c is a curve of the cutting of the to surfaces:(adsbygoogle = window.adsbygoogle || []).push({});

x^2+y^2=1

z=xy

at the point (1,0,0) the tangent to C is toward j^

so what is

S(xz^2-y)dx+(3x-yz^2)dy+(zx^2-zy^2)dz

C

?

hmm..

i calculated this vectorian field rotor: it's (0,0,4)

i know i should use stocks and make it

SS(0,0,4)*n^ ds

but how can i build a surface (so i could know the integration borders and what is the normal)?

thanks

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# Stock's theorem?

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