Index Symbols | A | C | D | E | I | N | O | P | S | U | V Symbols $i$-th component $i$-th entry A angle C Cartesian equation, [1] Cauchy-Schwarz inequality column vector components cross product D determinant directional vector, [1], [2] distance dot product E entries I inner product N norm normal equation, [1] normal vector, [1] O orthogonal orthogonal projection of a vector $\mathbf{w}$ onto the nonzero vector $\mathbf{v}$ P parametric vector equation, [1], [2] S scalar multiple scalars size sum U unit vector unit vector in the direction of $\mathbf{v}$ V vector
