[Tex/LaTex] How to get bold Greek letters with mathptmx

boldsymbols

I'm currently using these packages in my document:

\usepackage{mathptmx}
\usepackage[margin=1.2in]{geometry}
\usepackage{fancyhdr}
\usepackage{amsmath, amsthm, amssymb, amsbsy}
\usepackage{graphicx}
\usepackage{hyperref}
\usepackage{enumerate}
\usepackage{enumitem}
\usepackage[utf8]{inputenc}
\usepackage[danish]{babel}
\usepackage[T1]{fontenc}
\usepackage{caption}
\usepackage{subcaption}

But when I try to use:

\boldsymbol{\sigma}

As and example, well, nothing happens. It's not bold. I've also tried \mathbf and such. But nothing happens.

I don't know if it is because I'm using the "Times New Roman"-like package ?

Can anyone help me out?

Best Answer

As a last resort, over-printing (or under-printing) as a method to simulate boldness (or fake bold) is an option using the contour package. It may come in handy when there is no bold version of a font/symbol available:

enter image description here

\documentclass{article}
\usepackage{mathptmx}% http://ctan.org/pkg/mathptmx
\usepackage{array,contour}% http://ctan.org/pkg/{array,contour}
\begin{document}
\begin{tabular}{rl@{\quad}>{\contourlength{0.01em}}l}
\verb|\sigma|: & $\sigma$ & $\sigma$ \\
\verb|\contour[1]{red}{$\sigma$}|: & \contour[1]{red}{$\sigma$} & \contour[1]{red}{$\sigma$} \\
\verb|\contour[10]{black}{$\sigma$}|: & \contour[10]{black}{$\sigma$} & \contour[10]{black}{$\sigma$} \\
\verb|\contour{black}{$\sigma$}|: & \contour{black}{$\sigma$} & \contour{black}{$\sigma$} \\
\verb|\contour*{black}{$\sigma$}|: & \contour*{black}{$\sigma$} & \contour*{black}{$\sigma$}
\end{tabular}
\end{document}

The default interface is \contour[<number>]{<color>}{<stuff>} that prints <number> copies of <stuff> under <stuff> using colour <color>. The default is 16 repetitions if none are specified, while the starred-version \contour* prints 32. \contourlength{<len>} sets the radius of the under-printing. The two column above are default (0.03em) and 0.01em.

To make the under-printing more obvious/clear, here's a close-up view of the above contours at the default setting:

enter image description here

And, for \contourlength{0.01em}:

enter image description here

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