Geodesic
On the Problem of Energy Concentration
Informatics and Automation, Modern Methods of Mechanics, Tome 322 (2023), pp. 83-93

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We discuss the well-known problem of energy concentration, which is the inverse of the strong explosion or the expanding piston problem. Using a number of physical examples, we show that under certain conditions and with certain forces involved in the focusing process, one can achieve the concentration of any amount of energy. First of all, this applies to the gravity force and its manifestation in problems of relativity theory with viscosity and heat conduction taken into account.
Keywords: energy concentration, collapse, theory of relativity, viscous heat-conducting gas. 
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     author = {A. N. Golubyatnikov and D. V. Ukrainskii},
     title = {On the {Problem} of {Energy} {Concentration}},
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A. N. Golubyatnikov; D. V. Ukrainskii. On the Problem of Energy Concentration. Informatics and Automation, Modern Methods of Mechanics, Tome 322 (2023), pp. 83-93. http://geodesic.mathdoc.fr/item/TRSPY_2023_322_a6/