TY - JOUR
T1 - Oriented discrepancy of Hamilton cycles
AU - Gishboliner, Lior
AU - Krivelevich, Michael
AU - Michaeli, Peleg
N1 - Publisher Copyright:
© 2023 The Authors. Journal of Graph Theory published by Wiley Periodicals LLC.
PY - 2023/8
Y1 - 2023/8
N2 - We propose the following extension of Dirac's theorem: if (Formula presented.) is a graph with (Formula presented.) vertices and minimum degree (Formula presented.), then in every orientation of (Formula presented.) there is a Hamilton cycle with at least (Formula presented.) edges oriented in the same direction. We prove an approximate version of this conjecture, showing that minimum degree (Formula presented.) guarantees a Hamilton cycle with at least (Formula presented.) edges oriented in the same direction. We also study the analogous problem for random graphs, showing that if the edge probability (Formula presented.) is above the Hamiltonicity threshold, then, with high probability, in every orientation of (Formula presented.) there is a Hamilton cycle with (Formula presented.) edges oriented in the same direction.
AB - We propose the following extension of Dirac's theorem: if (Formula presented.) is a graph with (Formula presented.) vertices and minimum degree (Formula presented.), then in every orientation of (Formula presented.) there is a Hamilton cycle with at least (Formula presented.) edges oriented in the same direction. We prove an approximate version of this conjecture, showing that minimum degree (Formula presented.) guarantees a Hamilton cycle with at least (Formula presented.) edges oriented in the same direction. We also study the analogous problem for random graphs, showing that if the edge probability (Formula presented.) is above the Hamiltonicity threshold, then, with high probability, in every orientation of (Formula presented.) there is a Hamilton cycle with (Formula presented.) edges oriented in the same direction.
KW - Dirac's theorem
KW - Hamilton cycle
KW - oriented discrepancy
UR - http://www.scopus.com/inward/record.url?scp=85149339867&partnerID=8YFLogxK
U2 - 10.1002/jgt.22947
DO - 10.1002/jgt.22947
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AN - SCOPUS:85149339867
SN - 0364-9024
VL - 103
SP - 780
EP - 792
JO - Journal of Graph Theory
JF - Journal of Graph Theory
IS - 4
ER -