Uspekhi Mat. Nauk, 1950, Volume 5, Issue 6(40)

JOURNALS // Uspekhi Matematicheskikh Nauk // Archive

1950, Volume 5, Issue 6(40)

	Variational methods of solution of problems of mathematical physics S. G. Mikhlin	3
	Estimation of the number of critical points L. È. Èl'sgol'ts	52
	Summary of results in homotopy theory of continuous transformations of a sphere into a sphere V. A. Rokhlin	88
	On the theory of singular differential operators I. M. Glazman	102

In the Moscow Mathematical Society
	Meetings of the Moscow Mathematical Society	136

Scientific notes and problems
	The equivalence of families of $B$-sets Yu. S. Ochan	139
	On the equivalence of families of sets A. A. Lyapunov	143
	On the rigidity of the lateral surface of a closed cylindroid I. G. Il'in	145
	On irreducible cyclic bicompacta Yu. M. Smirnov	157

Mathematical Events in the USSR
	Boris Nikolaevich Delone (photo)
	Boris Nikolaevich Delone (for his 60th birthday) D. K. Faddeev	159
	First School Mathematical Competition in Stalingrad V. S. Potapov	164
	Second Smolensk Mathematical Competition M. B. Balk, I. L. Raukhvarger	166

Methodical issues
	Discussion of the article of A. D. Aleksandrov “On the bases of differential geometry and their presentation” at the Department of Differential Geometry of the Moscow State University	169

Reviews and Bibliography
	B. N. Delone, D. A. Raikov, Analytical geometry, vols. I, II (review) I. I. Gordon	180