On 3/16/07, Bruno Marchal <[EMAIL PROTECTED]> wrote:
> I don't know what you mean by a physical knots. In any case the > identity of a knots (mathematical, physical) rely in its topology, not > in such or such cartesian picture, even the "concrete" knots I put in > my pocket. The knots looses its identity if it is cut. There are related examples, like letters of the alphabet, which survive even non-topological transformations and defy any algorithmic specification. Nevertheless, any particular concrete example of a knotted string or letter on a page is completely captured by a physical description. There is no special knottiness or letterness ingredient that needs to be added to ensure that they are knots or letters. Stathis Papaioannou --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to everything-list@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/everything-list?hl=en -~----------~----~----~----~------~----~------~--~---
