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Halfdan Faber
  • Member for 12 years, 7 months
  • Last seen more than 1 year ago
61 votes
41 answers
35k views

Major mathematical advances past age fifty

10 votes
3 answers
7k views

Status of Beal, Granville, Tijdeman-Zagier Conjecture [closed]

6 votes
2 answers
2k views

Axiom of Computable Choice versus Axiom of Choice

4 votes
2 answers
1k views

Hausdorff dimension vs. cardinality

4 votes
1 answer
782 views

Responses from mathematicians concerning Flash trading [closed]

3 votes
2 answers
1k views

Cardinality of the set of all paths in the infinite complete infinitary tree

3 votes
1 answer
453 views

Path cardinality for random $(a+b)$-ary infinite trees

3 votes
1 answer
11k views

What is the longest known sequence of consecutive zeros in Pi? [closed]

3 votes
1 answer
2k views

What is the path cardinality of an infinite binary tree with fractal boundary of constant dimension below 1?

2 votes
1 answer
706 views

Infinite graphs as functional operators

1 vote
2 answers
922 views

What is cardinality of the set of true undecidable minimal sentences in a formal theory of aritmetic