* Compute the vector product of two 3d vectors. * @f[\begin{align*} * \vec{a}\times\vec{b} &= \begin{vmatrix} * \hat{i} & \hat{j} & \hat{k}\\ * a_x & a_y & a_z\\ * b_x & b_y & b_z * \end{vmatrix}\\ * &= \left(a_yb_z-b_ya_z\right)\hat{i} - \left(a_xb_z-b_xa_z\right)\hat{j} * + \left(a_xb_y-b_xa_y\right)\hat{k} \end{align*} * @f] * @param[in] a first vector @f$\vec{a}@f$ * @param[in]
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