Tensor has different meanings in different fields of science and engineering. Alot of people are lazy and call tensor fields tensors. As you know math enables us to understand the physical universe. This is a branch of alegbra used to understand things more easily. Its used in math generally to extend understanding of arrays of data to understand physical terms. Einstein used in realitivity and you need alot of time to spend on algebra.
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A vector is a group of numbers in one dimensions; if you have such arrangements of numbers in more than one dimension, you get a tensor. Actually, a vector is simply a special case of a tensor (a 1st-order tensor).
A scalar, which is a tensor of rank 0, is just a number, e.g. 6 A vector, which is a tensor of rank 1, is a group of scalars, e.g. [1, 6, 3] A matrix, which is a tensor of rank 2, is a group of vectors, e.g. 1 6 3 9 4 2 0 1 3 A tensor of rank 3 would be a group of matrix and would look like a 3d matrix. A tensor is the general term for all of these, and the generalization into high dimensions.
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Yes, used them in the past.Yes, used them in the past.Yes, used them in the past.Yes, used them in the past.
it was used when it was used haha