【摘 要】
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We consider a variation of a classical Turán-type extremal problem as follows: Determine the smallest even integer σ(Kr,r, n) such that every n-term graph
【机 构】
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DepartmentofMathematics
【基金项目】
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This work was supported by the National Natural Science Foundation of China (Grant No.19971086).
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We consider a variation of a classical Turán-type extremal problem as follows: Determine the smallest even integer σ(Kr,r, n) such that every n-term graphic sequence π = (d1, d2,..., dn) with term sum σ(π) = d1 + d2 +…+ dn ≥σ(Kr,r, n) is potentially
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［1］Calderón, A. P., Zygmund, A., On singular integrals, Amer. J. Math., 1956, 78: 89-309.［2］Fefferman, R., A note on singular integrals, Proc. Amer. Math. Soc.
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