1983, Number 6

The issue is dedicated to the 100th anniversary of the academician Nikolai Nikolaevich Luzin

	Nikolaj Nikolaevich Luzin (on his 100th birthday)		3
	Spaces of functions and conditions of completeness type A. V. Arkhangel'skii		4–9
	Hydrodynamics of Hamiltonian systems V. V. Kozlov		10–22
	Sharp estimates in Hölder spaces for generalized solutions of the biharmonic equation, the system of Navier–Stokes equations and the von Kármán system in nonsmooth two-dimensional domains V. A. Kondratiev, O. A. Oleinik		22–39
	On the theory of selfadjoint quadratic operator pencils A. G. Kostyuchenko, A. A. Shkalikov		40–51
	Independence of the spectrum of an elliptic operator with random coefficients A. S. Mishchenko, F. Sharipov		51–56
	Marcinkiewicz means of double Fourier integrals in $H_p$ ($p\le1$) P. Oswald		56–63
	Uniqueness of series in a Haar system with monotone coefficients P. L. Ul'yanov		63–73
	Luzin's problems on constituents and their fate V. A. Uspenskii, V. G. Kanovei		73–87
	Absolute minima of the volume functional and of the Dirichlet functional on Riemannian manifolds A. T. Fomenko		87–94
	The basic lemma of the method of proof of algebraic independence of values of $E$ -functions A. B. Shidlovskii		94–98
	Existence of homoclinic motions S. V. Bolotin		98–103