# are there any articles(books) where i could learn index free tensor calculus?

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the main point is that it uses direct abstract calculations without refering to a basis or using abstract index language.

https://link.springer.com/article/10.3103/S0025654414040037

for example:

Calculatation of the Einstein-Laub force density for linear dielectrics:

http://community.wolfram.com/groups/-/m/t/1127218

asked Feb 28, 2018

## 2 Answers

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Have a look e.g. at these GR lecture notes by Winitzki and at this discussion on Physics Forums.

answered Aug 18, 2018 by (40 points)
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Among many others but this one is free, more general, clear and complete, including the didactic comparison with the Lorentz-Minkowski formula :

Electromagnetic force distribution inside matter

by Mansuripur, Zakharian & Wright

answered Aug 18, 2018 by (350 points)

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