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Mar
20
comment How many skew symmetric matrices are possible?
@Sabyasachi $A^T = -A$ (as opposed to "just" symmetric, which is $A^T = A$)
Mar
20
answered How many skew symmetric matrices are possible?
Mar
20
comment Find out when a function has completed one revolution about the origin
You could try projecting the position of the body onto the $xy$-plane, say, and then find the angle of the projection to the origin in the $xy$-plane. Then you could run a root finder (something like Bisection Algorithm) looking for the first value of $f$ above your starting angle.
Mar
20
answered Median $\neq$ Expectation
Mar
20
answered sum up to nth term with fraction in the power
Mar
20
answered Help with integral with $\arcsin x$.
Mar
20
revised Help with integral with $\arcsin x$.
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Mar
20
revised Using the polar form of $1 + i$ and $\sqrt3 + i$ to deduce $\cos (\frac{\pi}{12}), \sin(\frac{\pi}{12})$
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Mar
20
comment Functional Analysis, $L^p$ spaces
@ChaoukiBenSaid You don't need to compute the integral, just prove that it converges. I would try the substituion $u=x^{1-\alpha p}$ which should transform this to a more familiar $\int \left(1+u^c\right)^{-p} du$, where $c = \frac{\beta-\alpha}{1-\alpha p}$ (plus you have to analyze the case $\alpha p = 1$ separately.
Mar
19
revised Diagonal of a matrix in different basis
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Mar
19
answered Solve a product of binomials raised to a power for x
Mar
19
comment Is $L=\{w\mid \text{ same number of 010 and 101}\}$ regular?
@ThomasAndrews Thanks for the clever edit, I learned of $\mid$. thank you
Mar
19
revised Is $L=\{w\mid \text{ same number of 010 and 101}\}$ regular?
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Mar
19
answered Prove Inverse Function
Mar
19
comment center mass of the solid
Typically, $$ \text{mass} = \iiint_\Omega \rho(x,y,z) dV, $$ where $\Omega$ denotes your region. Please provide some thoughts on the problem. We will be glad to furnish more hints.
Mar
19
revised center mass of the solid
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Mar
19
comment How to calculate volume of a solid under a given surface with double intergrals?
Hi, welcome to Math.SE! Please provide some work on the problem. I gave you a hint (see answer below) to give an idea how to approach a problem of that type. Want to try it and let me know if you have any further questions? If yes, please post them as comments to the answer...
Mar
19
revised How to calculate volume of a solid under a given surface with double intergrals?
edited tags
Mar
19
answered How to calculate volume of a solid under a given surface with double intergrals?
Mar
19
answered greatest common divisor of two primes a,b