# How do I get a literal ~ in math mode? [duplicate]

When I write $~$, I get a space. When I write $\~$, I get an error.

I am trying to write ~ to represent the equinumerous relation.

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 See e.g. How can I write tilde ~ in math mode? and its duplicates. – Torbjørn T. Jan 18 at 22:30 Thanks. I'm not sure why I didn't find that when I was adding the question. – merlin2011 Jan 18 at 22:35