Date: Feb 27, 2013 8:15 AM
Author: Hauke Reddmann
Subject: Re: A topological problem

Ken Pledger <ken.pledger@vuw.ac.nz> wrote:

> Can you move a crossing past an o? If so, the thing is a planar
> graph: just move the four corner o's, top to bottom and bottom to top.


> That fulfils your condition about horizontal lines. But is there some
> other restriction on moving the crossings?


Oh. Sorry. The o are nailed to the plane and may not be moved.
(You can move the O, though.)
--
Hauke Reddmann <:-EX8 fc3a501@uni-hamburg.de
Die Weltformel: IQ+dB=const.