1.2.40 `sm1.ecart_homogenize01Ideal'
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sm1.ecart_homogenize01Ideal(A)
     :  It (0,1)-homogenizes the ideal A[0]. Note that it is not an
     elementwise  homogenization.
Example:

      input1
        F=[(1-x)*dx+1]$ FF=[F,"x,y"]$
        sm1.ecart_homogenize01Ideal(FF);
      intput2
        F=sm1.appell1([1,2,3,4]);
        sm1.ecart_homogenize01Ideal(F);

