This symbol $'$ for $p',q'$, etc; I know $'$, it is called prum(?) or something close to that, and $p',q'$ are p prum, q prum.
But what exactly is $'$ written or pronounced? Thanks.
And why is that called prum(?)?
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1It's called "prime". – Daniel Fischer Jun 05 '14 at 21:45
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why prime? it is not prime number. – miss-tery Jun 05 '14 at 21:45
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5https://en.wikipedia.org/wiki/Prime_(symbol)#History – parsiad Jun 05 '14 at 21:46
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Thanks all, any of this is good enough for an answer. – miss-tery Jun 05 '14 at 21:48
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@par Would you like to flesh your link out to an answer? – Daniel Fischer Jun 05 '14 at 22:03
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I've heard it called dash as well. Mostly when you're using it as a modified version version of another variable. e.g. p and p' (p dash) – Achal Jun 05 '14 at 22:11
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I'm still wondering why the word for inflection point in German comes out `watershed.' Also, what is a watershed. Meanwhile, Wendepunkt... – Will Jagy Jun 05 '14 at 22:19
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Previously: How do you pronounce the symbol $'$ in $f'$? – Jun 05 '14 at 22:25