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seen Jul 17 at 8:54

Jul
17
awarded  Popular Question
Jul
15
answered Geometric series of matrices
Jul
2
awarded  Curious
May
20
comment Finding the correct distribution model
The OP only wanted a hint...
May
20
comment Finding the correct distribution model
No. Try to replace $a$ with -3 to see why: $$\left(e^y\right)^3=e^y e^y e^y=e^{3y}$$
May
20
comment Finding the correct distribution model
Note that it should read $$(1-e^{-ay})$$ and not $$(1-e^{y^{-a}})$$ as you wrote
Mar
15
comment Distance to an affine hyperplane
"Show that there exists $x\in E$ such that $||x||=1$ and $d(y,H)\ge1$". What is $y$?
Mar
12
awarded  Popular Question
Mar
1
answered The boundary value of gradient of solution
Feb
12
answered Does a line integral depend continiously on the curve?
Feb
11
answered Given position vector of points A, B, find the equation of perpendicular bisector of AB in a vector form.
Feb
11
comment Difference between i and -i
In other words, you are asking whether conjugation is an automorphism of $\mathbb{C}$. The answer is yes.
Feb
11
comment Why does linear dependence require a *finite* linear combination to vanish?
math.stackexchange.com/questions/165684/…
Feb
11
comment Does a line integral depend continiously on the curve?
If you choose arc-length parametrization of the curves, I think their derivatives must converge uniformly too. Since the integral is independent of parametrization, you're done.
Dec
15
awarded  Yearling
Oct
18
comment general solution for a 4th order PDE
I don't know what you mean. Do you have the initial conditions, i.e. $W(x,t=0)?$
Oct
18
comment Does this series converge? Can I use a rearrangemt to prove it doesn't?
@EpicGuy Indeed
Oct
18
comment Does this series converge? Can I use a rearrangemt to prove it doesn't?
$$\begin{align} \frac{2}{3}-\frac{1}{3}&=\frac{1}{3}\\ \frac{2}{4}-\frac{1}{4}&=\frac{1}{4}\\ \frac{2}{5}-\frac{1}{5}&=\frac{1}{5}\\ \end{align}$$
Oct
18
comment general solution for a 4th order PDE
Why would you drop the cross derivative term $d^2w/dxdt$?
Oct
16
answered general solution for a 4th order PDE