He showed that that surface was a curve in projective space, that its equation was x3y + y3z + z3x = 0, and that its group of symmetries was PSL(2,7) of order 168.
On pokazuje da je površina kriva u projektivnom prostoru, i da je njena jednačina x3y + y3z + z3x = 0, a da njena grupna simetrija PSL(2,7) reda 168.