mersenneforum.org Pseudometric spaces and Lipschitz continuity
 Register FAQ Search Today's Posts Mark Forums Read

 2011-03-04, 13:55 #1 hallstei     Apr 2005 11012 Posts Pseudometric spaces and Lipschitz continuity Hi, does anyone know if the concept of Lipschitz continuity is well-defined on pseudometric spaces, the way it is on metric spaces?
 2011-03-04, 15:16 #2 rajula     "Tapio Rajala" Feb 2010 Finland 32·5·7 Posts It is well-defined.
2011-03-04, 20:43   #3
R.D. Silverman

"Bob Silverman"
Nov 2003
North of Boston

1D5416 Posts

Quote:
 Originally Posted by hallstei Hi, does anyone know if the concept of Lipschitz continuity is well-defined on pseudometric spaces, the way it is on metric spaces?
You've asked a question that I can't answer because I do not know
what a pseudometric space is.

2011-03-05, 01:56   #4
R.D. Silverman

"Bob Silverman"
Nov 2003
North of Boston

22·1,877 Posts

Quote:
 Originally Posted by R.D. Silverman You've asked a question that I can't answer because I do not know what a pseudometric space is. Please enlighten me.
Never mind. I looked it up. I have never encountered a metric space
where d(x,y) can equal 0 for some x!=y. Does anyone have a natural
example where the space is defined on a Riemann manifold? What might
such a distance function look like?

Can a (topological) subspace of (say) a Banach or Hilbert space be
pseudometric?

As I have said before, topology is one of my weak areas.

2011-03-05, 09:54   #5
hallstei

Apr 2005

13 Posts

Quote:
 Originally Posted by rajula It is well-defined.
Thank you very much.

 Similar Threads Thread Thread Starter Forum Replies Last Post LiquidNitrogen No Prime Left Behind 18 2011-08-04 02:58 jinydu Lounge 0 2009-12-27 13:46 hallstei Homework Help 4 2009-07-02 20:56 ewmayer Miscellaneous Math 2 2008-11-26 17:13

All times are UTC. The time now is 10:36.

Tue Jan 31 10:36:00 UTC 2023 up 166 days, 8:04, 0 users, load averages: 0.91, 1.10, 1.06