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3 days ago · The kernel of the Hamiltonian constraint. The kernel is the space of states which the Hamiltonian constraint annihilates. One can outline an explicit construction of the complete and rigorous kernel of the proposed operator. They are the first with non-zero volume and which do not need non-zero cosmological constant.
1 day ago · 1962 – Richard Arnowitt, Stanley Deser, and Charles W. Misner introduce the ADM reformulation and global hyperbolicity, 1962 – Istvan Ozsvath and Englbert Schücking rediscover the circularly polarized monochromomatic gravitational wave. 1962 – Hans Adolph Buchdahl discovers Buchdahl's theorem. 1962 – Hermann Bondi introduces Bondi mass.
2 days ago · “The power of gravity is writ large across our visible universe. It can be seen in the lock step of moons as they circle planets; in wandering comets pulled off-course by massive stars; and in the swirl of gigantic galaxies …
4 days ago · general relativity. gravitational wave. wave. Kip Thorne (born June 1, 1940, Logan, Utah) is an American physicist who was awarded the 2017 Nobel Prize for Physics for his work on the Laser Interferometer Gravitational-Wave Observatory (LIGO) and the first direct detection of gravity waves.
19 hours ago · Example of an Alcubierre warp trajectory, from “Constant Velocity Physical Warp Drive Solution”. (2024) It’s been 30 years since a Mexican theoretical physicist said that a warp drive was possible: hypothetically.
2 days ago · 1. Charles M. Schwab Mansion. Photo from Library of Congress. Charles W. Schwab was president of U.S. Steel (founded by Andrew Carnegie) and also founded Bethlehem Steel Company. On...
2 days ago · Charlemagne [b] ( / ˈʃɑːrləmeɪn, ˌʃɑːrləˈmeɪn / SHAR-lə-mayn, -MAYN; 2 April 748 [a] – 28 January 814) was King of the Franks from 768, King of the Lombards from 774, and Emperor of what is now known as the Carolingian Empire from 800, holding all these titles until his death in 814.
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