The class ... is not stable by small deformations.
The Clifford bundle and the dynamics of the superparticle
Using the Clifford bundle formalism we show that Frenet equations of classical differential geometry or its spinor version are the appropriate equations of motion for a classical spinning particle. We show that particular values of the curvatures appearing in Darboux bivector of the spinor form of Frenet equations produce a "classical" Dirac-Hestenes equation. Using the concept of multivector Lagrangians and Hamiltonians we provide a Lagrangian and Hamiltonian approach for our theory which then...
Twistor examples of algebraic dimension zero threefolds.
Twistor spaces over the connected sum of 3 projective planes
Twistor spaces with a pencil of fundamental divisors.