0000000000230984

AUTHOR

Maria Rosaria Enea

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Una generalizzazione del birapporto sopra un anello

1990

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.

Discrete mathematicsRing (mathematics)Pure mathematicsGeneral MathematicsProjective lineBijectionAlgebra over a fieldCommutative propertyMathematicsRendiconti del Circolo Matematico di Palermo
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