6 ms·
Author here. Ask me anything.
by yig 4y ago
Author here. Ask me anything.
- layer8 4y agoIs this example under the Language Reference link correct? It seems to be missing a closing brace. A_ij = { 1 if (i,j) ∈ E 0 otherwise where A ∈ ℝ^(n × n) E ∈ { ℤ × ℤ } n ∈ ℤ
- yig 4y agoIt's not common to close that brace when writing math. (I've not seen it.)
- layer8 4y agoAh, right, I see now what is is, I was confused. Another thing I find confusing are the braces around ℤ × ℤ. They seem to be unnecessary (it wouldn’t make much sense for ∈ to have higher precedence than ×), and/or would imply a singleton set containing the set ℤ × ℤ as its only element.
- jamessb 4y agoI wonder whether adding a brace for each row would clarify the notation, by more closely resembling a single multi-line brace: A_ij = { 1 if (i,j) ∈ E { 0 otherwise where A ∈ ℝ^(n × n) E ∈ { ℤ × ℤ } n ∈ ℤ
- xigoi 4y agoIf they want it to look like actual math notation, they might as well: A_ij = ⎰ 1 if (i,j) ∈ E ⎱ 0 otherwise where A ∈ ℝ^(n × n) E ∈ { ℤ × ℤ } n ∈ ℤ
- yig 4y agoUnicode actually has semantic symbols that could be used for a nicer 2D monospaced layout here, such as ⎧ ⎪ ⎨ ⎩ ( (LEFT CURLY BRACKET UPPER HOOK, MIDDLE PIECE, LOWER HOOK, and CURLY BRACKET EXTENSION). With more conditional rows, you could use these. One downside is that you would have to do a 2D parse, since the = wouldn't be on the first line. We've been loath to go there. It also seems painful as a user to have to type all the right bracket symbols in all the right places. We do support the Unicode ⎡|⎦ symbols for matrices. The grammar is that a matrix starts with either [ or ⎡ and ends with either ] or ⎦. Rows can be optionally surrounded by |. I find this too cumbersome to use myself.
- yig 4y agoI like this. I created a GitHub issue: https://github.com/iheartla/iheartla/issues/138 https://github.com/iheartla/iheartla/issues/138
- xeonmc 4y agoWhy not use the haskell guard syntax? A_ij = | 1 if (i,j) ∈ E | 0 otherwise where A ∈ ℝ^(n × n) E ∈ { ℤ × ℤ } n ∈ ℤ
- yig 4y agoI (speaking as a designer of I Heart LA empathizing with a user) wouldn't have thought to use that character as an approximation of {.
- wodenokoto 4y agoIt must require special editors or plugins. I have no idea how to type all those "chalkboard" math symbols.
- jamessb 4y agoThe docs [1] include a table of symbols you can copy/pate from, and lists shortcuts that will be expanded by the IDE/online editor [2] - these mostly look like the LaTeX commands for the symbols (some are more concise, like \R and \Z as shortucts for \mathbb{R} and \mathbb{Z}). It would be useful if there was something like a help button in the IDE that opened this table in a modal, rather than just a link. [1]: https://github.com/iheartla/iheartla/wiki/Keywords-And-Special-Symbols#special-symbols https://github.com/iheartla/iheartla/wiki/Keywords-And-Speci... [2]: https://iheartla.github.io/iheartla/ https://iheartla.github.io/iheartla/
- wodenokoto 4y agoI foresee a latex like language that can compile to iheartla
- bmn__ 4y agoAny particular reason the Mathjax is gimped? When I bring up the context menu for the compiled result on <https://iheartla.github.io/iheartla/ https://iheartla.github.io/iheartla/>, my preferred renderer MathML is missing. I noticed right away that something is wrong because the result objectively looks bad, the bracket parts are of differing width, various surrounding elements do not align with the contained content, and also the text has terrible kerning. <https://files.catbox.moe/wp2r0t.webp https://files.catbox.moe/wp2r0t.webp> Compare with e.g. <https://codimd.web.cern.ch/features#MathJax https://codimd.web.cern.ch/features#MathJax> which has much more options to choose from as renderer and its output as MathML is exceedingly pleasing to look at.
- yig 4y agoWe're using MathJax 3.x, which dropped support for inserting MathML into the DOM due to uneven browser support [0]. The example you linked uses MathJax 2.x. [0]: https://docs.mathjax.org/en/latest/output/mathml.html https://docs.mathjax.org/en/latest/output/mathml.html
- bmn__ 4y agoThanks for taking the time to investigate and explain the problem. I understand you're not at fault but the maintainers upstream, yet I can't help but be disappointed. Removing MathML doesn't help anyone, the user just has a worse experience; it's caused by the same brainrot as with Gnome.