CHAPTER 4
Introduction to Tensors
Williams Hamilton in 1846 coined the word ‘tensor’. The tensor calculus was, however, developed around 1890 by Gregerio Ricci-Curbastro. But, the subject became well known as tensor analysis, and got broader acceptance with the introduction of Einstein’s General Theory of Relativity around 1915. In the present chapter, we have discussed about the basics of tensor, operations of tensors, Lorentz transformations, Four-vectors, Kronecker delta symbol, Epsilon (Levi Civita) symbol, and examples of Tensors in Physics.
1. Invariance of physical laws as basis for tensors
Physical laws are said to remain invariant under transformations from one inertial reference frame to another. This in general means that the form ...
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