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  • 7 votes cast
Apr
26
answered Show that any conjugate pair of complex numbers (with non-zero imaginary part) cannot be the spectrum of any 2x2 matrix with real, nonnegative entries
Apr
26
answered Avoid exponential growth when scaling
Apr
26
asked Approximating the integral of a large product
Sep
17
comment Central limit theorem for positive random variables
Indeed, the article seems more like "I found something fun" than a proper paper. Nevertheless, I agree with their intuitive arguments.
Sep
17
comment Central limit theorem for positive random variables
Apologies, I forgot to include the factor of $n$. That's fixed.
Sep
17
revised Central limit theorem for positive random variables
Corrected missing $n$ factor for variance.
Sep
17
asked Central limit theorem for positive random variables
May
25
comment Mixture of binomial distributions
Yes, the notation could be more rigorous. As you mentioned in your third comment, I seek the marginal distribution of $K$. I assume that $a$ is sufficiently small for the Poisson distribution to be a good approximation irrespective of $x$. Unfortunately, the approximation does not help with the integral.
May
25
asked Mixture of binomial distributions
Feb
25
comment Normal approximation to the log-normal distribution
@RobertIsrael, do you have a reference for your answer above? Citing stackexchange is probably a bit tricky.
Sep
23
awarded  Popular Question
Aug
18
asked Equivalent to proportionality sign for additive constants
Mar
28
comment What is the maximum volume of a cylinder that can fit in a sphere of a constant radius?
Thanks for the catch. That is now fixed.
Mar
28
revised What is the maximum volume of a cylinder that can fit in a sphere of a constant radius?
Correction motivated by comment.
Feb
10
awarded  Commentator
Feb
10
comment Repeated convolution of probability distributions
I have had a bit of a read and found some interesting distributions. For the sake of computational simplicity, I am interested in distributions with simple PDFs, CDFs and inverse CDFs. The Levy distribution seems a great candidate but has a non-finite moment. Any suggestions for a distribution with analytic PDF, CDF, inverse CDF and finite first moment?
Feb
10
answered Given $n$-linearly independent vectors how do I find a vector not orthogonal to any of them?
Feb
10
comment Repeated convolution of probability distributions
Thanks for the hint. I found this book, which discusses the topic in more detail: amazon.com/…
Feb
10
accepted Repeated convolution of probability distributions
Feb
10
awarded  Student