The LaTeX command for lessapprox (⪅) is \lessapprox.
\lessapproxWriting a paper? The table generator and the BibTeX cleaner are one click away, no account.
Write \lessapprox inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. This symbol needs the amssymb package, so add \usepackage{amssymb} to your preamble.
As a relation, \lessapprox gets a thick space on each side, and a long inline formula may break after it. With unicode-math under XeLaTeX or LuaLaTeX, typing ⪅ in a formula gives the same symbol.
$a \lessapprox b$Open this example in the live preview: it renders as you type, with no compiler and no signup.
Relation symbols in LaTeX: the full table or search all 350+ LaTeX symbols.
Use \lessapprox in math mode after adding \usepackage{amssymb} to your preamble. For example, $a \lessapprox b$.
It comes from the amssymb package: add \usepackage{amssymb} to your preamble.