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

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@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

@tpfto @christianp
I've seen this in the context of Lᵖ-space circles and the ratio C/D thereof.

@bmreiniger @tpfto yes, that's where I've seen it. The diagrams in @tpfto's linked paper led me to think it was the same sort of thing, but I think they generalised it even further than that, at first glance

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