For more comprehensive information on font use in /, see the / font guide (fntguide.tex) or The / Companion [3]. Many users of / also obtain an auxiliary collection of math fonts known as `AMSFonts'. The basic set of math font commands in / includes mathbf, mathrm, mathcal, mathsf, mathtt, mathit. Additional math alphabet commands are available through the packages amsfonts and eucal, if the requisite fonts are installed on your system (see amsfonts).