## Zentralblatt MATH

Publications of (and about) Paul Erdös

Zbl.No:  214.30602
Autor:  Erdös, Paul
Title:  Some extremal problems in combinatorial number theory (In English)
Source:  Math. Essays dedicated to A.J. Macintyre 123-133 (1970).
Review:  [For the entire collection see Zbl 205.08601.]
The author proves that one can find a sequence of integers a1 < ... < ak \leq x, k > cx so that no four a's have pairwise the same least common multiple. The author could not decide whether the result remains true for three a's. Several related problems are discussed.
Classif.:  * 11N25 Distribution of integers with specified multiplicative constraints
Citations:  Zbl 205.08601(EA)

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