Definition
Normal Vector
Let
be an inner product space. A vector is a normal vector to a set at a point if it is orthogonal (perpendicular) to the tangent space of at .
Orthogonality Condition
For every vector
Normal Vector
Let
be an inner product space. A vector is a normal vector to a set at a point if it is orthogonal (perpendicular) to the tangent space of at .
For every vector