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Henno Brandsma

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Name Henno Brandsma
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Location the Netherlands
Age 43
Dutch topologist, now working in other fields.
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Collatz conjecture solved? [closed]

jun 2 11 at 18:03 Henno Brandsma 2,236●7●19

 

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20
Is R^3 the square of some topological space?
15
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14
Quick proofs of hard theorems
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12
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8
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Discrete subspaces of Hausdorff spaces
7
Writing papers in pre-LaTeX era?
7
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6
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Lebesgue dimension of images
5
Elementary+Short+Useful
5
Locally compact Hausdorff space that is not normal
5
The core question of topology
5
Must a linearly ordered, separable space be metrizable?
4
A question on metrizable space
4
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4
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Countable paracompactness, normality and locally countable open covers
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3
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3
Question about closed projection
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Locally complete space is topologically equivalent to a complete space
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Fundamental Examples
3
Topological spaces, uncountable subsets and separability
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CCC +　collectionwise normality =>　paracompact?
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Question about 0-dimensional Polish spaces
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Topology generated by the collection of open sets
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