Projection sur quelques courbes planes  
Implementation avec le logiciel  libre Octave 
[Copyright 2005 John W. Eaton, voir //www.octave.org/]
dans la version 2.1.71. 
                                             Francois Dubois, juillet 2026 
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projhyper01.m    projections sur l hyperbole x**2 - y**2 = 1
projhyper02.m    projections sur la quasi hyperbole x**4 - y**4 = 1



Nous recommandons de les executer dans cet ordre.
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