740 reputation
310
bio website stanford.edu/~vkl
location California
age 29
visits member for 3 years, 11 months
seen yesterday

PhD in EE (optics/physics/computational stuff). I mostly answer questions related to math, geometry, and numerics here.


Jul
2
awarded  Curious
Jun
27
revised Geometry - How do I find this angle in terms of length/radius
Added explanation for details on three circle case
Jun
27
answered Geometry - How do I find this angle in terms of length/radius
Jun
10
revised Simplifying a Fourier integral
Rewrote to simpler (corrected) form and added alternative forms.
Jun
10
comment Circle areas on squared grid
There isn't going to be some simple universal formula, and to further require it in SQL will be horrendous. Maybe if you know the 9 numbers are always consistent with an actual solution, there might be a simple(r) answer. The problem is also ill-posed since there generally won't (numerically) be a unique solution.
Jun
10
revised Orientation of rectangle on conic section
Added proof of existence of center of symmetry
Jun
10
answered Orientation of rectangle on conic section
Apr
30
answered How to calculate this shape's volume
Apr
29
answered Slicing up geometry to create triangles
Apr
29
comment Linear Algebra quesion
There are certainly sets of parameter values for which the equation produces no solution or infinitely many. Do you want just any solution if one exists?
Apr
23
revised Proof that laplace's equation is rotationally invariant using chain rule
Cleaned up the math notation
Apr
23
suggested suggested edit on Proof that laplace's equation is rotationally invariant using chain rule
Apr
23
comment What is the Fourier series of $e^{\mu\cos\theta}$?
There's the obvious $2m I_m(x) = x[I_{m-1}(x) - I_{m+1}(x)]$ which lets you raise and lower the order.
Apr
23
comment What is the Fourier series of $e^{\mu\cos\theta}$?
It seems that if you FullSimplify $k_4-I_4(\mu)$, you get $0$ at least, so the pattern appears to hold.
Apr
23
answered What is wrong with this algorithm
Apr
23
comment Find the value of $(a+b+c)$ when $\cos\theta+\cos^2\theta+\cos^3\theta=1$ and $\sin^6\theta=a+b\sin^2\theta+c\sin^4\theta$
You need to define your variables or include a picture.
Apr
23
awarded  Yearling
Apr
22
comment Algebraic question
Yes, that is the answer.
Apr
22
answered Algebraic question
Apr
22
comment how this computes the eigenvalues?
Look up the Wikipedia page on the power iteration.