> but this is a very standard symbol [...] especially one targeted at people studying mathematics I've studied maths at university level and I didn't recognise

> but this is a very standard symbol [...] especially one targeted at people studying mathematics I've studied maths at university level and I didn't recognise phi (I thought of it as "that squiggle") in that context. I mean I probably could've guessed it's name was psi or phi or somesuch, but I certainly wouldn't have been sure.