π can stand for a variety of things in maths, but is 3.14159... the only constant it's conventionally used for?

@christianp I've seen applications where subscripts were added to $$\pi$$ to denote a constant not quite related to the circle; would that count?

@tpfto I think not, for the specific thing I'm working on. But out of curiosity, what values did the subscripted π take?

@christianp m-hikari.com/ams/ams-2012/ams- was one of the papers I had in mind, where for a real $$p$$, there is an associated version of $$\sin$$, $$\cos$$, and $$\pi$$. (The usual ones correspond to $$p=2$$.)

@christianp ...and now I just remembered that someone thought to look at a $$q$$-analog of $$\pi$$: mathworld.wolfram.com/q-Pi.htm

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