In my experience with maths, there’s a whole bunch of different conventions all over the place, so it might’ve genuinely been how they were taught, even if you were taught differently…
Comment on Not that limit
carmo55@lemmy.zip 1 day agoThis is just not true. The normal limit we have here means a limit would have to exist from both directions and they should be equal.
One-sided limits would be denoted by x -> 5– and x -> 5+ or similar.
PS: in complex analysis, there is no distinction between +infty and -infty, so there it would be correct to say the function has limit infty at 5.
Ephera@lemmy.ml 23 hours ago
cows_are_underrated@feddit.org 22 hours ago
Yeah, that’s my experience too. When we did this in school we always defined from which side we were approaching the function.
JustAPenguin@lemmy.world 8 hours ago
You’re right. But in this case, which is the case I was referring to, there is no two sided limit. It is discontinuous. It is in this case which I was referring to. Sorry for not being clear.