example.qmd

---
title: "Mathjax3 Equation Numbers Example"
filters:
  - mathjax3eqno
number-sections: true  
---

# Intro
Here we look at Equations \eqref{tonull}, \eqref{eq-toinf} and \eqref{eq-toone}. 

\begin{equation} \label{tonull} \tag{$\ast$}
   \lim_{n\to\infty} \exp(-n) = 0
\end{equation}

and
$$
 \lim_{n\to\infty} \frac{n+1}{n} = 1
$${#eq-toone}

# Second section
Here is another important equation:
$$
   \lim_{n\to\infty} \exp(n) = \infty \tag{$\infty$}
$${#eq-toinf}

and never forget to mention
\begin{equation}
a^2 + b^2 = c^2
\end{equation}
where
\begin{align}
  \notag a&= 3\\
  b&=4
\end{align}
or

## Einstein!
$$
  e = mc^2
$${#eq-emc2}  

but this one is unnumbered:
\begin{equation*}
  1 + 1 = 4 
\end{equation*}

The next equation features a manual section prefix number *in html format*. Command `setNewSection` is meant as a workaround for quarto books. Equation numbering by section does work when rendering to pdf.

$$\setNewSection{17}
0 = 0
$${#eq-truezero}