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|    sci.math.symbolic    |    Symbolic algebra discussion    |    10,432 messages    |
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|    Message 9,882 of 10,432    |
|    Peter Luschny to All    |
|    Requesting comments on an integral    |
|    19 Apr 18 04:44:19    |
      From: peter.luschny@gmail.com              Hi all,              I'm much better in finding integrals than in solving them,       therefore I ask here where the experts on this subject seem       to sit in a row like migratory birds in autumn on the       telephone wires.              I have no problem to calculate the value, and indeed it is       utterly trivial to solve this integral by numerical approximation.              But I am interested in everything else which could be said about       this integral and possible transformations of this integral.              Of course integrability in elementary terms is one of these       questions (I think it is not).              The question remains why it is worth dealing with this integral.       This much can be disclosed (so as not to spoil the fun): the       value on the definite interval (-oo..+oo) is the quotient of       two famous constants, which implies a bunch of some interesting       new formulas.              This is the integral in Maple parlance:               int( -log((z^2+1/4)^(1/4))*sech(Pi*z)^2, z = -infinity..infinity)              Thanks,       Peter              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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