This is the creator of MathLingua, a unique language for easily describing mathematical definitions, theorems, axioms, and conjectures.

It is unique from LaTeX and theorem proving languages and has a different goal. See the documentation at www.mathlingua.org for more information.

This post is a follow-up to https://news.ycombinator.com/item?id=23960662 and many changes have been made to MathLingua since that time based on the feedback from that post.

In particular, since that time, I have added numerous improvements to the language to improve its usability, have drilled down on a particular use-case that I have documented more clearly, and have created a `mlg` command line tool to interact with the MathLingua language.

In particular, using `mlg check` one can check their MathLingua documents for errors, with `mlg document` one can create a dynamic static site of their documents suitable to be shared on GitHub pages, and with `mlg edit`, an in-browser IDE is available to edit your MathLingua documents with live previews, auto-complete, etc.

I really appreciate all of the feedback I received previously, and any and all feedback now is greatly appreciated.

Awesome project: I love the fact that you can click grab definitions, would make learning new symbols in a field a breeze. Question, though: is there a way to add custom definitions to symbols when you work in a field that uses symbols differently than the standard usage or symbols that have no standard usage (such as \bigoplus in latex)?

The next natural step would be write down all theorems from kindergarten to undergrad and make them reproduciable with http://leanprover.github.io/

This is very similar to Isabelle's Isar [1], except that Isar definitions and theorems can be formally verified. MMathLingua has no doubt a much better presentation layer for mathematics than Isabelle/Isar. This can be improved with a custom presentation layer, see for example rendering of topological groups theory from IsarMathLib [2] written in Isar (disclaimer - my project).

[1] https://isabelle.in.tum.de/Isar/

[2] https://isarmathlib.org/TopologicalGroup_ZF.html

I come from a very practical engineering math background.

I am really excited about this project because it makes it very clear how everything hangs together in a way that I haven't experienced before. The visual structure of a single definition/theorem/states is very helpful. Also, knowing how many 'levels' from the original concept I'm currently exploring while unpacking and re-packing just helps everything click into place.

Very, very cool.

This is great. You can easily look up a definition within a definition. No more context switching when trying to find Theorem 17.23, and then Definition 2.7.

Seems similar to http://openmath.org e.g. https://www.omdoc.org/about/ https://kwarc.info/systems/sTeX

Great project. BTW, I'm more and more interested in how to produce math for blind people. Although there is some recommendation about writring math in MathML, few (none?) screenreaders actually support it. Could this project help or could you tell me other resources about it? Thanks.

Does this handle ambiguity in definitions/standardization of expressions? Like, if I define entropy H(q,p) with mesures q (X), p(X) and with mesures a (y),b(y) , can I use the mathlingua parser to abstract this to the same representation? Or is it strictly a presentation layer?

Have you thought about using madoko [1] as a backend for math rendering?

Madoko has great support for rendering maths for the web, by far superior to KaTeX and MathJax.

[1]: http://madoko.org/reference.html

I think you might be interesting in this interactive papar: https://willcrichton.net/nota/

Oh my goodness, this is awesome. It's like the tactics language of Coq, but less irritating and pretty formatting. I will be recommending this to everyone!

I think you have a typo in the front page example. It says "F(x) is indefinite integral of f(x) on A", but the interval is "I".

So is it like math written in natural language but more structured and cross-referenced?