期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (2)
The main purpose of this paper is to consider a new definition of Hom-left-symmetric bialgebra. The coboundary Hom-left-symmetric bialgebra is also st......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
It is well known that people can derive the radiation MHD model from an MHD-P1 approximate model. As pointed out by F. Xie and C. Klingenberg (2018), ......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
We give some characterizations for radial Minkowski additive operators and prove a new characterization of balls. Finally, we show the property of rad......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (2)
We give a novel upper bound on graph energy in terms of the vertex cover number, and present a complete characterization of the graphs whose energy eq......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
A subgroup H of a finite group G is said to be SS-supplemented in G if there exists a subgroup K of G such that G = HK and H boolean AND K is S-quasin......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (2)
Let r(G(1), G(2)) be the Ramsey number of the two graphs G(1) and G(2). For n(1) >= n(2) >= 1 let S (n(1), n(2)) be the double star given by V (......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
Tilting theory plays an important role in the representation theory of coalgebras. This paper seeks how to apply the theory of localization and coloca......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
We study the generalized k-connectivity kappa(k)(G) as introduced by Hager in 1985, as well as the more recently introduced generalized k-edge-connect......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
Let K be a field, and let G be a group. In the present paper, we investigate when the group ring K[G] has finite weak dimension and finite Gorenstein ......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2021; 71 (3)
Let p be an odd prime. By using the elementary methods we prove that: (1) if 2 does not divide x, p = +/- 3 (mod 8), the Diophantine equation (2(x) - ......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, ; ()
We study Hom-Lie superalgebras of Heisenberg type. For 3-dimensional Heisenberg Hom-Lie superalgebras we describe their Hom-Lie super structures, comp......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, ; ()
Let C be a triangulated category and X be a cluster tilting subcategory of C. Koenig and Zhu showed that the quotient category C/X is Gorenstein of Go......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, ; ()
In 1998, Michael Hirschhorn discovered the 5-dissection formulas of the Rogers-Ramanujan continued fraction R(q) and its reciprocal. We obtain the 5-d......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, ; ()
Let G be a finite group. If G has two rows which differ in only one entry in the character table, we call G an RD1-group. We investigate the character......
期刊： CZECHOSLOVAK MATHEMATICAL JOURNAL, 2020; 70 (4)
A ring R is called right P-injective if every homomorphism from a principal right ideal of R to R-R can be extended to a homomorphism from R-R to R-R.......
