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Recent Posts
- Tensors 2025/12/10
- Conformal structure – until the puppy grows up 2025/12/07
- Growing Out of the Sandbox 2025/12/02
- Blog reincarnation with analytic idealism 2025/11/30
- Minkowski patches in the Einstein universe 2025/11/27
- Floating in the Einstein Universe 2025/11/24
- Comments on Clifford algebras 2019/01/24
- Comment on “Could ordinary quantum mechanics be just fine for all practical purposes?” by Alexey Nikulov 2018/03/08
- Spinning Top – Space Odity 2017/05/28
- Geodesics of left invariant metrics on matrix Lie groups – Part 2 Conservation laws 2017/05/26
- Geodesics of left invariant metrics on matrix Lie groups – Part 1 2017/05/24
- Killing vectors, geodesics, and Noether’s theorem 2017/05/23
- SL2R as anti de Sitter space cont. 2017/05/15
- Becoming anti de Sitter 2017/05/14
- SL(2,R) Killing vector fields in coordinates 2017/05/11
- Riemannian metrics – left, right and bi-invariant 2017/05/09
- Riemannian metric on SL(2,R)- explicit formula 2017/05/08
- Riemannian metric on SL(2,R) 2017/05/07
- Parametrization of SL(2,R) 2017/05/06
- Curvature of the upper half-plane 2017/05/05
- Geodesics on upper half-plane factory direct 2017/05/04
- Einstein the Stubborn 2017/05/03
- Dedekind tessellation on the Poincaré disk 2017/05/02
- Dedekind tessellation or circles all the way down 2017/04/30
- Real magic – space-time in Lie algebra 2017/04/29
- Geodesics on the upper half-plane – parametrization 2017/04/28
- Geodesics on the upper half-plane – Part 2 circles 2017/04/27
- Geodesics on the upper half-plane – Part 1 Killing vectors 2017/04/26
- Conformally Euclidean geometry of the upper half-plane 2017/04/25
- Esher’s Limit Circle IV rendered on the complex upper half-plane 2017/04/24
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Category Archives: Attitude matrix
Attitude matrix and quaternion path for m>1
I noticed that somehow I did not finish with the case So today, without further ado, I am posting the algorithm. We have the body with and we are considering the case with , where is, as always, the ratio … Continue reading
Without goals everything is a propos of nothing
We are still traveling in the land of 4D butterflies made of remarkable circles such as those introduced in the note Meeting with remarkable circles three days ago. We did not travel too far during these three days, but we … Continue reading
More than one path
On one hand we easily find this kind of an advice: Is it possible to follow more than one path? If you are practising spiritual discipline under the guidance of a Master, it is always advisable to give up your … Continue reading
