curl: Details

“The curl of the vector field \vec{F}(x,y,z) is the vector field \operatorname{curl}\,\vec{F} \equiv \vec{\nabla}\times\vec{F}=\left( \frac{\partial F_z}{\partial y} - \frac{\partial F_y}{\partial z}, \frac{\partial F_x}{\partial z} - \frac{\partial F_z}{\partial x}, \frac{\partial F_y}{\partial x} - \frac{\partial F_x}{\partial y} \right).”

“The one-piece back is of a medium curl.”

“I curl at my local club every weekend.”