On 1/24/2020 8:34 PM, Alan Grayson wrote:
On Friday, January 24, 2020 at 8:47:26 PM UTC-7, Brent wrote: On 1/24/2020 7:01 PM, Alan Grayson wrote:On Friday, January 24, 2020 at 6:58:29 PM UTC-7, Brent wrote: A closed curve on a sphere with a point not on the curve can be contracted to a point without crossing the point not the curve no matter where that point is. Brent Doesn't seem right. If we have a circle on the sphere, and a point at its center, your claim will fail. AGNo it won't. Just "expand" the circle till it contracts to the anti-podal point. Brent OK. Is there a formal name for this property? AG
Spherical topology. Brent -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/05ca952d-9243-32da-9ecb-0cf93220935e%40verizon.net.
