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Hello,

I was wondering if someone could help me with the following problem. I am trying to define a new command \bf so that \bf{a} gives \textcolor{red}{\textbf{a}}. So far I have defined

\renewcommand{\bf}{\textbf} so that \bf{a} gives \textbf{a}.

but i don't know how to incorporate the ...

Thank you very much for your help. I had however, another small issue which I cannot find the solution to and I was wondering if you know a solution to this by any chance:

After colouring several separate cells, I would like to put a frame around them. i.e. in your matrix I would like to colour ...

Hello,

I am trying to put coloured boxes around certain minors of an nxn matrix, but am unable to find anywhere on the web how to do this, and I was therefore hoping someone may have a suggestion on how to do this. Thank you in advance,

Jong-il