Qmathpartir: Mathpartir Extension For Quarto

This Quarto (and Pandoc) filter implements a partial compatibility package for Didier Remy's LaTeX 2e package mathpartir.sty.

Installing

quarto add bechang/qmathpartir

This will install the extension under the _extensions subdirectory. If you're using version control, you will want to check in this directory.

Loading

To use the extension, add the following to your document's metadata:

filters:
- quarto
- qmathpartir
format:
  html:
    css: _extensions/bechang/qmathpartir/qmathpartir.css

While not required, you may apply the qmathpartir filter after the quarto filters have been applied as shown above.

For any html format, the css file _extensions/qmathpartir/qmathpartir.css should be included to apply flex-flow styles to the .mathpar blocks. We intentionally do not make this extension a custom format to enable to use this extension with any appropriate format.

Using

Div blocks with the .mathpar class are processed so that each paragraph is an inline math element $...$:

::: {.mathpar}
e

\text{expression}\quad e ::= n \mid e_1 + e_2

\text{expression $e$}
:::

Text wrapped in the \text{...} command prevents the element from being placed into math.

The \text{...} works just at the top-level of a .mathpar.

A limited form of the \inferrule (or \infer) command can be used for type setting inference rules.

::: {.mathpar}
\infer[TypePlus]{
  \Gamma \vdash e_1 : \int
  \and
  \Gamma \vdash e_1 : \int
}{
  \Gamma \vdash e_1 + e_2 : \int
}
:::

You can also use \inferlab{label}{premises}{conclusion} to place a label above the inference rule, or \inferright{label}{premises}{conclusion} to place a label on the right of the inference rule.

::: {.mathpar}
\inferright{TypePlus}{
  \Gamma \vdash e_1 : \int
  \and
  \Gamma \vdash e_1 : \int
}{
  \Gamma \vdash e_1 + e_2 : \int
}
:::

You can also use code blocks with the .mathpar class:

```mathpar

``` {.mathpar}

```math {.mathpar}

Quirks

Commands with symbols (e.g., \;) require an extra backslash, as in the following:

::: {.mathpar}
\alpha\\;\beta
:::

Example

Here is the source code for a minimal example: example.md.

Version History

• v1.3.0 2025-09-01 Add command for typesetting label on the right (#15)
• v1.2.2 2024-10-09 Remove \small for better Mathjax compatibility
• v1.2.1 2024-10-09 Update \small to \small{} for better Mathjax compatibility (#14)
• v1.2.0 2024-09-28 Add basic css for mathpar blocks (#10-#13)
• v1.1.2 2024-09-24 Bugfix: Fix inferrule commands (#9)
• v1.1.1 2024-09-20 Bugfix: Non-mathpar code blocks should not be translated (#8)
• v1.1.0 2024-09-20 Add support for mathpar code blocks (#4-#7)
• v1.0.2 2024-01-12 Bugfix: Only insert commands in non-tex output (#3)
• v1.0.1 2024-01-12 Bugfix: Insert tex commands for Mathjax (#1)
• v1.0.0 2023-12-26 Initial version.