LaTeX.ipynb

Kernel: Unknown Kernel

import panel as pn

pn.extension('katex', 'mathjax')

The LaTeX pane enables rendering LaTeX equations as HTML using either the KaTeX or MathJax renderer.

You must load the desired renderer manually (e.g., pn.extension('katex') or pn.extension('mathjax')). If both are loaded, KaTeX is used by default.

Please note that both KaTeX and MathJax support only a subset of the features available in a full LaTeX renderer. For detailed information on supported features, refer to their respective documentation.

Parameters:

For details on additional options for customizing the component, refer to the layout and styling how-to guides.

• object (str or object): A string containing LaTeX code, an object with a _repr_latex_ method, or a SymPy expression.

• renderer (object): The current renderer; must be one of the available options.

• styles (dict): A dictionary specifying CSS styles.

---

A LaTeX pane will render any object with a _repr_latex_ method, SymPy expressions, or any string containing LaTeX. Any LaTeX content should be wrapped in $...$ or \(...\) delimiters, for example:

latex = pn.pane.LaTeX(
    r'The LaTeX pane supports two delimiters: $LaTeX$ and \(LaTeX\)', styles={'font-size': '18pt'}
)

latex

Its important to prefix your LaTeX strings with an r to make the string a raw string and not escape the \ character.

pn.Column(
    pn.pane.LaTeX("$\frac{1}{n}$"), # Will not work
    pn.pane.LaTeX(r"$\frac{1}{n}$")
)

The LaTeX pane can be updated like other panes:

latex.object = r'$\sum_{j}{\sum_{i}{a*w_{j, i}}}$'

Lets change it back:

latex.object = r'The LaTeX pane supports two delimiters: $LaTeX$ and \(LaTeX\)'

If both renderers have been loaded we can override the default renderer:

pn.pane.LaTeX(r'The LaTeX pane supports two delimiters: $LaTeX$ and \(LaTeX\)', renderer='mathjax', styles={'font-size': '18pt'})

And can also be composed like any other pane:

maxwell = pn.pane.LaTeX(r"""
$\begin{aligned}
  \nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} & = \frac{4\pi}{c}\vec{\mathbf{j}} \\
  \nabla \cdot \vec{\mathbf{E}} & = 4 \pi \rho \\
  \nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} & = \vec{\mathbf{0}} \\
  \nabla \cdot \vec{\mathbf{B}} & = 0
\end{aligned}
$""", styles={'font-size': '24pt'})

cauchy_schwarz = pn.pane.LaTeX(object=r"""
$\left( \sum_{k=1}^n a_k b_k \right)^2 \leq \left( \sum_{k=1}^n a_k^2 \right) \left( \sum_{k=1}^n b_k^2 \right)$
""", styles={'font-size': '24pt'})

cross_product = pn.pane.LaTeX(object=r"""
$\mathbf{V}_1 \times \mathbf{V}_2 =  \begin{vmatrix}
\mathbf{i} & \mathbf{j} & \mathbf{k} \\
\frac{\partial X}{\partial u} &  \frac{\partial Y}{\partial u} & 0 \\
\frac{\partial X}{\partial v} &  \frac{\partial Y}{\partial v} & 0
\end{vmatrix}
$""", styles={'font-size': '24pt'})

spacer = pn.Spacer(width=50)

pn.Column(
    pn.pane.Markdown('# The LaTeX Pane'),
    pn.Row(maxwell, spacer, cross_product, spacer, cauchy_schwarz)
)

Controls

The LaTeX pane exposes a number of options which can be changed from both Python and Javascript. Try out the effect of these parameters interactively:

pn.Row(latex.controls(jslink=True), latex)

Sympy

Panels LaTeX pane can render Sympy expressions as shown below:

import sympy as sp
import panel as pn

pn.extension("mathjax")

# Define a symbol and a symbolic expression using SymPy
x = sp.symbols('x')
expression = sp.integrate(sp.sin(x)**2, x)

# Create a LaTeX pane to display the expression
latex_pane = pn.pane.LaTeX(expression, styles={'font-size': '20px'})

# Serve the panel
pn.Column(
    "# A sympy expression rendered in Panel: ", latex_pane
)