In julia you can write subscripts by \_
for variable names. I was wondering if there is anything similar for writing fractions in variable names. Something like \frac{}{}
in LaTeX. I understand this may be harder as it takes two arguments. If there is none, I will use /
. But in this case I would like to use some enclosures to make clear what is being differentiated. I assume ()
is not usable? []
or {}
would be ok?
The subscripts or other non-latin names you see in Julia code are just normal unicodes the same as "regular" names. the LaTeX commands are only a function of Julia REPL to remember and input them.
As for unicode, in principle you can represent some simple fractions like ⁽²⁺ⁱ⁾⁄₍ₛ₊ₜ₎
, using the ⁄
(U+2044 Fraction slash) symbol and subscripts and superscripts. The rendering depends on your font, but do not expect a verticle layout in any current fonts.
However, Julia recognizes ⁄
(U+2044 Fraction slash, not the /
in your keyboard) as "invalid character" when used along during parsing. The same applies to \not
, which can only be used in conjunction with some operators, so it's not an option too.
As for the brackets and the normal /
, they are operators and are parsed differently. However, there is an (ugly) way to circumvent this: you can use macros to bypass the parsing and use strings as variable names. For example:
julia> macro n_str(name)
esc(Symbol(name))
end
@n_str (macro with 1 method)
julia> n"∂(2x + 3)/∂x" = 2
2
julia> 2n"∂(2x + 3)/∂x"
4