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BesselK interpretation in Wolfram Alpha?

Martin H.
Posted 4 years ago

Hi!

So I've gotten the expression above in an answer from Wolfram|Alpha. I don't know how to interpret the meaning of the superscript. For example "BesselK(3,4)" would mean the modified Bessel function of the second kind, of order 3, evaluated at 4. So what does the superscript means? some sort of derivative? Why are there two values in the superscript?

The output comes from the following query, if that helps:

integral log(x)*2/xexp(-7x - 5/x) from 0 to inf

First post here. Please let me know if I've posted this question in the wrong place.
POSTED BY: Martin H.
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Bill Nelson
Bill Nelson
Posted 4 years ago
POSTED BY: Bill Nelson
Martin H.
Martin H.
Posted 4 years ago

Hi Bill, thanks for the reply!

Ok, then I understand the superscript notation. second derivative w.r.t. the order in this case I guess.

I see now that I included the wrong query in my original question. It is when the logarithm is raised to the power of two that the second derivative shows up.

integral log(x)2*1/x exp(-7x -5/x) from 0 to inf
POSTED BY: Martin H.
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