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Improved upper bound for acyclic chromatic index of planar graphs without 4-cycles.
Yingqian Wang
Ping Sheng
Published in:
J. Comb. Optim. (2014)
Keyphrases
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upper bound
planar graphs
lower bound
worst case
upper and lower bounds
np hard
np complete
branch and bound
partition function
color images
graphical models
weighted graph
lower and upper bounds