# Help:Mathematics

• Math is handled by the LaTeX typesetting system
• Don’t use equation numbers
• Indent block equations with a colon (see examples below)
• Mediawiki will render HTML characters for short equations, and PNG images for longer ones
• To force image rendering, add a space at the end of the equation with a solidus (backslash) followed by a space

## Examples

Example short equation: $E=mc^{2}$ Example short equation with forced image rendering, using a space at the end of the equation:

$E=mc^{2}\$ Longer equations render as images regardless; here's the Aki-Richards equation:

$R_{\mathrm {PP} }(\theta )={(1+\tan ^{2}\theta )\,{\frac {\Delta I_{\mathrm {P} }}{2I_{\mathrm {P} }}}}\ \ -\ \ {8\left({\frac {V_{\mathrm {S} }}{V_{\mathrm {P} }}}\right)^{2}\sin ^{2}\theta \,{\frac {\Delta I_{\mathrm {S} }}{2I_{\mathrm {S} }}}}\ \ -\ \ {\left[{\frac {1}{2}}\tan ^{2}\theta -2\left({\frac {V_{\mathrm {S} }}{V_{\mathrm {P} }}}\right)^{2}\sin ^{2}\theta \right]{\frac {\Delta \rho }{\rho }}}$ ## Style

• Constants and names or label are roman (i.e. upright, not italic): VP. Use \mathrm{P} in LaTeX math.
• Pi, e, the differential d, and lots of other symbols are usually roman
• Variables are italic (the default character style in LaTeX math)
• Vectors are roman and bold (use \mathbf{} — it's best to avoid \vec{}, which uses the arrow notation)
• Use the built-in LaTeX functions for \sin, \log, etc.