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Harry West's user avatar
Harry West's user avatar
Harry West's user avatar
Harry West
  • Member for 4 years
  • Last seen more than 2 years ago
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Amateur mathematician interested in the axiom of choice

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Top posts
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question
7
Paradoxical sums of non-integrable measurable functions
Jul 21, 2021
answer
6
What sorts of (sets of) equations are "approximately compatible" with the $2$-sphere?
Jun 15, 2021
question
5
Uncountable Boolean algebra in ZFC with a countable ultrahomogeneity property
Aug 10, 2021
answer
4
Is it a theorem of ZF that every partial order can be extended to another that makes the set directed?
Oct 17, 2020
answer
4
Does $\mathsf{ZFC}$ prove that the field of real numbers has one of these compactness properties?
Jun 13, 2021
question
3
Meager or measure zero $A\subset \mathbb R$ with $A+A=A$ and $A-A=\mathbb R$
Jul 2, 2021
answer
3
Is Sobolev limit of bijective maps surjective?
Sep 2, 2020
answer
3
Does "zero dimensional domains are fields" require the Boolean Prime Ideal theorem?
Jun 1, 2021
answer
3
Do these topologies always refine the Euclidean topology somewhere?
Jun 5, 2021
answer
3
Is there a noncomputable set whose noncomputability is hard to witness?
Jun 5, 2021
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13
Without choice, can every homomorphism from a profinite group to a finite group be continuous?
12
Is there an example of a non measurable function with a measurable graph?
11
Existence of translation-invariant basis on $C_c(\mathbb R)$
8
Detecting uncountable cardinals in $(\mathbb{R};+,\times,\mathbb{N})$
7
Does the random graph interpret the random directed graph?