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gap> ps := PG(3,9);
ProjectiveSpace(3, 9)
gap> sub := VectorSpaceToElement(ps,[[1,0,1,0],[0,1,0,1],[1,2,3,0]]*Z(3)^0);
<a plane in ProjectiveSpace(3, 9)>
gap> p1 := VectorSpaceToElement(ps,[1,0,1,2]*Z(3)^0);
<a point in ProjectiveSpace(3, 9)>
gap> p2 := VectorSpaceToElement(ps,[1,2,0,2]*Z(3)^0);
<a point in ProjectiveSpace(3, 9)>
gap> phi := ElationOfProjectiveSpace(sub,p1,p2);
< a collineation: <cmat 4x4 over GF(3,2)>, F^0>
[ Dauer der Verarbeitung: 0.12 Sekunden
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