00738nam a2200181Ia 450000500170000000800410001702000120005808200160007010000200008624500340010625000080014026000550014830000180020350502080022194200080042999900170043795201020045420241211205620.0241211s1970    xx            000 0 und d  afcnm671  a512.55I/R85  aRotman, Joseth. 0aNotes on Homological Algebras  a1ra  aUnited States of america :bVan Nostrand R.,c1970  a211 páginas  a1.Elementary definitions. 2.Introduction. 3.Projective. 4.Injective and flats. 5.Particular rings. 6.Group extensions. 7.Homology. 8.Ext. 9.Tor. 10.Son of particular rings. 11.Cohomology of group retums.  yLIB  c49904d49904  00104070aBE-FCNMbBE-FCNMcTPd2017-09-18eDonacionfBuenoo512.55I/R85pFCNM994yLIBzInterno