Geodetic line, middle and total graphs
Jerzy Topp (1990)
Mathematica Slovaca
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Jerzy Topp (1990)
Mathematica Slovaca
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Gliviak, Ferdinand, Kyš, P. (1997)
Acta Mathematica Universitatis Comenianae. New Series
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Juraj Bosák (1979)
Mathematica Slovaca
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R.C. Laskar, Henry Martyn Mulder (2013)
Discussiones Mathematicae Graph Theory
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A path-neighborhood graph is a connected graph in which every neighborhood induces a path. In the main results the 3-sun-free path-neighborhood graphs are characterized. The 3-sun is obtained from a 6-cycle by adding three chords between the three pairs of vertices at distance 2. A Pk-graph is a path-neighborhood graph in which every neighborhood is a Pk, where Pk is the path on k vertices. The Pk-graphs are characterized for k ≤ 4.