THIS text-book of modern projective geometry forms an admirable introduction to the subject, and should be known to all who are interested in this branch of mathematics. The first chapter deals ...

About this article Cite this article M., G. Quadratic Forms and their Classification by Means of Invariant Factors The Axioms of Projective Geometry The Axioms of Descriptive Geometry .

The use of the overhead projector (OP) as a teaching aid has spread very rapidly and widely and is recommended by educators, but its effectiveness in general and in specific subjects has not been ...