A 'hyperbolic' Horner surface 2 of the second degree [Une surface 2 de Horner 'hyperbolique' du second degré].
pX0001=-2.2 pX0110=+1.0 pX0120=+1.0 pX1010=+1.0 pX2002=+1.0
pY0001=-1.0 pY0101=+1.0 pY0220=+1.0 pY1201=+1.0
pZ0110=+1.0 pZ1000=+1.0 pZ2012=+1.0 pZ2020=+1.0