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| author | Egor Tensin <Egor.Tensin@gmail.com> | 2019-09-30 01:37:50 +0300 |
|---|---|---|
| committer | Egor Tensin <Egor.Tensin@gmail.com> | 2019-09-30 01:54:39 +0300 |
| commit | a960734e6f152d967405bde6e4718daf257043f0 (patch) | |
| tree | 4609e92ba7426684e65bc2107edbb1631a2245dc | |
| parent | add "Recurring decimals" (diff) | |
| download | blog-a960734e6f152d967405bde6e4718daf257043f0.tar.gz blog-a960734e6f152d967405bde6e4718daf257043f0.zip | |
work around GitHub limitations for MathJax support
| -rw-r--r-- | README.md | 27 | ||||
| -rw-r--r-- | _config.yml | 2 | ||||
| -rw-r--r-- | _includes/common/mathjax.html | 2 | ||||
| -rw-r--r-- | _includes/common/mathjax_workaround.md | 1 | ||||
| -rw-r--r-- | _posts/2019-09-30-recurring-decimals.md | 4 |
5 files changed, 27 insertions, 9 deletions
@@ -75,14 +75,29 @@ y = kx + b $$ ``` +[MathJax]: https://www.mathjax.org/ + +#### GitHub workarounds + MathJax version 3 is used, which is unsupported by Kramdown (which produces -`<script type="math/tex; ..."` tags, suitable for MathJax 2. +`<script type="math/tex; ..."` tags, suitable only for MathJax 2. This is why `math_engine` is set to `null` in _config.yml, making Kramdown -output block formulas wrapped in `$$` and inline formulas in `$` respectively. -MathJax is additionally customized to recognize `$` as an inline formula -delimiter in _includes/common/mathjax.html. - -[MathJax]: https://www.mathjax.org/ +output block formulas wrapped in `$$` and inline formulas in `$` respectively +([inside `<span class="kdmath">` elements][kramdown issue]). +Because if this, MathJax is additionally customized to recognize `$` as an +inline formula delimiter in _includes/common/mathjax.html. + +GitHub Pages [helpfully overrides] the `math_engine` setting in your +_config.yml, hardcoding it to `mathjax` instead of `null` (there's a related +[pull request]). +I couldn't find a better way than to override the setting in the markdown +document itself using + + {::options math_engine="+nil+" /} + +[kramdown issue]: https://github.com/gettalong/kramdown/issues/342 +[helpfully overrides]: https://help.github.com/en/articles/configuring-jekyll +[pull request]: https://github.com/github/pages-gem/pull/644 License ------- diff --git a/_config.yml b/_config.yml index c6d3334..b3dc57b 100644 --- a/_config.yml +++ b/_config.yml @@ -22,7 +22,7 @@ highlighter: rouge markdown: kramdown kramdown: - math_engine: null + math_engine: null # Ignored by GitHub Pages, yay, how fun! syntax_highlighter_opts: span: disable: true diff --git a/_includes/common/mathjax.html b/_includes/common/mathjax.html index 1d59f37..7110f57 100644 --- a/_includes/common/mathjax.html +++ b/_includes/common/mathjax.html @@ -1,6 +1,6 @@ {% if page.mathjax %} <script> -// See the README for explanation: +// See the README.md for explanation: MathJax = { tex: { inlineMath: [['$', '$']] diff --git a/_includes/common/mathjax_workaround.md b/_includes/common/mathjax_workaround.md new file mode 100644 index 0000000..9d0a77d --- /dev/null +++ b/_includes/common/mathjax_workaround.md @@ -0,0 +1 @@ +{::options math_engine="+nil+" /} diff --git a/_posts/2019-09-30-recurring-decimals.md b/_posts/2019-09-30-recurring-decimals.md index 83d949c..1151c19 100644 --- a/_posts/2019-09-30-recurring-decimals.md +++ b/_posts/2019-09-30-recurring-decimals.md @@ -6,6 +6,8 @@ excerpt: > category: Math mathjax: true --- +{% include common/mathjax_workaround.md %} + First, let's determine that $$ @@ -21,7 +23,7 @@ $$ 0.(9) = 1 $$ -This is counter-intuitive, but demonstrably true. +This may seem counter-intuitive, but demonstrably true. If $$0.(9) \neq 1$$, then $$\exists n \in \reals: 0.(9) < n < 1$$. To put it another way, there must be a number greater than 0.(9) and lesser than 1, equal to neither. |