an infinite number greater than two.
I never considered that!! Really a lovely sentiment
...but not actually true, of course.
FWIW, I've always liked the wave-top pi MUCH better than the flat-top (π, which looks boringly like "n") but I can't manage to drag an example to here. The wave-top makes it clear the lowercase pi is made up of three lines.
Though my math is a couple decades rusty, here's why -- relatively briefly
-- I don't like pi as a choice.
The concept "infinity" is represented by ∞, & then there's Cantor's transfinites (omega & aleph-null) & the resultant "Absolute Infinite" Ω.
Pi (π) is an
irrational number, meaning it can't be precisely defined by
a ratio of two integers -- that's about as "poly" as I can make it. It
does contain an (apparently) infinite series of digits, & there are various ways to apply infinite series to approximate pi.
The digit series of pi could be described as "an infinite & apparently random series of digits that never settle down & begin repeating" & thus pretty much defines the number as being
irrational
...which kinda amuses me when I apply THAT to nonmonogamy.
Makes it sound like we're agreeing with the mononormatives.
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So, most people recognize pi, even if they have onlythe vague notion that it has "something to do with circles." Which I figure is going to lead to being pestered by people about "wtf do you have to do with circles, dude?"
Getting past that, when I was learning calculus, the character was drawn as two vertical lines with a third line balanced on their tops -- now THAT kinda sounds like it's idealizing the unicorn myth, right? In any case, far better suited to "marriage + 1" rather than general nonmonogamy.
And the value represented by pi is 3.1415926...; no matter how you slice it, that's "three & a little more," which again sounds a lot like a closed triad leaving open the possibility of roping in another.
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If I had to choose a Greek letter, it'd be something much cooler
AND less recognized, first vote being
psi, ψ.
No good reason that a "P" needs to be explicitly incorporated, unless people WANT to intentionally exclude all other non-poly forms of nonmonogamy.
There are other choices that would have no real associations, though some just look neat &/or are easy to draw. Everyone ought to make a case. But lowercase omega looks like testicles -- ω.