backy/docs/themes/hugo-theme-relearn/exampleSite/content/shortcodes/math.en.md

+++ description = "Beautiful math and chemical formulae" title = "Math" +++

The math shortcode generates beautiful formatted math and chemical formulae using the MathJax library.

{{< math align="center" >}}

\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)

{{< /math >}}

{{% notice note %}} This only works in modern browsers. {{% /notice %}}

Usage

While the examples are using shortcodes with named parameter it is recommended to use codefences instead. This is because more and more other software supports Math codefences (eg. GitHub) and so your markdown becomes more portable.

You are free to also call this shortcode from your own partials.

{{% notice note %}} To use codefence syntax you have to turn off guessSyntax for the markup.highlight setting (see the configuration section). {{% /notice %}}

{{< tabs groupId="shortcode-parameter">}} {{% tab title="codefence" %}}

```math { align="center" }
$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$
```

{{% /tab %}} {{% tab title="shortcode" %}}

{{</* math align="center" */>}}
$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$
{{</* /math */>}}

{{% /tab %}} {{% tab title="partial" %}}

{{ partial "shortcodes/math.html" (dict
  "context" .
  "content" "$$left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$"
  "align"   "center"
)}}

{{% /tab %}} {{< /tabs >}}

Parameter

Name	Default	Notes
align	center	Allowed values are left, center or right.
<content>	<empty>	Your formuale.

Configuration

MathJax is configured with default settings. You can customize MathJax's default settings for all of your files thru a JSON object in your config.toml or override these settings per page thru your pages frontmatter.

The JSON object of your config.toml / frontmatter is forwarded into MathJax's configuration object.

See MathJax documentation for all allowed settings.

{{% notice note %}} To use codefence syntax you have to turn off guessSyntax for the markup.highlight setting. {{% /notice %}}

Global Configuration File

[params]
  mathJaxInitialize = "{ \"chtml\": { \"displayAlign\": \"left\" } }"

[markup]
  [markup.highlight]
    # if `guessSyntax = true`, there will be no unstyled code even if no language
    # was given BUT Mermaid and Math codefences will not work anymore! So this is a
    # mandatory setting for your site if you want to use Math codefences
    guessSyntax = false

Page's Frontmatter

+++
mathJaxInitialize = "{ \"chtml\": { \"displayAlign\": \"left\" } }"
+++

Examples

Inline Math

Inline math is generated if you use a single `$` as a delimiter around your formulae: {{</* math */>}}$\sqrt{3}${{</* /math */>}}

Inline math is generated if you use a single $ as a delimiter around your formulae: {{< math >}}$\sqrt{3}${{< /math >}}

Blocklevel Math with Right Alignment

If you delimit your formulae by two consecutive `$$` it generates a new block.

{{</* math align="right" */>}}
$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$
{{</* /math */>}}

If you delimit your formulae by two consecutive $$ it generates a new block.

{{< math align="right" >}}

\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)

{{< /math >}}

Codefence

You can also use codefences.

```math
$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$
```

$$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$$

Chemical Formulae

{{</* math */>}}
$$\ce{Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2-}$$
{{</* /math */>}}

{{< math >}}

\ce{Hg^2+ ->[I-] HgI2 ->[I-] [Hg^{II}I4]^2-}

{{< /math >}}