1. How to bold face lower case Greek letters in Latex

 

In Latex \mathbf command doesn’t apply to lower case Greek letters.

 

One solution is to use the ‘bm’ package. Add the following line to the beginning of the document:

 

\usepackage{bm}

 

Then to use that in the document, do this:

\bm{your_mathsymbol}

2. Another thing I learnt today about integral sign is:

 

\int\limits^{1}_{0} will place the limits of an integral to be above and below the integral sign

 

But \int^{1}_{0} will place the limits of an integral to be to the side of the integral sign