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Pseudo-Anosov elements of mapping class groups of Heegaard surfaces of the 3-sphere
2011
Kodai Mathematical Journal
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We compute the growth series and the growth functions of reducible and pseudo-Anosov elements of the pure mapping class group of the sphere with four holes with respect to a certain generating set. We prove that the ratio of the number of pseudo-Anosov elements to that of all elements in a ball with center at the identity tends to one as the radius of the ball tends to infinity.
doi:10.2996/kmj/1301576767
fatcat:ln4h2dqszvcnvl2yfyufw2l7mi