11 Jan
2010
11 Jan
'10
7:14 p.m.
Quoting Dan Asimov <dasimov@earthlink.net>:
Suddenly I have no idea what this means. One of the axioms of a metric (or rather a norm on which a metric is based) is
||X|| = 0 <=> X = 0.
There's norms and then there's metrics. Minkowsky space has its light cone - non-zero vectors of length zero, and phase space has its symplectic metric with coordinates and momenta. - hvm ------------------------------------------------- www.correo.unam.mx UNAMonos Comunicándonos