Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Mohammad Farrokhi Derakhshandeh Ghouchan"'
Publikováno v:
Le Matematiche, Vol 69, Iss 2, Pp 183-191 (2014)
We will classify all finite simple graphs whose 2-distance graph have large or small maximum valency, specially when it is a path or a cycle.
Externí odkaz:
https://doaj.org/article/8404347ed52d4d3ca6c5baec6c04704a
Publikováno v:
International Journal of Group Theory, Vol 2, Iss 4, Pp 31-38 (2013)
Let $G$ be a finite group and $d_2(G)$ denotes the probabilitythat $[x,y,y]=1$ for randomly chosen elements $x,y$ of $G$. Wewill obtain lower and upper bounds for $d_2(G)$ in the case wherethe sets $E_G(x)={yin G:[y,x,x]=1}$ are sub
Externí odkaz:
https://doaj.org/article/a448a014bd554988b63e0830e3482036
Publikováno v:
International Journal of Group Theory, Vol 2, Iss 2, Pp 1-8 (2013)
The number of factorizations of a finite abelian group as the product of two subgroups is computed in two different ways and a combinatorial identity involving Gaussian binomial coefficients is presented.
Externí odkaz:
https://doaj.org/article/7865ac572bad4d3b8c19e4c33b1eb67b
Autor:
Hamid Reza Maimani, Mohammad Farrokhi Derakhshandeh Ghouchan, Farhad Rahimi Mahid, Ebrahim Ghorbani
Publikováno v:
Ars Mathematica Contemporanea. 20:171-186
This paper deals with some of the algebraic properties of Sierpinski graphs and a family of regular generalized Sierpinski graphs. For the family of regular generalized Sierpinski graphs, we obtain their spectrum and characterize those graphs that ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16a64b146b20534148fdbb5e83d0dccc
https://doi.org/10.26493/1855-3974.2199.97e
https://doi.org/10.26493/1855-3974.2199.97e
We classify all finite groups with five relative commutativity degrees. Also, we give a partial answer to our previous conjecture on a lower bound of the number of relative commutativity degrees of finite groups.
14 pages
14 pages
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a27865b6448eb748f3464edfeffce0a3
http://arxiv.org/abs/1912.04550
http://arxiv.org/abs/1912.04550
Publikováno v:
Communications in Algebra. 46:1259-1266
Two elements x and y of a group G satisfy the deficient square property on 2-subsets if |{x,y}2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::917b973a0d647bebacbb1dec886f9e51
https://doi.org/10.1080/00927872.2017.1344684
https://doi.org/10.1080/00927872.2017.1344684
Publikováno v:
Quaestiones Mathematicae. 40:973-979
The order of subgroups with large relative commutativity degrees are determined. Also a relationship between the number of relative commutativity degrees of a group and the length of its subgroup chains is obtained.Mathematics Subject Classication (2
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39318ddeb01321f39dc453bb8722c457
https://doi.org/10.2989/16073606.2017.1337053
https://doi.org/10.2989/16073606.2017.1337053
Publikováno v:
Communications in Algebra. 45:2867-2874
We will characterize all finite dimensional Lie algebras with at most |F|2+|F|+2 centralizers, where F is the underlying field of Lie algebras under consideration.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88e740259f5d674e9a82e8d4f85df2b8
https://doi.org/10.1080/00927872.2016.1233225
https://doi.org/10.1080/00927872.2016.1233225
Publikováno v:
Ricerche di Matematica. 65:15-20
We show that a finite group satisfying the law $$[y,_nx]=[x,_ny]$$ ( $$n>1$$ ) is nilpotent and utilizing the results of Macdonalds on the structure of groups satisfying the law $$[y,x]=[x,y]$$ , we investigate groups satisfying both of the laws $$[y
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f3554f0a6659ba163bd594d8b06ddcbc
https://doi.org/10.1007/s11587-015-0239-7
https://doi.org/10.1007/s11587-015-0239-7
Publikováno v:
Bulletin of the Australian Mathematical Society. 92:390-396
If the centre of a group $G$ is trivial, then so is the centre of its automorphism group. We study the structure of the centre of the automorphism group of a group $G$ when the centre of $G$ is a cyclic group. In particular, it is shown that the expo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ad4bde80f41fb59d92f61a148a2b885
https://doi.org/10.1017/s0004972715000489
https://doi.org/10.1017/s0004972715000489