This channel aims to explain a lot of interesting mathematics to a broad audience, to introduce exciting new research directions for geometry, and to fix some of the logical weaknesses of modern pure mathematics. You'll find playlists on Rational Trigonometry (much simpler, more powerful), Linear Algebra, Algebraic Topology, History of Mathematics, Universal Hyperbolic Geometry (a complete new treatment of this subject, a YouTube first!), the Foundations of Mathematics (it needs fixing) and even an elementary introduction to K-6 mathematics. I (N J Wildberger) am a professional mathematician, BSc U. Toronto 1979, PhD Yale 1984 and currently Assoc Prof at UNSW, with over 40 papers, one book, and a love of teaching.If you would like to become a Patron of this Channel to support the videos I am making, please sign up at https://www.patreon.com/njwildberger?ty=h. Patrons will have access to a suite of pdf files which capture the video screens, making learning even easier.