URL contains percentage symbol turning URL green and not showing in bibliography latex Overleaf LaTeX \usepackage{hyperref} not working

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  I typically use the LaTex/overleaf package 'TIPA' to type IPA characters in overleaf and it has always worked great. But recently, no velar nasals will compile in my document. I use the same command that I always have, \ng, but velar nasals are all absent from the document. Does anyone have an idea for how to fix this? Is there another way to type a velar nasal in overleaf?
• How to make MathJax faster?

  I was working on a website that contains a lot of mathematical expressions. I use MathJax with React (using 'react-mathjax-preview') but I noticed that rendering math equations is slow and can be noticed while refreshing the page. I compared with websites that are using MathJax like Mathematics Stack Exchange and I found that the equations are rendered faster (even with pages that contain a big amount of math expression). So why my math is rendered slower? And how to make it fast like Mathematics Stack Exchange?

  Note: I tried to use KaTex with react which was faster than MathJax, But there were some problems with the positioning of fractions and roots and the text style. So I returned to MathJax as it also provides more latex functions and is used more than KaTex.

  Note: The problem seems to be worse in cases where math expressions are contained in tables, as they are written in separated <MathJax /> components.

  For example, this piece of code is rendered slowly, however it contains only 9 math expressions. (some of the pages I work on contain more than 50 separated math expressions (even while using environments like 'align' environment).

  <div>
      <table className="table-style-a2">
          <thead>
              <tr>
                  <th>Radical in the integral</th>
                  <th>Trigonometric substitution</th>
                  <th>Hyperbolic substitution</th>
              </tr>
          </thead>
          <tbody>
              <tr>
                  <td><MathJax math={String.raw`$\sqrt{a^2-x^2}$`} /></td>
                  <td><MathJax math={String.raw`$x = a \sin (\theta)$`} /></td>
                  <td><MathJax math={String.raw`$x = a \tanh (\phi)$`} /></td>
              </tr>
              <tr>
                  <td><MathJax math={String.raw`$\sqrt{a^2+x^2}$`} /></td>
                  <td><MathJax math={String.raw`$x = a \tan (\theta)$`} /></td>
                  <td><MathJax math={String.raw`$x = a \sinh (\phi)$`} /></td>
              </tr>
              <tr>
                  <td><MathJax math={String.raw`$\sqrt{x^2-a^2}$`} /></td>
                  <td><MathJax math={String.raw`$x = a \sec (\theta)$`} /></td>
                  <td><MathJax math={String.raw`$x = a \cosh (\phi)$`} /></td>
              </tr>
          </tbody>
      </table>
  </div>
  
  \\ Just an example
  

  Thanks in advance.
• Latex expressions in pandas dataframes not rendering in vscode

  I am trying to set some labels and the caption of my dataframe using mathjax, but it doesn't render in vscode.

  For example, when I do

  import pandas as pd
  test = pd.DataFrame(index=["$\sigma$"])
  test
  

  I get this as output in my jupyter notebook:

  $\sigma$
  

  Instead of the letter σ. I get the right results if I do the same thing in JupyterLab (in Google Chrome).

  Note: Other packages that use mathjax seem to be working fine. Printing latex expressions in matplotlib, sympy and even cells marked with '%%latex' work fine.
• Change section text size in latex

  Is it possible to set text size of sections to a particular value, say 11pt?

  \documentclass{article} 
  \usepackage[utf8]{inputenc}
  
  
  \begin{document} 
  \section{Introduction} 
  Bla Bla 
  \section{Thank} 
  Bla Bla 
  \end{document}
  

  Here I want to set 'Introduction' & 'Thank' at 11 text-size.
• Manage the multiple row in Overleaf

  I have made a table with multiple columns and rows arguments like this

  \begin{table}[H]
  \centering
  \begin{tabular}{lccccc}
  \hline
  \multirow{2}{*}{Aspects} & Probability & \multicolumn{4}{c}{Methods} \\
  \cline{3-6}
  & for DE Genes          & Binomial Test & Tangram & stereoscope & BayesPrism\\
  \hline
  \multirow{3}{*}{AUC}  & 0.3   & 0.867 & 0.029 & 0.074 & 0.992 \\
                    & 0.1   & 0.722 & 0.023 & 0.015 & 0.987\\
                    & 0.05  & 0.512 & 0.055 & 0.025 & 0.972\\
  \hline
  \multirow{3}{*}{Best Thresholds} & 0.3   & ${0.135$ & 0.029 & 0.072 & $1e-10$ \\
                               & 0.1   & ${1e-60$ & 0.026 & 0.065 & $1e-10$\\
                               & 0.05  & $1e-60$ & 0.033 & 0.069 & $1e-10$\\
  \hline
  \end{tabular}
  \caption{The ROC Curve Summary for Data with 15 Clusters}
  \label{15 cluster summary}
  \end{table}
  

  It will give the results like this

  I want to make the entries "Best Thresholds" be in two rows (filling 3 rows arguments) so that the table is not too wide. Could anyone helps how to make it?