This is strange:
x, y =var('x y')
plot3d(sqrt(x^2+y^2)*sin(1/sqrt(x^2+y^2)), (x,-1/2, 1/2), (y, -1/2, 1/2),
adaptive=True)fails with "ValueError: cannot convert float NaN to integer". Something goes wrong when it partitions up the domain, probably when it looks at the origin. Is there a way to avoid this? Is this a bug? Thanks, Dan -- --- Dan Drake ----- http://mathsci.kaist.ac.kr/~drake -------
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