There is no default command to print the less-than or equivalent to symbol to a LaTeX document.
For this you need the amssymb package, this package provides a command called \lesssim
which allows you to print this symbol in the document.
Symbol/Unicode | Less-Than or Equivalent To/U+2272 |
---|---|
Type of symbol | Mathematics |
Package (requirement) | amssymb |
Argument | No |
Latex command | \lesssim |
Example | \lesssim → ≲ |
\documentclass{article}
\usepackage{amssymb}
\begin{document}
\[ a \lesssim b \]
\[ x_1 \lesssim x_2 \]
\[ \frac{1}{a_1} \lesssim \frac{1}{a_2} \]
\end{document}
Output :