Add Yahoo as a preferred source to see more of our stories on Google. A Chinese genius flexed his mathematical prowess by solving a problem that flummoxed a team of mathematicians with Ph.D.s for four ...

You're currently following this author! Want to unfollow? Unsubscribe via the link in your email. Follow Alistair Barr Every time Alistair publishes a story, you’ll get an alert straight to your inbox ...