9.4.1 Maths Fonts
Just as we are able to change text fonts using
the commands \textrm
, \textbf
etc, we can also
use commands to change the maths font. Basic maths font changing
commands are shown in Table 9.1.
Command  Example Input  Corresponding Output 

(Computer Modern)  
\mathrm {<maths>} 
$\mathrm{xyz}$ 

\mathsf {<maths>} 
$\mathsf{xyz}$ 

\mathtt {<maths>} 
$\mathtt{xyz}$ 

\mathit {<maths>} 
$\mathit{xyz}$ 

\mathbf {<maths>} 
$\mathbf{xyz}$ 

\mathcal {<maths>} 
$\mathcal{XYZ}$ 

The calligraphic fonts via \mathcal
are only available for uppercase
characters[Better script fonts for maths].
Table 9.2 lists additional font commands supplied
with the amsmath and amsfonts
packages.
Command  Example Input  Example Output 

^{‡}\mathbb {<maths>} 
$\mathbb{A+B=C}$ 

^{‡}\mathfrak {<maths>} 
$\mathfrak{A+B=C}$ 

^{†}\boldsymbol {<maths>} 
$\boldsymbol{A+B=C}$ 

^{†}\pmb {<symbol>} 
$\pmb{+=}$ 

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