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Publication:4023010
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zbMath0772.05045MaRDI QIDQ4023010

Litong Xie

Publication date: 20 January 1993


Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

chromatic numberHadwiger's conjecturefour-color problem


Mathematics Subject Classification ID

Planar graphs; geometric and topological aspects of graph theory (05C10) Coloring of graphs and hypergraphs (05C15)








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