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Sharkos

UK

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It's me: a webpage. I also have a website which I should really write some content for.

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48
Integrating $\int^{\infty}_0 e^{-x^2}\,dx$ using Feynman's parametrization trick
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45
Notation: Why write the differential first?
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29
What is a simple example of a limit in the real world?
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27
Why does Group Theory not come in here?
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25
A matrix satisfying $AB-BA=B$
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23
Evaluation of Gaussian integral $\int_{0}^{\infty} \mathrm{e}^{-x^2} dx$
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22
Level of Rigor in Mathematical Physics
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20
Divergent Series Intuition
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19
Understanding the differential $dx$ when doing $u$-substitution
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18
How to prove $(a-b)^3 + (b-c)^3 + (c-a)^3 -3(a-b)(b-c)(c-a) = 0$ without calculations
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17
Quantum Mathematics?
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17
How to show that $\sum_{n=1}^{\infty} \frac{1}{(2n+1)(2n+2)(2n+3)}=\ln(2)-1/2$?
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16
What are the important theorems in the theory of dynamical systems?
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16
Evaluating $\int_0^{\infty}\frac{\ln(x^2+1)}{x^2+1}dx$
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15
If the sum $\frac{1}{7} + \frac{1\cdot 3}{7\cdot 9} + \frac{1\cdot 3\cdot 5}{7\cdot 9\cdot 11} + ...$ to 20 terms is $\frac{m}{n}$, then $n-4m$?
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14
why is the laplacian of 1/r equal zero outside the origin?
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14
If a vector $v$ is an eigenvector of both matrices $A$ and $B$, is $v$ necessarily an eigenvector of $AB$?
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14
What is the main use of Lie brackets in the Lie algebra of a Lie group?
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13
Why is the fundamental group of the projective plane $C_{2}$?
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11
a problem on Polya's urn scheme
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10
Curl of gradient is not zero
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10
An inflection point where the second derivative doesn't exist?
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10
Prove that there isn't a polynomial with $\text {f(x)}^{13} = {(x-1)}^{143}+(x+1)^{2002}$
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9
A simple but weird functional equation
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9
Are locally compact Hausdorff spaces with the homeomorphic one-point compactification necessarily homeomorphic themselves?
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9
Why do we use open intervals in most proofs and definitions?
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9
Does there exist a matrix $\mathbf{A}\in\mathbb{R}^{3\times3}$ such that $\mathbf{A}^{2}=-\mathbf{I}$?
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9
why measure theory for probability?
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9
What is a proof?
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8
On an identity between fractions, related to a determinant by K. Rohn
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