What's in a proof? Here's an interesting read on proof structure and the beauty of "beyond any doubt":
A mathematical proof isn't just an intellectual exercise https://t.co/DFGlogUXFh via @physorg_com
Have you ever heard of Möbius strips before (a 3D shape with one side and one edge)? How about a Kaleidoscope? Here's an interesting combination of both. Learn more about the Möbius Kaleidocycle
https://t.co/UoxtwikV1r
This is an excellent tool for putting together image and/or PDF files together into a single PDF document. Hope it proves to be helpful!
Online PDF Combiner https://t.co/3096ZxX3U3