Occurrence of current layers when a magnetic field is deformed in a perfectly conducting medium

摘要: The formation of magnetic-field discontinuities (current layers) is treated in the quasisteady evolution an originally continuous irrotational magnetic field frozen into a low-density hot plasma. This problem interest for theory heating solar corona and explanation mechanism flare processes atmosphere sun. A simplified model used to show that topology (the presence separatrix lines or surfaces it) has crucial role appearance such singularities. 17 refs., 10 figs.