Improved Spanning on Theta-5
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We show an upper bound of sin(3π/10) /sin(2π/5)-sin(3π/10) <5.70 on the spanning ratio of Θ_5-graphs, improving on the previous best known upper bound of 9.96 [Bose, Morin, van Renssen, and Verdonschot. The Theta-5-graph is a spanner. Computational Geometry, 2015.]
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