a nice non-linear recursion problem
18:47
a nice floor problem from the IMO long list.
17:07
Non-linear recursions are trickier (with a new technique!)
11:41
A nice suggested differential equation
51:16
Why can't you multiply vectors?
18:24
just an average recursion...OR IS IT?
23:14
From the IMO shortlist.
16:14
This integral looks crazy
13:16