Zobrazeno 1 - 10
of 453
pro vyhledávání: '"Heydari F."'
Publikováno v:
Journal of Biomedical Physics and Engineering, Vol 9, Iss 4, Pp 445-452 (2019)
Introduction: The determination of patient’s absorbed dose is the first step of radiation protection which depends on the quantification of organ activity in nuclear medicine. The aim of the present study was to determine the absorbed dose by pa
Externí odkaz:
https://doaj.org/article/4efd0ed796ca434993456515708b72e3
Publikováno v:
In Diamond & Related Materials November 2024 149
Publikováno v:
In Journal of Magnetism and Magnetic Materials 15 August 2024 604
Publikováno v:
In Physica B: Condensed Matter 15 July 2024 685
Let $\Gamma=(K_{n},H^-)$ be a signed complete graph whose negative edges induce a subgraph $H$. The index of $\Gamma$ is the largest eigenvalue of its adjacency matrix. In this paper we study the index of $\Gamma$ when $H$ is a unicyclic graph. We sh
Externí odkaz:
http://arxiv.org/abs/2102.03308
Let $G$ be a simple graph and $A(G)$ be the adjacency matrix of $G$. The matrix $S(G) = J -I -2A(G)$ is called the Seidel matrix of $G$, where $I$ is an identity matrix and $J$ is a square matrix all of whose entries are equal to 1. Clearly, if $G$ i
Externí odkaz:
http://arxiv.org/abs/1902.00747
Autor:
Heydari, F.
Let $R$ be a commutative ring and $M$ be an $R$-module, and let $I(R)^*$ be the set of all non-trivial ideals of $R$. The $M$-intersection graph of ideals of $R$, denoted by $G_M(R)$, is a graph with the vertex set $I(R)^*$, and two distinct vertices
Externí odkaz:
http://arxiv.org/abs/1702.08525
Let $G$ be a group. The prime index graph of $G$, denoted by $\Pi(G)$, is the graph whose vertex set is the set of all subgroups of $G$ and two distinct comparable vertices $H$ and $K$ are adjacent if and only if the index of $H$ in $K$ or the index
Externí odkaz:
http://arxiv.org/abs/1508.01133
Autor:
Nikmehr, M. J., Heydari, F.
This paper has been withdrawn by the author because there are some typos in proofs.
Comment: This paper has been withdrawn by the author because there are some typos in proofs
Comment: This paper has been withdrawn by the author because there are some typos in proofs
Externí odkaz:
http://arxiv.org/abs/1305.6192
Autor:
Nikmehr, M. J., Heydari, F.
Let $R$ be a commutative ring and $M$ be an $R$-module, and let $Z(M)$ be the set of all zero-divisors on $M$. In 2008, D.F. Anderson and A. Badawi introduced the regular graph of $R$. In this paper, we generalize the regular graph of $R$ to the \tex
Externí odkaz:
http://arxiv.org/abs/1305.6199