Mike Stay> On Wed, Aug 29, 2012 at 6:24 AM, James Propp <jamespropp@gmail.com <http://gosper.org/webmail/src/compose.php?send_to=jamespropp%40gmail.com>> wrote:> Has anyone created interactive software that lets one zoom in on the real line? I'm imagining a line on the screen that doesn't change at all as you zoom in. -- Mike Stay - metaweta@gmail.com <http://gosper.org/webmail/src/compose.php?send_to=metaweta%40gmail.com>http://www.cs.auckland.ac.nz/~mikehttp://reperiendi.wordpress.com No, no, that's much too thick! You shouldn't be able to see it. Apropos nonelectronic calculation, if you have a youngster, hardcopy it this extended times table <http://gosper.org/kellytable.png>. Filling this in should cement intuitions about minus times minus, even times odd, primes, and progressions, e.g. --rwg Apologies for many links breaking on gosper.org . We're looking into it. I'll fix the ones people tell me.