No package is required to print the varphi symbol in a latex document. You just need to use the default command \varphi
.
Symbol/Unicode | Varphi/U+1D711 |
---|---|
Type of symbol | Greek small letter |
Package (requirement) | No |
Argument | No |
Latex command | \varphi |
Example | \varphi βΒ π |
\documentclass{article}
\begin{document}
\[ \varphi x(t)=\mathrm{E}\left[e^{itX}\right] \]
\[ \varphi x(-it)=M_X (t) \]
\[ \varphi _{X}(t)=\mathrm{E}\left[\exp \left(i\int _{\mathbf {R} }t(s)X(s)\,ds\right)\right] \]
\end{document}
Output :