000			00617nam a2200157Ia 4500
005			20241211205650.0
008			241211s1950 xx 000 0 und d
020			_afcnm2587
082			_a515.43I/A13
100			_aAl´ ber, S. I.
245		0	_aOn Periodicity Problems in the Calculus of Variations in the Large
260			_c1950
300			_a274 páginas
505			_a1.Singular-espectral homoloy theory. 2.The cohomological method of L. A. Lyustemik. 3.The space of circle. 4.The homology of the space of closed curves on a sphere. 5.Estimates of the number of closed geodesics and extremals.
942			_yLIB
999			_c51808 _d51808