Report copyright - Covering map theory for graphs - Osaka City University€¦ · (Lov´asz [10] ) G ¬ å Ñ q ` |n (−1) Í w : q b } \ w q V |N(G) Un- È A1 s y |χ(G) ≥ n+3 p K } Lov´asz w g
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