2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66872Let an affine space of dimension n over a field k. To each point correponds a section of the linear group G to the affine group. Generally, every section is like this, excpt in the case card(k)=2 and n=3, where G is the group of cardinality 168.20 pages. Submited to "L'enseignement mathematique"Group Theory20D60; 20E32; 20F32text