Re: [Felix-language] [felix] Maths DSSL

[Ryan G. <ry...@gm...>]

Yeah, I still have to try the KaTeX stuff I was working on. Got stumped
temporarily because I couldn't find an alternative to \DeclareMathOperator.


On Fri, Apr 24, 2015 at 2:56 AM, john skaller <sk...@us...
> wrote:

> The below will give cute display in Felix code, if displayed by flx_web.
> The "font" operators are just ordinary functions .. so you have to actually
> define them if you want stuff to work!
>
>
> ////////////////////////////////////////////////////////////////////////////////
> // ordinary and mathmode
> var x = X; // ordinary
> var x = \(X\); // mathmode
>
> // these are all TeX commands so x ^ \font y
> // typesets correctly: note \sin is an OP symbol
> // so x ^ \sin y fails, and x ^ \Gamma y works
> // since \Gamma is an ORD, but the y is not raised.
>
> // font operators
> var x = \(\mathrm X\); // mathrm
> var x = \(\mathit X\); // mathit
> var x = \(\mathfrak X\); // mathfrak
> var x = \(\mathbb X\); // mathbb
> var x = \(\mathbf X\); // mathbf
> var x = \(\mathcal X\); // mathcal
> var x = \(\mathscr X\); // mathscr
> var x = \(\mathsf X\); // mathscr
> var x = \(\mathtt X\); // mathtt
>
> // modifiers
> var x = \(\acute X\); // acute
> var x = \(\check X\); // check
>
> var x = \( x ^ \binom {\mathtt x} {\mathtt y} \);
> ///////////////////////////////////////////////////////////////
>
> However there are a couple of "gotchas". The first is that in TeX
> in math mode a variable is a single character. But that's NOT how
> Felix would interpret
>
>         f ABC
>
> is we happen to write
>
>         \( \mathcal ABC \}
>
> then the \mathcal function will apply to variable ABC, but it will
> only display caligraphic symbol A. This is similar to:
>
>         xyz
>
> which maths thinks is three variables but Felix thinks is one.
> The typeset version is math italic, and it reads OK in this case
> but really, it should be typeset in teletype font and boxed into
> a single atom:
>
>         \mathtt {xyz}
>
> To make this work *properly* will have to fiddle with flx_web's
> flx2html plugin so that the actual characters put in the HTML
> are fudged even more than at present: in particular {}
> inserted like above will be invisible, so the "effect" which is applied
> to something had better be visible to the reader (because now the
> grouping symbols will be gone).
>
> At present, if MathJaX isn't available the code is "more or less" raw
> as you wrote it in your editor. With improved fudging for more
> betterer display (sic) this distance between what you wrote and the
> HTML will be much larger.
>
> --
> john skaller
> sk...@us...
> http://felix-lang.org
>
>
>
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-- 
Ryan
[ERROR]: Your autotools build scripts are 200 lines longer than your
program. Something’s wrong.
http://kirbyfan64.github.io/