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visits member for 3 years, 5 months
seen Dec 16 at 9:29

Aug
19
comment Prove convexity/concavity of a complicated function
Is $f$ the function you wanted to optimize in your previous question? :D Edit: Oh no I didn't realized that $f$ is one-variable here!
Aug
17
comment How to prove that this sequence converges? ($a_n=a_{a_{n-1}}+a_{n-a_{n-1}}$)
I think the sequence is Hofstadter-Conway $10000 Sequence! mathworld.wolfram.com/…
Aug
15
answered Prove that $|S|< \frac{2p}{k+1}$
Aug
11
comment Prove that $\frac4{abcd} \geq \frac a b + \frac bc + \frac cd +\frac d a$
Brilliant! This solution covers the equality case (a, b, c, d) = (2, 0, 1, 1)! I thought only using dirty techniques would give that.
Aug
9
awarded  Editor
Aug
9
awarded  Teacher
Aug
1
comment Math notation for location of the maximum
en.wikipedia.org/wiki/Arg_max
Jul
26
comment Combined AM GM QM inequality
@picakhu: Really interesting inequallity. Did you found a "not interesting" proof? (like expanding all terms and using Muirhead or Schur technically).
Jul
24
accepted Deterministic algorithm for matching variables by only using restricted comparison
Jul
24
comment Deterministic algorithm for matching variables by only using restricted comparison
@Ilmari Karonen Sorry for confusion again. YES :-)
Jul
24
comment Deterministic algorithm for matching variables by only using restricted comparison
@joriki "deterministic" algorithm never uses a pure "ideal" random number generator. So it can use PRNG or whatsoever. However its efficiency is measured by the maximum of efficiency for all inputs can be made(efficiency for a input is measured by just time taken for that input).
Jul
24
comment Deterministic algorithm for matching variables by only using restricted comparison
@joriki Sorry for confusion. What I mean by randomized algorithm is that it uses pure "ideal" random number generator and its efficiency for a input is measured by the expected value of the time taken by the algorithm. The "randomized" algorithm's efficiency is the maximum of efficiency for all inputs can be made.
Jul
24
asked Deterministic algorithm for matching variables by only using restricted comparison
Jul
18
accepted A stronger version of discrete “Liouville's theorem”
Jul
17
awarded  Nice Question
Jul
17
awarded  Supporter
Jul
17
awarded  Scholar
Jul
17
awarded  Student
Jul
17
asked A stronger version of discrete “Liouville's theorem”