It’s well known that you can construct the octonions using triality. One statement of triality is that Spin ( 8) has nontrivial outer automorphisms of order 3. On the other hand, the octonions have ...

Feb 15, 2011 See a 4-dimensional proof of Heron’s formula for the area of a triangle. Classifying by Generalizing: The Theory of Accessibility Relative to a Limit Doctrine May 20, 2014 Summarizes “A ...