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visits | member for | 4 years, 9 months |
seen | 12 hours ago | |
stats | profile views | 2,410 |
Aug 20 |
revised |
Classification of tangles?
fix typos |
Aug 17 |
revised |
Classification of tangles?
added remark about Dehn twist equivalence between pared tangles. |
Aug 16 |
revised |
Classification of tangles?
added question |
Aug 16 |
answered | Classification of tangles? |
Aug 9 |
reviewed | Approve suggested edit on Positive operators - norm equality |
Aug 5 |
revised |
Computable link invariants
Reread the question and realized it might be asking something else... |
Aug 5 |
comment |
Computable link invariants
Rereading your question, I realize that there are two possible versions. I'll add that to the answer. |
Aug 5 |
answered | Computable link invariants |
Aug 2 |
comment |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
Yes, I believe this is correct. |
Jul 27 |
reviewed | Approve suggested edit on How do I show that a separable isogeny is central? |
Jul 27 |
answered | Reference for the result that the systol map from Teichmuller space to curve complex is coarsely Lipschitz |
Jul 27 |
comment |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
The subtle point is indeed subtle: when I said "The (re-)gluing is the desired homeomorphism." I left out a framing issue. The re-gluing is determined up to isotopy. We have to also compute how many times to Dehn twist about the boundary. This information is recorded in the meridional curves on $\partial N(B)$ -- the boundary of a regular neighborhood of the binding. |
Jul 26 |
comment |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
Yes - that is right. However you should probably write $\Sigma_\theta$, not $\Sigma_\pi$. |
Jul 26 |
revised |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
typo |
Jul 26 |
comment |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
If you are given the bundle and the projection map, then cut the bundle along a fiber. The (re-)gluing (to recover the bundle from $\Sigma \times I$) is the desired homeomorphism. |
Jul 26 |
revised |
Going Back-and-Forth Between Different Expressions/“Representations” for Open Books.
Answering the rest of part three. |
Jul 26 |
answered | Going Back-and-Forth Between Different Expressions/“Representations” for Open Books. |
Jul 24 |
comment |
Max flow, min cut on manifolds
Thurston made some cryptic remarks along these lines at his 60th birthday conference, and in the same sentence referred to a preprint with Claire Mathieu, titled "Rotation distance between binary trees: hyperbolic geometry vs. max-flow min-cut". Amazingly this is referred to exactly once online: theory.stanford.edu/~aflb/1992-93.html -- perhaps contacting Prof Mathieu is the right course of action. |
Jul 19 |
revised |
A question about Dehn surgery and Brieskorn homology 3-spheres
typo - also added result of computer search. |
Jul 19 |
comment |
A question about Dehn surgery and Brieskorn homology 3-spheres
Oops! Obviously the form I gave above is cubic, not quadratic. |