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  • 0 posts edited
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  • 128 votes cast
Mar
4
asked How can I solve this recurrence relation?
Jan
31
accepted Probability of winning a tie-break in tennis?
Jan
31
comment Probability of winning a tie-break in tennis?
@barakmanos, it shouldn't matter who serves first since the winner must lead by 2.
Jan
30
asked Probability of winning a tie-break in tennis?
Jan
30
comment Probability of winning a game in tennis?
@JiK, I have posted my attempt below, can you please check?
Jan
30
answered Probability of winning a game in tennis?
Jan
30
asked Probability of winning a game in tennis?
Dec
22
awarded  Constituent
Dec
9
awarded  Caucus
Nov
21
answered Replacement Cipher
Nov
9
comment 1/∞ is 0 or infinitesimal?
1/x as x approaches infinity is slightly different to saying what is 1/infinity. The limit is indeed 0, but the fraction 1/inf doesn't really make sense mathematically, but I guess I would describe it as infinitesimally small if I had to.
Sep
16
awarded  Great Answer
Jul
2
awarded  Curious
May
23
comment Algebra: What allows us to do the same thing to both sides of an equation?
Isn't it obvious? If quantity A is the same as quantity B, then if you do something to A, it is no longer the same as B, unless of course you do the same thing to B as well. For example if A = 5, and B = 5, then A + 1 = 6, and B+1 = 6. So if A = B, then A+1 = B+1
May
22
comment Easiest way to prove integral of $e^{ikx}$ is $\delta(k)$
@markleeds, unfortunately that answer makes use of the fourier theorem, but I am trying to use the above integral to prove the fourier theorem.
May
21
comment Easiest way to prove integral of $e^{ikx}$ is $\delta(k)$
@Mathlover, I'm asking how do you know that the integral of g(x) from -e to e is 2pi. You've stated it but haven't proven it, and this is the only step in the proof I don't understand.
May
21
comment Easiest way to prove integral of $e^{ikx}$ is $\delta(k)$
@Mathlover, I struggle with the last part of that proof. I can't understand the jump from lim sin(ax)/x = 2pidelta(k). How can we prove the limit is 2pidelta(k)?
May
21
comment Easiest way to prove integral of $e^{ikx}$ is $\delta(k)$
@Mathlover, thanks
May
21
asked Easiest way to prove integral of $e^{ikx}$ is $\delta(k)$
May
12
comment Prove that $u(x,t)=\int_{-\infty}^{\infty}c(w)e^{-iwx}e^{-kw^2t}dw\rightarrow 0$ if $x\rightarrow \infty$
proofwiki.org/wiki/Riemann-Lebesgue_Lemma