612
Haha that's really cool, funny number man
(mander.xyz)
A place for majestic STEMLORD peacocking, as well as memes about the realities of working in a lab.

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What exactly is advanced calculus? Abstract algebra, functional analysis or something else?
Nothing. It's a meaningless term. Some people use it to say "hard calculus" (multivariate, pdes, etc) and I suspect that's how it's being used here but, historically, it has mostly been used to refer to the introduction to real analysis courses found in books spike Spivak and Apostol.
Gauchy theorem and so
Gnarly PDEs aren't exactly the same beast as differentiating single variable polynomials.
Probably infinite series? Maybe differential equations, but I guess that's usually its own subject.
I would think at most institutions it would be calc 3 and beyond, or pretty close to?
A lot of majors don't take beyond 1 or 2.