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

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@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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