424 reputation
28
bio website
location France
age 20
visits member for 2 years, 7 months
seen Jan 18 at 15:32

Jul
12
comment Will the ball hit the wall?
I unfortunately got a "This video has been blocked in your country"
Jul
12
comment Will the ball hit the wall?
Thanks for your answer !
Feb
1
comment How to maximize chances to win?
Interesting explanation. Thanks !
Feb
1
comment How to maximize chances to win?
Thank you for the help.
Feb
1
comment How to maximize chances to win?
Thank you ! I discovered this game a few days ago and was pretty interested in the math behind.
Oct
14
comment Sum of a nearly classic series
I changed the LHS.
Sep
16
comment Convergence of a series?
Right, I was talking about $\sum u_n$
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Seems really nice though I can't understand why the line is $\sqrt{ab}$ long
Sep
4
comment Inequality proof on a sequence
Thank you for the really clear answer !
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
Well, it was really simple... Sorry for the beginner's question.
Sep
4
comment Prove that $\sqrt{a}\leq\frac{1+a}{2}$
No I don't already know this one.
Jun
19
comment Derivative of a composition
This proof seems really nice. In fact, I tried it this way... But how do you expand $f\bigl(g(x)+hg'(x)+o(h)\bigr)$ ? (without any hypothesis on what function $f$ is)
Jun
19
comment Derivative of a composition
Yes, thank you for the precision !
Jun
7
comment Where does complex exponential come from?
Thank you for the answer. This sounds now really clear to me.
May
31
comment Sum of $\cos(k x)$
It was what I was looking for to go on. Thank you !
May
31
comment Sum of $\cos(k x)$
Thank you for your answer !
May
31
comment Sum of $\cos(k x)$
I get $\frac{\cos{x}-\cos{(n+1)x}+\cos{nx}-2}{2-2\cos{x}}$. It may be false though...
May
31
comment Sum of $\cos(k x)$
It was a mistake in the question, the sum is on k and x is a variable. I edited it.
Mar
13
comment Simplify arithmetic equation
Interesting algorithm indeed.
Mar
13
comment Simplify arithmetic equation
That was the proof I was trying to find myself. Thank you !