# Opinions on Tangential and normal components

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In mathematics, given a vector at a point on a curve, that vector can be decomposed uniquely as a sum of two vectors, one tangent to the curve, called the tangential component of the vector, and another one perpendicular to the curve, called the normal component of the vector. Similarly a vector at a point on a surface can be broken down the same way.

More generally, given a submanifold N of a manifold M, and a vector in the tangent space to M at a point of N, it can be decomposed into the component tangent to N and the component normal to N.

In the image below, you can see a graph with the evolution of the times that people look for Tangential and normal components. And below it, you can see how many pieces of news have been created about Tangential and normal components in the last years.
Thanks to this graph, we can see the interest Tangential and normal components has and the evolution of its popularity.