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arxiv: 1509.00783 · v2 · pith:YDYIXUGSnew · submitted 2015-09-02 · 🧮 math.DS · math.CA· math.GR· math.LO

PSL(2,C), the exponential and some new free groups

classification 🧮 math.DS math.CAmath.GRmath.LO
keywords exponentialgeneratedproveresultaffinecohenconsequencesform
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We prove a normal form result for the groupoid of germs generated by PSL(2,C) and the exponential map. As consequences, we generalize a result of Cohen about the group of translations and powers, and prove that the subgroup of Homeo(R,+infinity) generated by the positive affine maps and the exponential map is isomorphic to a HNN-extension.

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