Recent content by Sagittarius A-Star

Another possible headline: " Of companies using AI, 74.7% find it possible to replace workers." https://www.ifo.de/en/facts/2026-06-12/first-companies-germany-view-artificial-intelligence-alternative-qualifications

Business survey: Almost 20% of companies in Germany already using artificial intelligence (AI) consider it easy or very easy to replace workers with (technical) degrees. To do that, they would rely on a worker without a degree who is supported by AI. Source...

plus a drift in ##x##-direction

I found an older paper from him: Source: https://arxiv.org/abs/1602.08759 The reference [32] is: Source: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.116.171101

The following video links (at t=26m14s) Gravastars to a (controversial) paper, which was discussed here in PF.

The paper does not describe, how a dark energy vacuum region is created by the collapse. They refer to other papers: sources 11 to 13: https://arxiv.org/abs/2009.12057 https://arxiv.org/abs/2301.01309 https://arxiv.org/abs/2309.14912 source 15: https://arxiv.org/abs/2412.02742

From one of the authors of the paper: Video: Seminar entitled "Three exotic (but not crazy) ideas in classical gravity", given by Luciano Rezzolla (Goethe University Frankfurt, Germany), September 24th, 2025, during the VII Amazonian Symposium on Physics:

The following paper was just published: Source: https://journals.aps.org/prd/abstract/10.1103/c6lw-nx7k preprint archive: https://arxiv.org/abs/2509.15302 via: https://www.uni-frankfurt.de/en/newsroom/meldungen/pressemitteilungen/2026/urknall-im-innern-eines-sterns-wie-ein-gravastern-entsteht

This article confirms, that the force in the restframe of the railgun is mainly a magnetic force. Source: https://en.wikipedia.org/wiki/Railgun#Theory

If you meant the (magnetic) 3D-vector potential ##\vec A##, yes, I think in the lab frame it comes mainly via the magnetic field ##\vec B = \vec \nabla \times \vec A##

They are caused by electromagnetic forces, not by ##A## itself. In 4D-Spacetime Algebra, the electromagnetic field bivector is ##F=\nabla A## Source (equation 6.6): https://davidhestenes.net/geocalc/pdf/SpaceTimeCalc.pdf

This is an interesting link. I think a convincing explanation is the following, because a magnetic field only from the moving part of the circuit does not contribute to Newton's 3rd law: A paper from Peter Graneau from 1987...

Is this the scenario? https://kirkmcd.princeton.edu/examples/hairpin.pdf

Why is there a symmetry?

Source: https://asiatimes.com/2026/04/us-china-space-race-shifts-into-a-higher-lunar-gear/