Inom talteori är Erdős–Straus förmodan en förmodan som säger att för alla heltal n ≥ 2 kan talet 4/n skrivas som summan av reciprokerna av tre positiva heltal. Paul Erdős och Ernst G. Straus formulerade förmodandet år 1948.
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- Den här artikeln är helt eller delvis baserad på material från engelskspråkiga Wikipedia, Erdős–Straus conjecture, 27 januari 2014.
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