New York Journal of Mathematics
Volume 18 (2012) 925-942
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D. B. McReynolds
The congruence subgroup problem for pure braid groups: Thurston's proof
We present an unpublished proof of W. Thurston that pure braid groups have the congruence subgroup property.
Partially supported by DMS-1105710.
Department of Mathematics, Purdue University, West Lafayette, IN 47906