Projective spinor geometry and prespace

A method originally conceived by Bohm for abstracting key features of the metric geometry from an underlying spinor ordering is generalized to the projective geometry. This allows the introduction of the spinor into a projective context and the definition of an associated geometric algebra. The projective spinor may then be regarded as defining a pregeometry for the projective space.This article is dedicated to Professor David Bohm on the occasion of his 70th birthday. I would like to take this opportunity to offer him my warmest congratulations and also to express to him my sincerest appreciation for this kindness, guidance, and inspiration over many years.