%0 Journal Article %@ 0047-2468 %A Kurusa Árpád %A Bolyai Intézet (Matematikai Intézet) SZTE / TTIK MI [2016-], %D 2019 %F publicatio:18708 %J JOURNAL OF GEOMETRY %N 2 %P Azonosító: 39-Terjedelem: 12 p %T Ceva’s and Menelaus’ theorems in projective-metric spaces %U http://publicatio.bibl.u-szeged.hu/18708/ %V 110 %X We prove that Ceva’s and Menelaus’ theorems are valid in a projective-metric space if and only if the space is any of the elliptic geometry, the hyperbolic geometry, or the Minkowski geometries. © 2019, The Author(s). %Z Alfréd Rényi Institute of Mathematics, Hungarian Academy of Sciences, Reáltanoda u. 13-15, Budapest, 1053, Hungary Bolyai Institute, University of Szeged, Aradi vértanúk tere 1, Szeged, 6725, Hungary Export Date: 18 October 2019 Correspondence Address: Kurusa, Á.; Bolyai Institute, University of Szeged, Aradi vértanúk tere 1, Hungary; email: kurusa@math.u-szeged.hu Funding details: 20391-3/2018/FEKUSTRAT Funding details: 4322 Funding details: Nemzeti Kutatási Fejlesztési és Innovációs Hivatal, NKFI, K 116451, KH_18 129630 Funding text 1: This research was supported by NFSR of Hungary (NKFIH) under Grant numbers K 116451 and KH_18 129630, and by the Ministry of Human Capacities of Hungary grant 20391-3/2018/FEKUSTRAT. Open access funding provided by University of Szeged Open Access Fund under grant number 4322. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.