Math Is Fun Forum

Hi,

I have noticed that there are some symbols that are used in Modern (abstract) Algebra, that aren't necessarily listed in the math reference. "oplus", indicating a direct product between 2 groups, is one such example. I would like to track down a few others.
My most pressing need, is the sign for "is isomorphic to". (a tilde above an equal sign) How do I make this?

Please help.

I didn't find the right solution from the Internet.

References:-
https://forum.openoffice.org/en/forum/viewtopic.php?f=12&t=93851
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Thanks!