*p π
	*t τ
	*X ×

Numbers, subscripts and superscripts are available with 's' and 'S':
	0s ₀    0S ⁰  ~
	1s ₁    1S ¹  ~
	2s ₂    9S ⁹  ~

But some don't come defined by default. Those are digraph definitions you can
add in your ~/.vimrc file. >
	exec 'digraph \\ ' .. char2nr('∖')
	exec 'digraph \< ' .. char2nr('≼')
	exec 'digraph \> ' .. char2nr('≽')
	exec 'digraph (L ' .. char2nr('⊈')
	exec 'digraph )L ' .. char2nr('⊉')
	exec 'digraph (/ ' .. char2nr('⊄')
	exec 'digraph )/ ' .. char2nr('⊅')
	exec 'digraph )/ ' .. char2nr('⊅')
	exec 'digraph U+ ' .. char2nr('⊎')
	exec 'digraph 0- ' .. char2nr('⊖')
	" Euler's constant
	exec 'digraph ne ' .. char2nr('𝑒')
	" Raku's atomic operations marker
	exec 'digraph @@ ' .. char2nr('⚛')

Alternatively, you can write Insert mode abbreviations that convert ASCII-
based operators into their single-character Unicode equivalent. >
	iabbrev <buffer> !(<) ⊄
	iabbrev <buffer> !(<=) ⊈
	iabbrev <buffer> !(>) ⊅
	iabbrev <buffer> !(>=) ⊉
	iabbrev <buffer> !(cont) ∌
	iabbrev <buffer> !(elem) ∉
	iabbrev <buffer> != ≠
	iabbrev <buffer> (&) ∩
	iabbrev <buffer> (+) ⊎
	iabbrev <buffer> (-) ∖
	iabbrev <buffer> (.) ⊍
	iabbrev <buffer> (<) ⊂
	iabbrev <buffer> (<+) ≼
	iabbrev <buffer> (<=) ⊆
	iabbrev <buffer> (>) ⊃
	iabbrev <buffer> (>+) ≽
	iabbrev <buffer> (>=) ⊇
	iabbrev <buffer> (\|) ∪
	iabbrev <buffer> (^) ⊖
	iabbrev <buffer> (atomic) ⚛
	iabbrev <buffer> (cont) ∋
	iabbrev <buffer> (elem) ∈
	iabbrev <buffer> * ×
	iabbrev <buffer> **0 ⁰
	iabbrev <buffer> **1 ¹
	iabbrev <buffer> **2 ²
	iabbrev <buffer> **3 ³
	iabbrev <buffer> **4 ⁴
	iabbrev <buffer> **5 ⁵
	iabbrev <buffer> **6 ⁶
	iabbrev <buffer> **7 ⁷
	iabbrev <buffer> **8 ⁸
	iabbrev <buffer> **9 ⁹
	iabbrev <buffer> ... …
	iabbrev <buffer> / ÷
	iabbrev <buffer> << «
	iabbrev <buffer> <<[=]<< «=«
	iabbrev <buffer> <<[=]>> «=»
	iabbrev <buffer> <= ≤
	iabbrev <buffer> =~= ≅
	iabbrev <buffer> >= ≥
	iabbrev <buffer> >> »
	iabbrev <buffer> >>[=]<< »=«
	iabbrev <buffer> >>[=]>> »=»
	iabbrev <buffer> Inf ∞
	iabbrev <buffer> atomic-add-fetch ⚛+=
	iabbrev <buffer> atomic-assign ⚛=
	iabbrev <buffer> atomic-fetch ⚛
	iabbrev <buffer> atomic-dec-fetch --⚛
	iabbrev <buffer> atomic-fetch-dec ⚛--
	iabbrev <buffer> atomic-fetch-inc ⚛++
	iabbrev <buffer> atomic-inc-fetch ++⚛
	iabbrev <buffer> atomic-sub-fetch ⚛−=
	iabbrev <buffer> e 𝑒
	iabbrev <buffer> o ∘
	iabbrev <buffer> pi π
	iabbrev <buffer> set() ∅
	iabbrev <buffer> tau τ
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