On Wednesday, October 28, 2015 at 8:56:44 AM UTC+1, DNF wrote: > > I don't think = and in represent an elegant duality. They seem a very odd > couple to me (even though I have been using = in Matlab for 15 years.) On > the other hand, = and ∈ do seem to offer an elegant duality, >
Sorry, of course I meant ∈ and 'in' are dually elegant, not ∈ and =.
