Category Archives: Lorentz transforations

Densities

Posted on 2025/12/21 by arkajad

This post introduces “densities”. There is a very nice book, available on arxiv, by Sean M. Carroll: “Lecture Notes on General Relativity“. There, on p. 52, Carroll writes “… we don’t like tensor densities, we like tensors.” Well, I do … Continue reading →

Posted in AI, Geometry, Lorentz transforations, Spin and rotations, Uncategorized | Tagged , , , , , , | 56 Comments

When China Rules the World

Posted on 2017/02/27 by arkajad

The title of the post can be found on Wikipedia with additional information. But this post is more personal. Indeed China rulez! Few weeks ago I received the following email: Quantum World-2017 Time: 16th-18th October, 2017 Place: Changsha, Hunan Province, … Continue reading →

Posted in General, Lorentz transforations, Special relativity, Spin and rotations, Spin matrices | 1 Comment

Elliptic m-deformed relativity

Posted on 2017/01/30 by arkajad

According to Wikipedia special relativity theory was originally proposed in 1905 by Albert Einstein. But Wikipedia is not always the best source of information. For instance Wikipedia has a section about “Causality and prohibition of motion faster than light“. Quite … Continue reading →

Posted in Elliptic functions, Lorentz transforations, Special relativity, Unconventional science | 13 Comments