The rejected zone and sector of shading by tail of airplane that a pulse-Doppler radar has got was described. A combined influence of these sectors was analyzed on the base cite formulas and quantitative assessment was produced for airplanes tracking time. The results of mathematical simulation was described according to flight parameters of observed airplanes.
Let G be a semisimple algebraic group whose decomposition into the product of simple components does not contain simple groups of type A, and P⊆G be a parabolic subgroup. Extending the results of Popov , we enumerate all triples (G, P, n) such that (a) there exists an open G-orbit on the multiple flag variety G/P × G/P × . . . × G/P (n factors), (b) the number of G-orbits on the multiple flag variety is finite.
I give the explicit formula for the (set-theoretical) system of Resultants of m+1 homogeneous polynomials in n+1 variables