According to the current version of the document "The Comprehensive LaTeX Symbol List", maintained by Scott Pakin and featuring more than 18000 symbols and associated macros, the following six packages provide macros called \circlearrowright
and \circlearrowleft
for use under pdfLaTeX:
amssymb
mathabx
MnSymbol
fdsymbol
boisik
stix
If you employ the unicode-math
package (and hence either LuaLaTeX or XeLaTeX), there are several unicode math fonts that provide macros called \circlearrowright
and \circlearrowleft
directly -- no need to load a separate math font package.