On projective 3-space

الملخص EN

The purpose of this work is to give some definitions and prove some theorems on projective 3-space S = PG (3, K) over a fieldK.

Also, the principle of duality in S is given which state that any theorem true in the projective 3-space concerned with the points, planes and the incidence relation, the same theorem is true by interchanging "point" and "plane" whenever they occur, where as the dual of a line is a line.