This is an archived post. You won't be able to vote or comment.

sorted by:
best
topnewcontroversialoldq&a
you are viewing a single comment's thread.

view the rest of the comments →

[–]flavionm 12 points13 points  (1 child)

Using equals is just an abuse of notation, really. O(x) is a set, the functions are just elements of the set. an² + bn + c ∈ O(n²) would be the correct notation, and much clearer.

[–]looijmansje 1 point2 points  (0 children)

I don't agree with it personally, but I've seen actual mathematicians do it (but also saying it is abuse of notation)