December 21st, 2018, 09:43 AM  #1 
Senior Member Joined: Nov 2011 Posts: 247 Thanks: 3  examples to nonsmooth manifolds
When manifolds is not smooth? Which examples can I get from you for this kind of manifolds? 
December 21st, 2018, 09:57 AM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,780 Thanks: 970  
December 21st, 2018, 10:52 AM  #3 
Senior Member Joined: Nov 2011 Posts: 247 Thanks: 3 
Can someone give me a site to dummies in this subject? I don't understand this website. 
December 22nd, 2018, 07:36 AM  #4 
Senior Member Joined: Sep 2016 From: USA Posts: 531 Thanks: 304 Math Focus: Dynamical systems, analytic function theory, numerics 
Do you know what a manifold is? Do you know what a smooth function is? You should start with these topics. I have a lot of trouble believing anyone can simultaneously understand these concepts but not be able to produce an example of a nonsmooth manifold. If you don't understand the link Denis provided then this is further evidence you aren't familiar with smooth functions or manifolds. 

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examples, manifolds, nonsmooth 
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