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20D60 Arithmetic and combinatorial problems (30 articles)

• Ebrahimzadeh, Behnam: A new characterization of projective special unitary group PSU$(5, q)$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 65 (2024), issue 1, pp. 1-12
• Fasolă, Georgiana; Tărnăuceanu, Marius: On a group-theoretical generalization of the Gauss formula. (English). Czechoslovak Mathematical Journal, vol. 73 (2023), issue 1, pp. 311-317
• Chandran, Arya; Thomas, Neha Elizabeth; Namboothiri, K. Vishnu: A Menon-type identity using Klee's function. (English). Czechoslovak Mathematical Journal, vol. 72 (2022), issue 1, pp. 165-176
• Chen, Ruifang; Guo, Lujun: On the conjugate type vector and the structure of a normal subgroup. (English). Czechoslovak Mathematical Journal, vol. 72 (2022), issue 1, pp. 201-207
• Sajjadi, Masoumeh: On the recognizability of some projective general linear groups by the prime graph. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 63 (2022), issue 4, pp. 443-458
• Ebrahimzadeh, Behnam; Asboei, Alireza K.: A characterization of symplectic groups related to Fermat primes. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 62 (2021), issue 1, pp. 33-40
• Gorshkov, Ilya B.; Kukharev, Andrey V.: Finite groups with prime graphs of diameter $5$. (English). Communications in Mathematics, vol. 28 (2020), issue 3, pp. 307-312
• Abedei, Mahdi; Iranmanesh, Ali; Shirjian, Farrokh: A variation of Thompson's conjecture for the symmetric groups. (English). Czechoslovak Mathematical Journal, vol. 70 (2020), issue 3, pp. 743-755
• Ebrahimzadeh, Behnam; Mohammadyari, Reza: A new characterization of Suzuki groups. (English). Archivum Mathematicum, vol. 55 (2019), issue 1, pp. 17-21
• Khademi, Maryam; Khosravi, Behrooz: Recognition of characteristically simple group $A_5\times A_5$ by character degree graph and order. (English). Czechoslovak Mathematical Journal, vol. 68 (2018), issue 4, pp. 1149-1157
• Babai, Azam; Mahmoudifar, Ali: Thompson's conjecture for the alternating group of degree $2p$ and $2p+1$. (English). Czechoslovak Mathematical Journal, vol. 67 (2017), issue 4, pp. 1049-1058
• Khalili Asboei, Alireza; Mohammadyari, Reza: Characterization of the alternating groups by their order and one conjugacy class length. (English). Czechoslovak Mathematical Journal, vol. 66 (2016), issue 1, pp. 63-70
• Khosravi, Behrooz; Khosravi, Behnam; Khosravi, Bahman; Momen, Zahra: A new characterization for the simple group ${\rm PSL}(2,p^2)$ by order and some character degrees. (English). Czechoslovak Mathematical Journal, vol. 65 (2015), issue 1, pp. 271-280
• Babai, Azam; Khosravi, Behrooz: On the composition factors of a group with the same prime graph as $B_{n}(5)$. (English). Czechoslovak Mathematical Journal, vol. 62 (2012), issue 2, pp. 469-486
• Shen, Rulin: Intersection graphs of subgroups of finite groups. (English). Czechoslovak Mathematical Journal, vol. 60 (2010), issue 4, pp. 945-950
• Shao, Changguo; Jiang, Qinhui: A new characterization of Mathieu groups. (English). Archivum Mathematicum, vol. 46 (2010), issue 1, pp. 13-23
• Khosravi, Behrooz: On the prime graphs of the automorphism groups of sporadic simple groups. (English). Archivum Mathematicum, vol. 45 (2009), issue 2, pp. 83-94
• Zhang, Liangcai; Shi, Wujie: OD-characterization of almost simple groups related to $L_{2}(49)$. (English). Archivum Mathematicum, vol. 44 (2008), issue 3, pp. 191-199
• Darafsheh, Mohammad Reza; Farjami, Yaghoub; Sadrudini, Abdollah: A characterization property of the simple group ${\rm PSL}\sb 4(5)$ by the set of its element orders. (English). Archivum Mathematicum, vol. 43 (2007), issue 1, pp. 31-37
• Ashrafi, Ali Reza; Shi, Wujie: On $7$- and $8$-decomposable finite groups. (English). Mathematica Slovaca, vol. 55 (2005), issue 3, pp. 253-262
• Schmid, Wolfgang A.: On invariants related to non-unique factorizations in block monoids and rings of algebraic integers. (English). Mathematica Slovaca, vol. 55 (2005), issue 1, pp. 21-37
• Darafsheh, M. R.; Farjami, Y.; Khademi, M.; Moghaddamfar, A. R.: Some results on the recognizability of the linear groups over the binary field. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 46 (2005), issue 4, pp. 589-600
• Drápal, Aleš: Cyclic and dihedral constructions of even order. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 44 (2003), issue 4, pp. 593-614
• Ashrafi, Ali Reza; Zhao, Yaoqing: On $5$- and $6$-decomposable finite groups. (English). Mathematica Slovaca, vol. 53 (2003), issue 4, pp. 373-383
• Iranmanesh, A.; Khosravi, B.: A characterization of $C_2(q)$ where $q>5$. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 43 (2002), issue 1, pp. 9-21
• Chin, Angelina Y. M.: Maximal sum-free sets and block designs. (English). Mathematica Slovaca, vol. 51 (2001), issue 3, pp. 295-299
• Zhukavets, Natalia: On small distances of small 2-groups. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 42 (2001), issue 2, pp. 247-257
• Kepka, Tomáš; Němec, Petr: Connected transversals -- the Zassenhaus case. (English). Commentationes Mathematicae Universitatis Carolinae, vol. 41 (2000), issue 2, pp. 299-300
• Lausch, Hans: Term functions on non-Abelian groups of order $pq$. (English). Archivum Mathematicum, vol. 18 (1982), issue 4, pp. 219-220
• Coufalová, Yvona: Polynomials over the permutation group of three elements. (English). Archivum Mathematicum, vol. 16 (1980), issue 2, pp. 67-79