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seen Feb 11 '12 at 19:09

Jul
2
awarded  Curious
Jan
18
revised How would I simplify this?
deleted 492 characters in body
Jan
18
accepted How would I simplify this?
Jan
18
comment How would I simplify this?
Thanks for your help, yeah Im doing quite a long question so I just wanted to make sure I did it correctly before proceeding.
Jan
18
asked How would I simplify this?
Jan
16
revised How do I differentiate this?
deleted 173 characters in body
Jan
16
comment How do I differentiate this?
Thanks, Im sorry but im really stuck on this question. How would I find $\partial^2_x,\partial_x\partial_y,\partial_y\partial_x,\partial_y^2$ etc.? As in, what do I differentiate when I am trying to find $\partial_x^2$?
Jan
16
comment How do I differentiate this?
Thanks, but what would the $f$ be? $\frac{x+y}{\sqrt 2}$?
Jan
16
comment How do I differentiate this?
Thanks, I understood what you did, but for $\partial^2u=\frac 12(\partial^2_x+\partial_x\partial y+\partial_y\partial_x+\partial_y^2)$, what exactly do I differentiate? What would $\partial^2_x$ be for example?
Jan
16
comment How do I differentiate this?
Thanks, Im just wondering, how did you get $x=(u+v)\sqrt{2}$ and $y=(u-v)\sqrt{2}$?
Jan
16
comment How do I differentiate this?
haha no problem, its ok.
Jan
16
comment How do I differentiate this?
@Emmad: It doesnt state anything in the problem, although you can take a look at the original question below (note the $v$ changes to $w$ in the original question). math.stackexchange.com/questions/99608/…
Jan
16
comment How do I differentiate this?
Thanks, so is the answer for both, $0$?
Jan
16
asked How do I differentiate this?
Jan
16
comment Change of variables of PDE
thanks, now i see it! I think you just made a typo though, its $x = \frac{u + w}{\sqrt{2}}$.
Jan
16
asked Change of variables of PDE
Dec
10
accepted Inequality question (with complex numbers)
Dec
10
accepted Contour integration help: $\int_{\gamma}e^zdz$ with $\gamma(\theta)$=$e^{i\theta}$
Dec
10
accepted Estimation lemma question
Dec
2
revised Estimation lemma question
deleted 147 characters in body