I. 12.11 Vector Field Circulation

Condition: Check the Stake formula for the vector field \ (\ vec {a} = (y-z) \ vec {\ iMath}+(z-x) \ vec {\ jmath}+(x-y) \ vec {k} \), taking the circle \ ( x^{2}+y^{2} = a^{2}, z = 0, \ quad \) and for the surface of integration - any surface passing through this circle.