Polychromatic Number of the Plane and Results Near the Upper Bound

Alexander Soifer
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Alexander Soifer: University of Colorado at Colorado Springs, College of Letters, Arts, and Sciences

Chapter Chapter 6 in The New Mathematical Coloring Book, 2024, pp 49-55 from Springer

Abstract: Abstract In section 4, we discussed the polychromatic number χp of the plane and looked at the 1970 paper [Rai] by Dmitry E. Raiskii, in which he was the first to prove that 4 is the lower bound of χp. The paper also contained the upper bound:

Date: 2024
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DOI: 10.1007/978-1-0716-3597-1_6

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