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 with ...

PROF. CRUMRINE PATTERSON declares that his motive in writing this text-book of projective geometry was "the feeling that a more complete discussion than is usual in elementary textbooks is desirable".

The 3 spatial dimensions that we perceive. Source: Drawing and Photograph by Ezequiel Morsella, 4/4/2022 Scientists from around the globe have come together to discuss the nature of consciousness (see ...