Adam P. Goucher's user avatar
Adam P. Goucher's user avatar
Adam P. Goucher's user avatar
Adam P. Goucher
  • Member for 10 years, 7 months
  • Last seen this week
42 votes
1 answer
4k views

Mathematicians wearing hats on arbitrary total orders

40 votes
2 answers
2k views

Ultrafilters as a double dual

31 votes
1 answer
2k views

Can R^3 be expressed as a disjoint union of pairwise linked circles?

18 votes
2 answers
689 views

Can all unit-distance graphs have their vertices at algebraic integers?

16 votes
2 answers
1k views

Algebraic surface of constant width?

15 votes
1 answer
568 views

Is this theory decidable?

14 votes
1 answer
553 views

How to roll a $p$

13 votes
2 answers
2k views

Why is weak Kőnig's lemma weaker than Kőnig's lemma?

11 votes
1 answer
399 views

Traveling Salesman Problem on finite group

11 votes
0 answers
327 views

Lattices and stable homotopy groups of spheres

11 votes
0 answers
173 views

Iterated automorphism groups of finite groups

10 votes
1 answer
563 views

Discrete logarithm for polynomials

9 votes
0 answers
447 views

A lattice with Monster group symmetries

7 votes
1 answer
353 views

The space of skew-symmetric orthogonal matrices

7 votes
2 answers
262 views

Elements of absolute value 1 in cyclotomic extension of dyadic rationals

7 votes
3 answers
223 views

Ordinal-indexed transitive antichain of sets with urelements

7 votes
1 answer
2k views

Complexity of graph isomorphism

6 votes
0 answers
147 views

Upper bound on size of obstruction set for wye-delta-wye reducible graphs

6 votes
1 answer
114 views

Bijection from $S^2$ to itself interchanging actions of $A_5$

6 votes
1 answer
139 views

Ramsey theory in infinite-dimensional projective spaces

4 votes
1 answer
143 views

Incomparable NPI decision problems

3 votes
0 answers
43 views

Periodicity of density of laminated lattices

1 vote
1 answer
247 views

Natural bijection between sets with coloured elements?

1 vote
2 answers
444 views

'Positive-definite' matrices over finite fields

1 vote
0 answers
71 views

The invariant of a shape which determines percolation