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December 21st, 2018, 08:43 AM   #1
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examples to non-smooth manifolds

When manifolds is not smooth?
Which examples can I get from you for this kind of manifolds?
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December 21st, 2018, 08:57 AM   #2
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https://math.stackexchange.com/quest...-is-not-smooth
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December 21st, 2018, 09:52 AM   #3
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Can someone give me a site to dummies in this subject?
I don't understand this website.
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December 22nd, 2018, 06:36 AM   #4
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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 non-smooth 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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