Geodesic
Fifty years of Kurepa's $!n$ hypothesis
Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 46 (2021) no. 1.

Voir la notice de l'article provenant de la source eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

Djuro Kurepa formulated in 1971 the so called left factorial hypothesis. This hypothesis is still open, despite much efforts to solve it. Here we give some historical notes and review the current status of the hypothesis. Using probabilistic model we also estimated sums of Kurepa reminders and discussed in details finite Kurepa trees. 
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     author = {\v{Z}arko Mijajlovi\'c},
     title = {Fifty years of {Kurepa's} $!n$ hypothesis},
     journal = {Bulletin de l'Acad\'emie serbe des sciences. Classe des sciences math\'ematiques et naturelles},
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Žarko Mijajlović. Fifty years of Kurepa's $!n$ hypothesis. Bulletin de l'Académie serbe des sciences. Classe des sciences mathématiques et naturelles, Tome 46 (2021) no. 1. http://geodesic.mathdoc.fr/item/BASS_2021_46_1_a9/