Einstein Relatively Easy


I have recently replied to a comment posted by Ingeniero concerning the relation between contravariant/covariant vector components and basis vectors transformation matrix.

Hope it makes things clearer.

See the comment



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It will be a place where i will give an update of any new article, any interesing reading  or more generally of any interesting news about Relativity.

Four months after having been lauched, the stats show an increasing interest for einsteinrelatively.com. I am hoping such a growing trend for the next following months also!


We are happy to announce the start of the article series dedicated to General Relativity.

You can already read the Introduction to General Relativity

From now on, we will be writing articles related to both Special and General Relativity theories in parallel.




"The essence of my theory is precisely that no independent properties are attributed to space on its own. It can be put jokingly this way. If I allow all things to vanish from the world, then following Newton, the Galilean inertial space remains; following my interpretation, however, nothing remains.."
Letter from A.Einstein to Karl Schwarzschild - Berlin, 9 January 1916

"Quantum mechanics is certainly imposing. But an inner voice tells me that it is not yet the real thing. The theory says a lot, but does not really bring us any closer to the secret of the 'old one'. I, at any rate, am convinced that He is not playing at dice."
Einstein to Max Born, letter 52, 4th december 1926

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