what a great "double" functional equation!
10:10
what a nice functional equation!
18:36
A nice functional equation from Romania
11:25
a nice functional equation
16:38
an exponential Diophantine equation.
12:57
Measures: some surprising behaviors
13:44
on the growth of a nice recursive sequence
49:58
Full Meeting between President Trump, VP Vance and Ukrainian President Zelenskyy in Oval Office
18:01