Timeline for Can every $\mathbb{Z}^2$ disk be pinball-reached?
Current License: CC BY-SA 3.0
5 events
| when toggle format | what | by | license | comment | |
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| Apr 22, 2013 at 4:46 | comment | added | Gerhard Paseman | In using the silver circles, I normally just have a small portion of arc that is needed when I am travelling horizonally only or vertically only. When I change directions (or when I need to go to a neighboring nonslver circle), instead of needing access to a few degrees of arc, I need access to more than 90 degrees off of a silver circle, as to have the flexibility of bouncing off either the left or the right side of that circle. If I plan my route, I actually need less than 20 degrees, even when r is a little more than 1/root(5). Gerhard "Ask Me About System Design" Paseman, 2013.04.21 | |
| Apr 22, 2013 at 0:19 | comment | added | S. Carnahan♦ | Where do you use the "120 degrees" condition? I see it mentioned twice as something to be satisfied, but it never seems to be applied. | |
| Apr 20, 2013 at 2:19 | comment | added | Joseph O'Rourke | I like the phrase, "spectrum of angles"! | |
| Apr 20, 2013 at 2:00 | comment | added | Gerhard Paseman | Tilting my head 45 degres, it looks like r can even be slightly larger than 1/root(8) for this construction to work. For r close to 1/2, something different is needed. Gerhard "Easier Than Tilting The Picture" Paseman, 2013.04.19 | |
| Apr 20, 2013 at 1:53 | history | answered | Gerhard Paseman | CC BY-SA 3.0 |