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J.M.W Turner's user avatar
J.M.W Turner's user avatar
J.M.W Turner's user avatar
J.M.W Turner
  • Member for 5 years, 5 months
  • Last seen more than a week ago
  • Covent Garden, London, UK
4 votes
2 answers
1k views

Formal definition of euclidean space

2 votes
2 answers
394 views

Is there an algorithm to find the lengths of all paths from a given vertice that can run in polynomial time?

2 votes
0 answers
112 views

Hatcher's Proof of Van Kampen's theorem

2 votes
2 answers
154 views

Hatcher Proposition 1.31

2 votes
0 answers
150 views

Hatcher's representation of coverings spaces as permutations

2 votes
1 answer
67 views

Proving that two links in $\mathbb{R}^{n}$ are not equivalent

1 vote
0 answers
705 views

How to prove that $R^n\setminus \{0\}$ is not contractible

1 vote
0 answers
57 views

Proof of the inscribed rhombus conjecture

1 vote
1 answer
44 views

Defining continuity for functions between surfaces

1 vote
0 answers
259 views

Proving that a closed, non-orientable surface cannot be embedded in $\mathbb{R}^{3}$ using Euler characteristic

1 vote
2 answers
85 views

Hatcher's proof of proposition (c) for covering spaces

1 vote
1 answer
75 views

Connection between fundamental group of circle and division by zero

0 votes
1 answer
58 views

What do we call $P \rightarrow \lnot Q$?

0 votes
1 answer
97 views

Proof regarding n-connectedness

0 votes
1 answer
33 views

Doubt regarding the variable by which time complexity is measured

0 votes
0 answers
32 views

Proving an "inevitable intersection"

0 votes
1 answer
147 views

Arbitrary area function

0 votes
1 answer
65 views

Surjective mapping of an orientable surface into $E^5$

0 votes
0 answers
198 views

Boundary of a Möbius loop in the fundamental polygon

0 votes
1 answer
44 views

Proof regarding the genus of a topological space

-1 votes
1 answer
200 views

A distance preserving isomorphism from $R^{3}$ to $R^{2}$