A Combinatorial Proof That Σ k³ = (Σ k)²

DOI10.2307/2688231zbMath0214.02701OpenAlexW2329205363WikidataQ29999784 ScholiaQ29999784MaRDI QIDQ5616176

R. G. Stein

Publication date: 1971

Published in: Mathematics Magazine (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2307/2688231

Mathematics Subject Classification ID

Enumerative combinatorics (05A99)

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