#incidence and containment in affine spaces
as := AG(3,16);
p := AffineSubspace(as,[1,0,0]*Z(16)^0);
l := AffineSubspace(as,[1,0,0]*Z(16),[[0,1,1]]*Z(16)^0);
plane := AffineSubspace(as,[1,0,0]*Z(16)^0,[[1,0,0],[0,1,1]]*Z(16)^0);
p in p;
p in l;
l in p;
l in plane;
plane in l;
p in plane;
p in as;
l in as;
plane in as;
as in p;
IsIncident(p,l);
IsIncident(l,p);
IsIncident(l,plane);
IsIncident(plane,l);
IsIncident(p,plane);
IsIncident(plane,p);
quit;
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