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 Apr6 awarded Famous Question Mar11 comment Similar function to Sinc function? @Sebastian Do you have a particular application for this required function in mind? Mar11 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. Mar11 comment Similar function to Sinc function? The Bessel function of the first kind of order 0, $J_0(x)$ has this property. Mar11 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. Mar11 asked Analytic solution to wave equation on a hollow cylinder Feb27 awarded Yearling Jan15 comment Algorithm for finding “fact families” @MarioCarneiro Ok, I understand what you mean. Jan15 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 Jan15 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 Jan15 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/… Jan15 revised Algorithm for finding “fact families” deleted 2 characters in body Jan15 asked Algorithm for finding “fact families” Oct18 awarded Notable Question Sep24 awarded Autobiographer Sep5 awarded Popular Question Aug28 comment Very difficult sum of series @lincolo Wolfram Alpha seems to be able to evaluate it in closed form, so..m.wolframalpha.com/input/… Aug28 comment What is the Laplace Transform for the next equation? @MSci Arturo Ortiz If the original equation is correct as it stands now, I don't think the answer is correct. The Laplace transform of a derivative should involve initial conditions somewhere. Aug28 awarded Organizer Aug28 revised What is the Laplace Transform for the next equation? changed tag from Laplace equation to Laplace transform