Let and be rational groups, i.e. torsion-free groups of rank-1 and thus subgroups of the rational numbers. This paper gives a short overview of the structure of Ext() especially considering some interesting classes of torsion-free pairs.
Publié le :
DOI : 10.4171/RSMUP/5
DOI : 10.4171/RSMUP/5
Classification :
20, 00
Mots-clés : Abelian group, extension, rational group, torsion-free
Mots-clés : Abelian group, extension, rational group, torsion-free
Affiliations des auteurs :
Friedenberg, Stefan 1 ;
Wolf, Paul 1
@article{RSMUP_2018__140__123_0, author = {Friedenberg, Stefan and Wolf, Paul}, title = {A brief journey through extensions of rational groups}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, pages = {123--128}, publisher = {European Mathematical Society Publishing House}, address = {Zuerich, Switzerland}, volume = {140}, year = {2018}, doi = {10.4171/RSMUP/5}, mrnumber = {3880214}, zbl = {1472.20120}, url = {http://www.numdam.org/articles/10.4171/RSMUP/5/} }
TY - JOUR AU - Friedenberg, Stefan AU - Wolf, Paul TI - A brief journey through extensions of rational groups JO - Rendiconti del Seminario Matematico della Università di Padova PY - 2018 SP - 123 EP - 128 VL - 140 PB - European Mathematical Society Publishing House PP - Zuerich, Switzerland UR - http://www.numdam.org/articles/10.4171/RSMUP/5/ DO - 10.4171/RSMUP/5 ID - RSMUP_2018__140__123_0 ER -
%0 Journal Article %A Friedenberg, Stefan %A Wolf, Paul %T A brief journey through extensions of rational groups %J Rendiconti del Seminario Matematico della Università di Padova %D 2018 %P 123-128 %V 140 %I European Mathematical Society Publishing House %C Zuerich, Switzerland %U http://www.numdam.org/articles/10.4171/RSMUP/5/ %R 10.4171/RSMUP/5 %F RSMUP_2018__140__123_0
Friedenberg, Stefan; Wolf, Paul. A brief journey through extensions of rational groups. Rendiconti del Seminario Matematico della Università di Padova, Tome 140 (2018), pp. 123-128. doi : 10.4171/RSMUP/5. http://www.numdam.org/articles/10.4171/RSMUP/5/
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