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math.AG2009
Affine functors and duality
J. Navarro, C. Sancho, P. Sancho
A functor of sets over the category of -commutative algebras is said to be an affine functor if its functor of functions, , is reflexive and $…
math.GR2009
Automorphisms of classical geometries in the sense of Klein
Alberto Navarro, Jose Navarro
In this note, we compute the group of automorphisms of Projective, Affine and Euclidean Geometries in the sense of Klein. As an application, we give a simple construction of the ou…