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Jun
25
awarded  Notable Question
May
16
comment Evaluating $\sum_{n=0}^{\infty}\frac{J_n(n)}{n!}$
Unfortunately, I don't see how this leads to the evaluation of a closed form.
May
16
revised Evaluating $\sum_{n=0}^{\infty}\frac{J_n(n)}{n!}$
added 2 characters in body
Apr
6
awarded  Famous Question
Mar
11
comment Similar function to Sinc function?
@Sebastian Do you have a particular application for this required function in mind?
Mar
11
comment Similar function to Sinc function?
@Sebastian That's true. I think the difference is that while the spherical Bessel functions can be expressed in terms of elementary functions, the regular Bessel functions can only be expressed as power series/integral, etc.
Mar
11
comment Similar function to Sinc function?
The Bessel function of the first kind of order 0, $J_0(x)$ has this property.
Mar
11
comment How to Evaluate $\int\frac1{x \ln x+ 7 \ln x} \,\mathrm dx$
An elementary antiderivative for this function doesn't seem to exist.
Mar
11
asked Analytic solution to wave equation on a hollow cylinder
Feb
27
awarded  Yearling
Jan
15
comment Algorithm for finding “fact families”
@MarioCarneiro Ok, I understand what you mean.
Jan
15
comment Algorithm for finding “fact families”
@MarioCarneiro if a better algorithm cannot be found it might also be an interesting problem to see if a bound on the number of sets with exactly k digits under n could be determined
Jan
15
comment Algorithm for finding “fact families”
@MarioCarneiro Well, I'm assuming that it's not possible to store the sets. In terms of computationl efficiency, as the algorithm is brute force, I'm also assuming that while we don't know the specific O of this there is probably no worse algorithm for generating the sets other than say the random "bogo sort" approach
Jan
15
comment Algorithm for finding “fact families”
@Joffan She told me after she consulted with the child's teacher that families including "1" as a factor should be excluded; originally the program included them. I do not understand why. Nobody else seems to be able to agree either: blurtit.com/2259050/…
Jan
15
revised Algorithm for finding “fact families”
deleted 2 characters in body
Jan
15
asked Algorithm for finding “fact families”
Oct
18
awarded  Notable Question
Sep
24
awarded  Autobiographer
Sep
5
awarded  Popular Question
Aug
28
comment Very difficult sum of series
@lincolo Wolfram Alpha seems to be able to evaluate it in closed form, so..m.wolframalpha.com/input/…