LaTeX code for smile and frown symbol in Bloch's real analysis text

[Math Amateur]

In Bloch: The Real Numbers and Real Analysis we find, in the discussion on the construction of the rational numbers, a symbol for an equivalence relation that looks like a combination of a \smile and a \frown ... the symbol appears in Definition 1.5.1 and Lemma 1.5.2 below ... View attachment 7026Can anyone tell me the Latex code to form this symbol ...?

Peter

 

[MarkFL]

We have it as a symbol in our Quick $\LaTeX$ element, in the Algebra section, with the toolltip "Asymptotic To"...the code is:

\asymp

which produces:

$$\asymp$$

 

[Math Amateur]

We have it as a symbol in our Quick $\LaTeX$ element, in the Algebra section, with the toolltip "Asymptotic To"...the code is:

\asymp

which produces:

$$\asymp$$

Thanks Mark ...

Must go to the Linear and Abstract Algebra forum and get the guide ... the guide I have been using is the one from MHF ...

Peter

 

[MarkFL]

This is what I meant:

View attachment 7027

 

[Math Amateur]

This is what I meant:

Sorry Mark ... my silly confusion ...

... or since you guys are in the USA ... should I say, my bad ...

Peter

 

[Dethrone]

For future reference, there's also Detexify LaTeX handwritten symbol recognition

 

[MarkFL]

For future reference, there's also Detexify LaTeX handwritten symbol recognition

I'm thinking it would be cool to put a button somewhere in our editor that opens that page in a popup window. (Yes)