00637nam a2200157Ia 4500 260427b |||||||| |||| 00| 0 eng d 512 F752.TE Fossum, Robert M. 22416 Trivial extensions of abelian categories : Homological algebra of trivial extensions of abelian categories with applications to ring theory / Berlin: Springer-Verlag, 1975 xi, 122p. Lecture notes in Mathematics 456 Griffith, Phillip A. author. 22417 Reiten, Idun author. 22418 ddc BK 0 0 0 512_000000000000000_F752_TE 0 11377 ISI ISI 1998-09-08 0 512 F752.TE DP11632 2019-02-14 00:00:00 BK 9231 9231