CONTENTS§ 1. Introduction.......................................................................................................................................... 5§ 2. Definitions and lemmas................................................................................................................... 7§ 3. Theorem on the isomorphism of subdirect sums with the same kernels............................. 15§ 4. The group of automorphisms of a torsion-free abelian group of rank two............................. 53§ 5. The ring of endomorphisms of torsion-free abelian group of rank two................................... 63References.................................................................................................................................................. 73
@book{bwmeta1.element.desklight-1ba998fe-e933-42c6-92c7-2a56016b2530, author = {M. Kr\'ol}, title = {The automorphism groups and endomorphism rings of torsion-free abelian groups of rank two}, series = {GDML\_Books}, publisher = {Instytut Matematyczny Polskiej Akademi Nauk}, address = {Warszawa}, year = {1967}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-1ba998fe-e933-42c6-92c7-2a56016b2530} }
M. Król. The automorphism groups and endomorphism rings of torsion-free abelian groups of rank two. GDML_Books (1967), http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-1ba998fe-e933-42c6-92c7-2a56016b2530/