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1d
revised Why $-1 \leq\frac{\langle A,B\rangle}{||A||\, ||B||}\leq1$?
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1d
answered Why $-1 \leq\frac{\langle A,B\rangle}{||A||\, ||B||}\leq1$?
Apr
6
revised Evaluate the following integral. (double integral)
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Mar
27
awarded  Inquisitive
Mar
18
revised Calculating a bivariate integral across a circle with its origin @ (1,1)
added 109 characters in body
Mar
18
comment Writing 1+1= 2 in a complicated way
I don't understand what he (or you) is trying to do here? All you are doing is re-expressing one set of expressions in an equivalent form using more symbols?
Mar
15
comment Compute $\int_{0}^{e}\sin(\pi\ln(x))dx$
@ChristophS No problem, glad I could help!
Mar
15
revised Compute $\int_{0}^{e}\sin(\pi\ln(x))dx$
deleted 7 characters in body
Mar
15
answered Compute $\int_{0}^{e}\sin(\pi\ln(x))dx$
Mar
6
comment $n$th derivative of $\frac 1{f(x)}$
@Laertes Aside from perhaps a recurrence relationship, I think this is the best you can hope for I'm afraid!
Mar
6
comment Solve Laplace's equation inside a semi-infinite strip
@JessyWhite Sorry, I missed out the minus sign! The minus sign is important as it means the solution decays as we approach infinity. This is the significance of the half-infinite $x$-dimension
Mar
6
revised Solve Laplace's equation inside a semi-infinite strip
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Mar
6
answered Solve Laplace's equation inside a semi-infinite strip
Mar
1
reviewed Leave Open How do I interpret this density function
Feb
17
comment 2-Dimensional FOURIER TRANSFORM
Your $y$ variable appears in both $g(x,y)$ and $G(w,y)$? Is that right?
Feb
3
comment In how many ways can we distribute 6 identical pears?
@Rick No problem; glad it helped!
Feb
3
comment In how many ways can we distribute 6 identical pears?
@Rick I am using the second form, with $n=3$, $k=6$; as we are using Theorem 1 on the Wikipedia page, as we want positive numbers of items in each bin, rather than non-negative (which include zero).
Feb
3
comment What is the limit of this complex expression?
I am unfamiliar with complex analysis, but what you have done seems correct to me; but the $j$ is a prefactor which can be pulled out of the limit, and we have $jx = 0 \iff x = 0$ and thus what they are trying to find will be equivalent.
Feb
3
comment In how many ways can we distribute 6 identical pears?
@HenningMakholm There are $6$ pears, and so we have $5$ places in which we can place the dividers, and we wish to place $2$ dividers in order to create three separate multisets, thus giving us $\binom{5}{2}$
Feb
3
answered In how many ways can we distribute 6 identical pears?