# [OS X TeX] Latex symbol for "define equal"

Themis Matsoukas tmatsoukas at icloud.com
Sat Aug 18 18:55:50 EDT 2018

> On Aug 18, 2018, at 9:46 AM, Gary L. Gray <euler at psu.edu> wrote:
>
>> On Aug 18, 2018, at 7:21 AM, Themis Matsoukas <tmatsoukas at icloud.com> wrote:
>>
>> What is the accepted symbol in math for “equal by definition” and how to get in latex? I have been using \equiv but I have seen “:=“, equal sign with a triangle on top, or “def” on top of =.
>
> I have seen it done in many ways, but I have always used \equiv. I would simply state that when that symbol is used, it means “equal to by definition”.
>
> Gary

Its good to know that \equiv is acceptable.

Thanks

Themis