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Lord Soth

Knight of the Black Rose, image by http://jprart.deviantart.com/

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62
Is there a slowest rate of divergence of a series?
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62
Intuitive proofs that $\lim\limits_{n\to\infty}\left(1+\frac xn\right)^n=e^x$
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21
Derivative of function is bigger??!
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19
What if $\pi$ was an algebraic number? (significance of algebraic numbers)
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16
Proof that any square is of the form $3k$ or $3k+1$
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14
Solutions to $a+b+c=12$, $a, b, c \in \mathbb{N}_0$
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12
Formula for the $1\cdot 2 + 2\cdot 3 + 3\cdot 4+\ldots + n\cdot (n+1)$ sum
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12
pandigital rational approximations to the golden ratio and the base of the natural logarithm
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11
Find the last two digits of $ 7^{81} ?$
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11
Where did this statistics formula come from: $E[X^2] = \mu^2 + \sigma^2$
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11
Find $a\in\mathbb{N}$ such that $n^4+a$ is not prime $\forall n\in\mathbb{N}$
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11
Best way to express 2014
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10
Find the next number in the sequence
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10
Show that the identity matrix $I$ must have norm $1$.
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9
Find the sum : $\sin^{-1}\frac{1}{\sqrt{2}}+\sin^{-1}\frac{\sqrt{2}-1}{\sqrt{6}}+\sin^{-1}\frac{\sqrt{3}-\sqrt{2}}{\sqrt{12}}+\cdots$
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9
Is there a prime number ending with the natural number $n$
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8
Find a real $2\times 2$ matrix $A$ (other than $A = I$ ) such that $A^5 = I $.
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7
How do I solve $\; 3^{2x+1}-10\cdot 3^x+3=0 \quad?$
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7
Finding the limit of roots products $(\sqrt{2}-\sqrt[3]{2})(\sqrt{2}-\sqrt[4]{2})(\sqrt{2}-\sqrt[5]{2})\cdot \cdot \cdot (\sqrt{2}-\sqrt[n]{2})$
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7
Proving $\big(n!^{\frac1n}\big)_{n\in\mathbb N^*} \to \infty$
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6
Ways to fill a $n\times n$ square with $1\times 1$ squares and $1\times 2$ rectangles
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6
Find the determinant by using elementary row operations
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6
Finding squared norm of vector
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6
How can I, as a future mathematician, contribute most to Smart Grid research?
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6
Uses of the incidence matrix of a graph
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6
Evaluate $\lim_{x \to 0} \frac{1-\cos(\sin(4x))}{\sin^2(\sin(3x))}$ without L'Hospital
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6
Evaluating $\int_{\pi/3}^{\pi/2}\frac{1}{\sin\left(x\right)-\cos\left(x\right)+1} \operatorname dx$
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6
Proving that $-\frac{\cos x +\cos^2 x + \sin^2 x}{(1 + \cos x)^2} = -\frac{1}{1 + \cos x}$
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6
Can anyone give me x,y coordinates for an octagon?
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5
Analytical approximation of an integral
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