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| bio | website | |
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| location | ||
| age | ||
| visits | member for | 2 years, 10 months |
| seen | 1 hour ago | |
| stats | profile views | 8,187 |
Don't have much time these days...
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May 5 |
answered | Prove $(\dfrac{2}{5})^{\frac{2}{5}}<\ln{2}$ |
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May 3 |
revised |
Find all functions $f$ that assign a real number $f(x)$ to every real number $x$ . . . edited tags |
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May 3 |
revised |
Find all functions $f$ that assign a real number $f(x)$ to every real number $x$ . . . added 56 characters in body |
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May 3 |
answered | Find all functions $f$ that assign a real number $f(x)$ to every real number $x$ . . . |
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May 3 |
awarded | Nice Answer |
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May 3 |
comment |
is there a name for this function (parity of a finite sequence)? @StefanSmith: When talking about the parity of a permutation, you obviously need to have the identity permutation in mind. All I am saying is that talking about the increasing is just a distraction. If Matlab can sort, and compute the sign of a permutation, it can do what you want. |
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May 3 |
revised |
a sequence $\{s_n\}$ with $\sum s_n$ convergent rolled back to a previous revision |
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May 3 |
comment |
a sequence $\{s_n\}$ with $\sum s_n$ convergent @Ultra3: Please don't change the question like that (after getting multiple answers). Ask a new one. I am rolling it back. |
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May 3 |
comment |
is there a name for this function (parity of a finite sequence)? Isn't it just the sign of a permutation? (No idea about matlab). Also, the talk about increasing seems to be unnecessary. Replace each $x_i$ with the rank in the increasing order, and talk about the sign of that... |
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May 3 |
revised |
Solve $\sin(x)+2\sin(x)\cos(x)=\pi/4$ deleted 66 characters in body |
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May 3 |
comment |
Solve $\sin(x)+2\sin(x)\cos(x)=\pi/4$ @Ovi: $2 \sin x \cos x = \frac{\pi}{4} - \sin x$ and square it and use $\cos^2 x = 1 - \sin^2 x$. Actually, that is only one quartic! |
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May 3 |
comment |
Solve $\sin(x)+2\sin(x)\cos(x)=\pi/4$ @anorton: Solve by hand by computer :-) |
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May 3 |
answered | Solve $\sin(x)+2\sin(x)\cos(x)=\pi/4$ |
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May 3 |
revised |
Is $u_n\le(1-a)^n\forall n\in\mathbb{N}$? edited tags |
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May 3 |
comment |
Ramanujan style nested differential Equation How do you exactly define that repeated differential equation? If we cut-off at $n$, don't we get $y_n = n! \frac{d^n y_n}{dx^n}$? |
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May 2 |
revised |
Find the limit of $ x_n = \prod_{j=2}^{n} \left(1 - \frac{2}{j(j+1)}\right)^2$ edited tags; edited title |
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May 2 |
answered | Is $u_n\le(1-a)^n\forall n\in\mathbb{N}$? |
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May 2 |
answered | If $p$ be a prime and r be any integer, $0 < r < p$ then $\frac{(p-1)!}{r!(p-r)!}$ is an integer. |
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May 2 |
comment |
Express an even number as a sum of primes Is it April $1^{\text{st}}$ again? |
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May 1 |
answered | Asymptotic Approximation and Sign Convention |
