00733nam a2200169Ia 450000500170000000800410001702000130005808200160007110000200008724500710010726000090017830000180018750502300020594200080043599900170044395201030046020241211205650.0241211s1950    xx            000 0 und d  afcnm2587  a515.43I/A13  aAl´ ber, S. I. 0aOn Periodicity Problems in the Calculus of Variations in the Large  c1950  a274 páginas  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.  yLIB  c51808d51808  00104070aBE-FCNMbBE-FCNMcTPd2018-11-20eDonacionfBuenoo515.43I/A13pFCNM4044yLIBzInterno