= A primer on mapping class groups (Version 5.0) by Benson Farb and Dan Margalit
{c}
{tag=Work by Benson Farb}
{tag=Work by Dan Margalit}
{title2=Version 5.0, January 2011 preface}
By <Benson Farb> and <Dan Margalit>. The inspected primary text identifies itself as Version5.0; the preface is dated January2011, rather than a publication date inferred for another edition. Institutional copy: https://pagine.dm.unipi.it/~a019210/Farb%20Magalit_Primer%20on%20Teichmuller%20theory.pdf
§3.1 defines supported annular Dehn twists; Proposition3.2 in §3.2, printed pages72–73, proves the exact intersection formula for every integer power. §2.3 treats the Alexander method and its filling hypotheses.
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