Solutions taken from ftp://tug.ctan.org/pub/tex-archive/info/Free_Math_Font_Survey/survey.html in TUG.
Use either txfonts or mathptmx for Times font support. I
personally prefer txfonts since its mathcal symbols look more
natural to me.
To use: include \usepackage{txfonts} or \usepackage{mathptmx} in