.
Algebraic Surface
4 (phi2 x2 - y2) (phi2 y2 - z2) (phi2 z2 - x2) - (1 + 2 phi) (x2 + y2 + z2 - w2)2 w2 = 0
Undergraduate Texts in Mathematics
4 (phi2 x2 - y2) (phi2 y2 - z2) (phi2 z2 - x2) - (1 + 2 phi) (x2 + y2 + z2 - w2)2 w2 = 0
Undergraduate Texts in Mathematics