6533b7d4fe1ef96bd1262749

RESEARCH PRODUCT

Una generalizzazione del birapporto sopra un anello

Leonardo CirlincioneMaria Rosaria Enea

subject

Discrete mathematicsRing (mathematics)Pure mathematicsGeneral MathematicsProjective lineBijectionAlgebra over a fieldCommutative propertyMathematics

description

We generalize to the case of the projective line over a (not necessarily commutative) ring the well-know theorem on the bijective maps preserving a given cross-ratio.

https://doi.org/10.1007/bf02844762