On repdigit polygonal numbers.
Keith, Mike (1998)
Journal of Integer Sequences [electronic only]
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Keith, Mike (1998)
Journal of Integer Sequences [electronic only]
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Stevens, Gary E. (1998)
Journal of Integer Sequences [electronic only]
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Diane M. Donovan, James G. Lefevre, Thomas A. McCourt, Nicholas J. Cavenagh (2012)
Commentationes Mathematicae Universitatis Carolinae
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We define a proper triangulation to be a dissection of an integer sided equilateral triangle into smaller, integer sided equilateral triangles such that no point is the vertex of more than three of the smaller triangles. In this paper we establish necessary and sufficient conditions for a proper triangulation of a convex region to exist. Moreover we establish precisely when at least two such equilateral triangle dissections exist. We also provide necessary and sufficient conditions for...
N. L. White (1989)
Discrete & computational geometry
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Discrete & computational geometry
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L.J. Guibas, Sharir Micha, Shmuel Sifrony (1989)
Discrete & computational geometry
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Discrete & computational geometry
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K. Kedem, M. Sharir (1990)
Discrete & computational geometry
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Ženíšek, Alexander
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