TY - JOUR AB - The identity discovered in [1] can be viewed as a sharpening of the LYM inequality ([3], [4], [5]). It was extended in [2] so that it covers also Bollobás' inequality [6]. Here we present a further generalization and demonstrate that it shares with its predecessors the usefullness for uniqueness proofs in extremal set theory. DA - 1993 DO - 10.1007/BF01202350 LA - eng IS - 3 M2 - 241 PY - 1993 SN - 0209-9683 SP - 241-247 T2 - Combinatorica TI - A generalization of the AZ identity UR - https://nbn-resolving.org/urn:nbn:de:0070-pub-17749607 Y2 - 2024-11-22T05:11:29 ER -