Solución
∬
S
(
∇
×
F
)
⋅
n
d
S
=
2
π
\iint_S (\nabla\times\bold{F})\cdot\bold{n}dS = 2\pi
∬
S
(
∇
×
F
)
⋅
n
d
S
=
2
π