Question Number 159011 by SANOGO last updated on 11/Nov/21
$${G}:{N}\rightarrow{N} \\ $$$${n}\rightarrow\left\{_{{n}+\mathrm{1}\:{si}\:{n}\:{est}\:{paire}} ^{{n}\:\:{si}\:{n}\:{est}\:{impair}} \right. \\ $$$${g}\:{est}−{il}\:{inject}\:,{surject}\:{ou}\:{biject}? \\ $$