J. Andersen, A. Bene, and R. Penner. (2007)cite arxiv:0710.2651
Comment: 24 pages, 4 figures Theorem 3.6 has been strengthened, and Theorems
8.1 and 8.2 have been added.
A. Bene. (2010)cite arxiv:1010.5275
Comment: This survey (minus minor corrections) was written for and published
in the abstracts for the 57th Topology Symposium which took place in Okayama,
JP 2010. It summarizes the contents of a talk of the same title which
was given by the author at that conference on 8/12/2010.
N. Chandgotia, R. Peled, S. Sheffield, and M. Tassy. (2018)cite arxiv:1810.10124Comment: 21 pages, 2 Figures. Corrected Lemma 4.2 (Lemma 4.12 in the current version) from the previous version.
F. Charles. (2012)cite arxiv:1206.4002Comment: 20 pages, minor changes. Theorem 4 is stated in greater generality, but proofs don't change. Comments still welcome.
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