Is it possible to label the edges of Kₙ with distinct integer weights so that every Hamilton cycle has the same total weight? We give a local condition characterizing the labellings that witness this question's perhaps surprising affirmative answer. More generally, we address the question that arises when "Hamilton cycle" is replaced by "k-factor" for nonnegative integers k. Such edge-labellings are in correspondence with certain vertex-labellings, and the link allows us to determine (up to a constant factor) the growth rate of the maximum edge-label in a "most efficient" injective metric trivial-TSP labelling.
@article{bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1203, author = {Scott Jones and P. Mark Kayll and Bojan Mohar and Walter D. Wallis}, title = {On constant-weight TSP-tours}, journal = {Discussiones Mathematicae Graph Theory}, volume = {23}, year = {2003}, pages = {287-307}, zbl = {1052.05063}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1203} }
Scott Jones; P. Mark Kayll; Bojan Mohar; Walter D. Wallis. On constant-weight TSP-tours. Discussiones Mathematicae Graph Theory, Tome 23 (2003) pp. 287-307. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_7151_dmgt_1203/
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