Conjugation Curvature in Solvable Baumslag-Solitar Groups
Journal of Topology and Analysis(2021)
摘要
For an element in $BS(1,n) = \\langle t,a | tat^{-1} = a^n \\rangle$ written in the normal form $t^{-u}a^vt^w$ with $u,w \\geq 0$ and $v \\in \\mathbb{Z}$, we exhibit a geodesic word representing the element and give a formula for its word length with respect to the generating set $\\{t,a\\}$. Using this word length formula, we prove that there are sets of elements of positive density of positive, negative and zero conjugation curvature, as defined by Bar Natan, Duchin and Kropholler.
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关键词
Baumslag-Solitar groups, curvature, geodesics, growth
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