On the packing chromatic number of Cartesian products,hexagonal lattice,and trees |
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| Affiliation: | 1. School of Mathematics, Liaocheng University, Liaocheng 252000, China;2. School of Computer Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China;3. Department of Radiology and BRIC, University of North Carolina at Chapel Hill, NC 27599, USA;4. Department of Brain and Cognitive Engineering, Korea University, Seoul 02841, Republic of Korea;1. Faculty of Science and Technology of Mohammaedia BP 146 Mohammedia 20650, Morocco;2. National School of Applied Sciences of Tetouan, BP 2222 M’hannech , Tetouan, Morocco;3. Higher School of Technology EST Berrechid, Hassan 1st University, Morocco;4. University Grenoble Alpes, CNRS, LIG/MRIM France |
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