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On Cremona transformations of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="double-struck">P</mml:mi></mml:mrow><mml:mrow><mml:mn>3</mml:mn></mml:mrow></mml:msup></mml:math> with all possible bidegrees
For every orderer pair (d,e) of integer numbers d,eā©¾2, such that dā©½eā©½d, we construct a birational map P3 defined by homogeneous polynomials of degree d whose inverse map is defined by homogeneous polynomials of degree e. Pour chaque paire ordonnĆ©e (d,e) dŹ¼entiers satisfaisant d,eā©¾2 et dā©½eā©½d, nous construisons une application ā¦