A tensor is a generalization of a such a vector to an object with more than one suffix with the requirement that these components mix among themselves under rotation by each individual suffix followin...A tensor is a generalization of a such a vector to an object with more than one suffix with the requirement that these components mix among themselves under rotation by each individual suffix following the vector rule. The number of suffixes is the rank of the Cartesian tensor, a rank n tensor has of course 3n components. Tensors are common in physics: they are essential in describing stress, distortion and flow in solids and liquids.
