@terrycavanagh @navaboo popular maths books can all die in a fire. [ALL OF THEM.] Penrose's "the road to reality"'s math contents I liked.
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
@terrycavanagh @navaboo popular maths books can all die in a fire. [ALL OF THEM.] Penrose's "the road to reality"'s math contents I liked.