Parsing TeX to math.js

[Lakedaemon]

It would be nice, if at some point math.js could parse a subset of TeX into a node tree.

There is absolutely no urgency and it might be possible to take inspiration/use code from other projects for that :

MathJax manages with success to parse a lot of TeX commands and to coerce it into mathml (content and presentationnal).

Some possible applications of such a parser :

1. testing the toTex function and the fromTeX function (roundtrip)
2. getting input from users in the TeX language
3. import/reuse available snipets of TeX maths
4. data exchange math.js <-> TeX <-> MathMl
   ...

[josdejong]

Thanks for your suggestion!

[websimon]

I would also like this feature in mathjs, it would be very nice and useful for users who needs a simpler way of typing a mathematical expressions. In this way you might be able to let users type an expression with for example mathquill and parse it to maths js and make it computable.

[Kreijstal]

hmm I was looking for a feature like this

[ChristopherChudzicki]

@Kreijstal I also needed to convert LaTeX to MathJS. For my purposes, it has been good enough to:

1. replace all fractions: '\frac{a}{1 + \frac{b}{c}}' becomes '{a}/{1 + {b}/{c}}'
2. replace some names
   • '{' becomes '('
   • '\cdot' becomes '*'
   • etc

Then the resulting string can be sent to MathJS's parser. This certainly isn't perfect, but it's covered all the use-cases I need.

Here's links to my code. It's currently written for Babel with Flow annotations, but wouldn't be too hard to strip those:

• preprocessMathQuill.js (MathQuill is what generates my LaTeX)
• helpers.js defines replaceAll and findClosingBrace functions
• preprocessMathQuill.test.js fairly minimal tests of preprocessMathQuill

[magnum6actual]

@Kreijstal I also needed to convert LaTeX to MathJS. For my purposes, it has been good enough to:

1. replace all fractions: '\frac{a}{1 + \frac{b}{c}}' becomes '{a}/{1 + {b}/{c}}'

2. replace some names

   • '{' becomes '('
   • '\cdot' becomes '*'
   • etc

Then the resulting string can be sent to MathJS's parser. This certainly isn't perfect, but it's covered all the use-cases I need.

Here's links to my code. It's currently written for Babel with Flow annotations, but wouldn't be too hard to strip those:

• preprocessMathQuill.js (MathQuill is what generates my LaTeX)
• helpers.js defines replaceAll and findClosingBrace functions
• preprocessMathQuill.test.js fairly minimal tests of preprocessMathQuill

@ChristopherChudzicki needing to do the same. would love to take a look at what you built if you can share that project again.

[davidtranhq]

For anyone still looking for a solution to this, I wrote a library here: https://github.com/davidtranhq/tex-math-parser that parses TeX strings into MathJS expression trees.

[josdejong]

Nice, thanks for sharing @davidtranhq !