What package is needed for \circlearrowright and \circlearrowleft?

Question

On a few pages I found that the command for a clockwise arrow should be \circlearrowright:

• \circlearrowright - Tex Command
• LaTeX circlearrowright symbol
• The great, big list of LaTeX symbols

But, when I try it, I just get:

Undefined control sequence. \circlearrowright

I am using the package amsmath and additionally tried mathcomp. What do I need more?

Answer 1

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.

Answer 2

Can't resist to show the other possible way to find it, at https://detexify.kirelabs.org/classify.html:

I have the app on my phone and it's a lifesaver when writing math...