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New posts in Manifolds
Is there an easy proof that every closed curve is contained in a ball?
May 05, 2021
Affine Transformations isomorphic to Heisenberg group
May 05, 2021
There are open sets $U$ and $V$ such that $U\cap V = \emptyset $ and $ U \cap \tau(V) =\emptyset $?
May 04, 2021
Why is a manifold called a manifold?
May 04, 2021
If $X \times Y$ is Separable, are $X, Y$ Separable?
May 04, 2021
Application of implicit function theorem?
May 04, 2021
Can I comb unoriented hair on a ball?
May 04, 2021
Check or falsify: there is a $C^\infty$ surjective map $S^1 \to S^1 \times S^1$.
May 04, 2021
Give me an example of a topological manifold which is not a smooth manifold.
May 04, 2021
What's the difference between time-dependent flow (isotopy) and time-independent flow?
May 03, 2021
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