:Thanks! I'm not really sure what to do with that one -- the notion and examples are obvious to anyone who knows what a smooth manifold is, but not very useful to anyone else. It's a hard thing to motivate. But hopefully the exotic spheres will be news to some. Jump in if you have any ideas to make it easier to read for people with less background! | :Thanks! I'm not really sure what to do with that one -- the notion and examples are obvious to anyone who knows what a smooth manifold is, but not very useful to anyone else. It's a hard thing to motivate. But hopefully the exotic spheres will be news to some. Jump in if you have any ideas to make it easier to read for people with less background! |