ript src="pkgdown.js"></script>



  <link href="extra.css" rel="stylesheet">
  

<meta property="og:title" content="Page not found (404)" />
<meta property="og:image" content="/logo.png" />
<meta name="twitter:card" content="summary" />




<!-- mathjax -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/MathJax.js" integrity="sha256-nvJJv9wWKEm88qvoQl9ekL2J+k/RWIsaSScxxlsrv8k=" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.5/config/TeX-