2003/04/25 by Michael A. Ivanov, Ivanov, Michael A.
Earth and Planetary Sciences · Mathematics · Physics and Astronomy · #FOS: Physical sciences #Geophysics and Gravity Measurements #Mathematical Physics (math-ph) #Relativity and Gravitational Theory #math-ph #math.MP
paper · pdf · doi:10.48550/arxiv.math-ph/0304036
Contribution to the 5th Conference 'Symmetry In Nonlinear Mathematical Physics' which will be held in June 23-29, 2003, Kyiv, Ukraine
arxiv created 2003/04/25 · openalex publication_date 2003/04/25 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Two examples, not connected at present, from author's papers (Nuovo Cim., 1992, v.105A, p.77 [hep-th/0207210] and GRG, 1999, v.31, p.1431 [gr-qc/0207017]) are considered here in which a physical model has discrete symmetries and additional non-observable coordinates or parameters. Then it is possible to introduce some apparent continuous symmetries of the model for an observer which cannot know values of these additional quantities.