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DanielWainfleet's user avatar
DanielWainfleet's user avatar
DanielWainfleet
  • Member for 8 years, 9 months
  • Last seen more than a month ago
  • Wainfleet, ON, Canada
13 votes
1 answer
508 views

Is there a non-trivial countably transitive linear order?

6 votes
2 answers
376 views

Density of a dense subspace of a Hausdorff space

6 votes
0 answers
131 views

What is the set of cardinals of the remainders of compactifications of $\mathbb R$?

4 votes
0 answers
123 views

Existence of two subsets of $\mathbb R$ with a certain property, undecidable in $ZF$?

3 votes
1 answer
84 views

Cardinal of the set of subfields of the reals.

3 votes
0 answers
502 views

Continuous linear bijection of a Banach space is a homeomorphism

3 votes
1 answer
120 views

Are the hyper-reals countably transitive?

3 votes
1 answer
245 views

Prove that $n+2$ points in $\Bbb R^n$ cannot all be at a unit distance from each other. [duplicate]

2 votes
1 answer
44 views

Possible set of fibers of a point-wise limit of a sequence of continuous real functions.

2 votes
0 answers
114 views

Countably closed Boolean algebra of subsets of the real plane,

2 votes
1 answer
141 views

Tychonoff space with unique compactification and 3 disjoint non-compact closed subsets

2 votes
1 answer
89 views

No stalemate in a modified version of Martin Gardner's game of Chomp?

1 vote
0 answers
171 views

Sigma-algebra generated by the generalized rectangles

1 vote
1 answer
94 views

Discontinuous $ f : \mathbb R^2 \to \mathbb R$ with unusual topology on $ \mathbb R$

1 vote
0 answers
122 views

Maximal compactifications without the Tychonoff theorem

1 vote
1 answer
122 views

Number puzzle : "You can't determine my sum."

1 vote
0 answers
259 views

Topological cardinal function : The grasp

1 vote
2 answers
130 views

Low value attained by real function with positive second derivative.

1 vote
1 answer
101 views

Infinite subset of a metric space has an infinite r-discrete subset or a non-trivial Cauchy sequence

1 vote
1 answer
83 views

Is this additive subgroup of $\Bbb R$ a Bernstein set?

0 votes
1 answer
97 views

Elementary triangle /areas ratio question

0 votes
1 answer
101 views

Is union of a countable set of Tarski-finite sets countable in ZF? Reference request.