479 research outputs found
On pleated singular points of first order implicit differential equations
We study phase portraits of a first order implicit differential equation in a
neighborhood of its pleated singular point that is a non-degenerate singular
point of the lifted field. Although there is no a visible local classification
of implicit differential equations at pleated singular points (even in the
topological category), we show that there exist only six essentially different
phase portraits, which are presented
Results of experiments for the detection of lunar ionosphere carried out on the first moon's artificial satellite /Luna-10/
Lunik X experiments to detect lunar ionospher
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