Defining defoe and delillo

> dparubombieri:= simplify(subs({(z -u^3 -u*z^2*c1 -z^3*c2)^p = 0, (u^3)^p=0, (u*z^2*c1)^p =0, (z^3 *c2)^p = -p*bombieri, z^p =0},dparuu));

> dparzbombieri:= simplify(subs({(z -u^3 -u*z^2*c1 -z^3*c2)^p = 0, (u^3)^p=0, (u*z^2*c1)^p =0, (z^3 *c2)^p = -p*bombieri, z^p =0},dparzz));

> defoe:= - numer(dparubombieri);

> delillo:= - numer(dparzbombieri);

>