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At the moment, Sage uses Maxima to compute the Bessel Y function. This is slow and works only with the default 53 bits of precision. It would be fairly easy to implement this:
* for integer value…
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Currently we have
```
sage: bessel_K(10 * I, 10)
---------------------------------------------------------------------------
TypeError Traceback (most recent call la…
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Consider the following:
```
sage: f(x) = x; f
x |--> x
sage: integral(f, x)
x |--> 1/2*x^2
sage: integral(f, x, 0, 1)
x |--> 1/2
```
The last integral has not "happened" to be constant - it does no…