一般的英文字母用\textbf{}或者\mathbf{}（在数学环境中）可使之显示为黑体。但是这两个命令对于希腊字幕不好用。如何才能使希腊字母也显示成黑体呢？在网上找到了下面两种方法。
1）
Setting bold Greek letters in LaTeX
The issue here is complicated by the fact that \mathbf (the command for setting bold text in TeX maths) affects a select few mathematical symbols (the uppercase Greek letters). However lower-case Greek letters behave differently from upper-case Greek letters (due to Knuth’s esoteric font encoding decisions). However, \mathbf can’t be used even for upper-case Greek letters in the AMSLaTeX amsmath package, which disables this font-switching and you must use one of the techniques outlined below.
The Plain TeX solution does work, in a limited way:
{\boldmath$\theta$}
but \boldmath may not be used in maths mode, so this ‘solution’ requires arcana such as:
$... \mbox{\boldmath$\theta$} ...$
which then causes problems in superscripts, etc.
These problems may be addressed by using a bold mathematics package.
* The bm package, which is part of the LaTeX tools distribution, defines a command \bm which may be used anywhere in maths mode.
* The amsbsy package (which is part of AMSLaTeX) defines a command \boldsymbol, which (though slightly less comprehensive than \bm) covers almost all common cases.
All these solutions cover all mathematical symbols, not merely Greek letters.
2）
Using Bold Greek Letters in LaTeX
Bold Greek letters are available using boldsymbol in the amsmath package.
\documentclass{article}
\usepackage{amsmath}
\begin{document}
Let $\boldsymbol\alpha$ be a vector. Call it $\boldsymbol\beta$.
\end{document}
(Note that this is not to be taken as an example of good mathematical exposition.)
原文的链接在此：
http://www.tex.ac.uk/cgi-bin/texfaq2html?label=boldgreek
http://math.berkeley.edu/~vojta/tex/samp-l/boldgreek.html
1）
Setting bold Greek letters in LaTeX
The issue here is complicated by the fact that \mathbf (the command for setting bold text in TeX maths) affects a select few mathematical symbols (the uppercase Greek letters). However lower-case Greek letters behave differently from upper-case Greek letters (due to Knuth’s esoteric font encoding decisions). However, \mathbf can’t be used even for upper-case Greek letters in the AMSLaTeX amsmath package, which disables this font-switching and you must use one of the techniques outlined below.
The Plain TeX solution does work, in a limited way:
{\boldmath$\theta$}
but \boldmath may not be used in maths mode, so this ‘solution’ requires arcana such as:
$... \mbox{\boldmath$\theta$} ...$
which then causes problems in superscripts, etc.
These problems may be addressed by using a bold mathematics package.
* The bm package, which is part of the LaTeX tools distribution, defines a command \bm which may be used anywhere in maths mode.
* The amsbsy package (which is part of AMSLaTeX) defines a command \boldsymbol, which (though slightly less comprehensive than \bm) covers almost all common cases.
All these solutions cover all mathematical symbols, not merely Greek letters.
2）
Using Bold Greek Letters in LaTeX
Bold Greek letters are available using boldsymbol in the amsmath package.
\documentclass{article}
\usepackage{amsmath}
\begin{document}
Let $\boldsymbol\alpha$ be a vector. Call it $\boldsymbol\beta$.
\end{document}
(Note that this is not to be taken as an example of good mathematical exposition.)
原文的链接在此：
http://www.tex.ac.uk/cgi-bin/texfaq2html?label=boldgreek
http://math.berkeley.edu/~vojta/tex/samp-l/boldgreek.html
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