Here's the code:
sigma = 0.2
gauss(x) = exp(-(x)2/(2*sigma2))
gauss1 = gauss(x).derivative
gauss2 = gauss1(x).derivative
ngauss2(x) = -1*gauss2(x)
sngauss2(x,y) = ngauss2(sqrt(x2 + y2))
a1 = var('a1'); a2 = var('a2'); b1 = var('b1'); b2 = var('b2')
chunkx = integral(sngauss2, x, a1, b1)
chunky = integral(chunkx, y, a2, b2)
chunky.show()
When evaluated it says "It looks like jsMath failed to set up properly
(error code -7). I will try to keep going, but it could get ugly."
Calling "print chunky" prints something weird.
All i want to do is to get symbolic formula for an integral of part of
a surface, described by sngauss2, so i can use it outside of Sage.
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