176 reputation
4
bio website
location
age
visits member for 1 year, 6 months
seen Mar 6 at 16:54

Theoretical physicist turned programmer.


Jan
23
comment implicit derivates incorperating laplace's equation
@Jarryd Yes, at that stage, you now use the fact that $f(x,y)$ is itself harmonic. This means $f^{(0,2)}(A,B)+f^{(2,0)}(A,B)=0$ for any $A$ and $B$. Therefore $F(x,y)$ is harmonic.
Jan
23
comment What is the difference between a point and a vector
Well, my answer is not very precise or technical, so I could see how some people wouldn't like it. On the other hand, from the way the question was posed, I was intuiting that the OP is probably in the middle of undergrad, perhaps not even a math major, so I thought my answer would be more useful then some of the very detailed, technical responses that I saw. Anyway, I appreciate the support.
Jan
22
comment Interchanging a limit and integral
Note that the bottom example doesn't really make any sense. The definite integral doesn't depend on $x$ at all (since $x$ is the variable of integration) so taking its limit as $x\to\infty$ is pointless.
Jan
22
comment implicit derivates incorperating laplace's equation
You're welcome. If you found this useful, could you please accept it as an answer?
Jan
22
comment Help with Adventures in Stochastic Processes
You'll have better luck soliciting useful responses if you just copy down the statement and any explanatory text here in the body of your question. I couldn't even see the text when I followed your link.
Jan
22
answered Solving the differential equation: $ x = 11 (y')^{10} \cdot y'' $
Jan
22
answered Probability of having a complete random graph
Jan
22
answered Complex numbers and Roots of unity
Jan
22
revised Find the value of $\delta> 0$ for….
cleaned up the notation and formatting
Jan
22
suggested suggested edit on Find the value of $\delta> 0$ for….
Jan
22
awarded  Commentator
Jan
22
awarded  Editor
Jan
22
revised implicit derivates incorperating laplace's equation
added 273 characters in body
Jan
22
answered implicit derivates incorperating laplace's equation
Jan
21
comment How do I convince my students that the choice of variable of integration is irrelevant?
I've never heard the phrase "first class member" but I think I know what a function is.
Jan
21
comment why does commutativity of addition fail for infinite sums?
+1 for "Why would it?"
Jan
21
comment What is the difference between a point and a vector
@Squirtle Thanks. I actually don't mind getting downvoted if I get some constructive criticism along with it.
Jan
21
answered Why do these two solids of revolution have different volumes?
Jan
21
answered why does commutativity of addition fail for infinite sums?
Jan
21
comment What is the difference between a point and a vector
It would be nice if the downvoter could tell me what was wrong with this answer.