L(2,1)-labelings of the local-edge-path-replacements of Cartesian products(Cartesian积的局部边-路替换图的L (2，1)-标号) Tekijä DUJuan(杜娟), LYUDamei(吕大梅), ZHANGKe(张科)

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图的Nordhaus-Ghaddumm型的代数连通度的界(A sharp lower bound for the algebraic connectivity of the Nordhaus- Gaddumm type) Tekijä LÜDa-mei,(吕大梅), DUJuan,(杜娟), LÜJia-jun(吕嘉钧)

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