1. 3-Selmer groups for curves $y^2=x^3+a$ Creator: Bandini, Andrea Format: bez média and svazek Type: model:article and TEXT Subject: elliptic curves and Selmer groups Language: English Description: We explicitly perform some steps of a 3-descent algorithm for the curves $y^2=x^3+a$, $a$ a nonzero integer. In general this will enable us to bound the order of the 3-Selmer group of such curves. Rights: http://creativecommons.org/publicdomain/mark/1.0/ and policy:public