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/sci/ - Science & Math

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>> No.9064752 [View]
File: 89 KB, 624x576, 0007.jpg [View same] [iqdb] [saucenao] [google]
9064752

>>9064750
I don't know. I've never been to Germany.

>> No.8513268 [View]
File: 95 KB, 624x576, 1480509887596.jpg [View same] [iqdb] [saucenao] [google]
8513268

I chose it because it is interesting. That is sufficient.

>> No.8458236 [View]
File: 89 KB, 624x576, 0007.jpg [View same] [iqdb] [saucenao] [google]
8458236

>>8458148
That actually seems a logical reason behind the nomenclature.

"I just bit my coffee cup and broke my teeth"
- Felix Hausdorff

>> No.8454953 [DELETED]  [View]
File: 89 KB, 624x576, 0007.jpg [View same] [iqdb] [saucenao] [google]
8454953

"I think a surjections are epic"
- Saunders Mac Lane

>> No.8451673 [View]
File: 89 KB, 624x576, 0007.jpg [View same] [iqdb] [saucenao] [google]
8451673

>Or what about pic related?
If, instead of R^3, you use the torus as the space to embed things into, it is open if mapped like in the pic, as that is an intersection of the torus and an open ball in R^3, in the subspace topology of the torus, this is an open set. Now, you may think this contradicts Hatcher's claim, but nope. The torus is a 2-manifold, and thus locally homeomorphic to R^2.

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