Zobrazeno 1 - 10
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pro vyhledávání: '"f-index"'
Publikováno v:
The Egyptian Journal of Neurology, Psychiatry and Neurosurgery, Vol 59, Iss 1, Pp 1-5 (2023)
Abstract Background Diabetes is one of the most common causes for peripheral neuropathy which warrants early diagnosis and treatment. The conventional nerve conduction studies appear to be normal if few of the nerve roots are escaping the lesion. In
Externí odkaz:
https://doaj.org/article/9083973ea28a402fa2d91fcb43a3972c
Autor:
Sk Rabiul Islam, Madhumangal Pal
Publikováno v:
Complex & Intelligent Systems, Vol 9, Iss 2, Pp 2043-2063 (2022)
Abstract The molecular descriptors are a useful tool in the spectral graph, molecular chemistry and several fields of chemistry and mathematics. The edge F-index is proposed for fuzzy graphs (FGs) here. Bounds of this index are calculated for FGs. Th
Externí odkaz:
https://doaj.org/article/1cd7c6c1b1a54e15b41003b69d9150af
Akademický článek
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Publikováno v:
Fishes, Vol 8, Iss 10, p 503 (2023)
In order to study the community of fishery resources, five sampling sections were set up in the lower Yellow River from 2019 to 2022 to investigate the diversity of fishery resources. A total of 54 fish species were identified in the survey, belongin
Externí odkaz:
https://doaj.org/article/4ce70fc8c9be42e0a6e1be93714a6dd7
Publikováno v:
Open Mathematics, Vol 18, Iss 1, Pp 150-161 (2020)
The F-index F(G) of a graph G is obtained by the sum of cubes of the degrees of all the vertices in G. It is defined in the same paper of 1972 where the first and second Zagreb indices are introduced to study the structure-dependency of total π-elec
Externí odkaz:
https://doaj.org/article/4c0e1871a4a443a6a311adebcdb7feee
Publikováno v:
AKCE International Journal of Graphs and Combinatorics, Vol 17, Iss 1, Pp 25-37 (2020)
For a molecular graph, the first Zagreb index of a graph is equal to the sum of squares of the vertex degrees of the graph and the forgotten topological index (F-index) of a graph is defined as the sum of cubes of the vertex degrees of the graph. The
Externí odkaz:
https://doaj.org/article/6f079d1a918f4b3185297660204a8ac1
Autor:
Hamideh Aram, Nasrin Dehgardi
Publikováno v:
Communications in Combinatorics and Optimization, Vol 2, Iss 2, Pp 87-98 (2017)
The first general Zagreb index is defined as $M_1^\lambda(G)=\sum_{v\in V(G)}d_{G}(v)^\lambda$ where $\lambda\in \mathbb{R}-\{0,1\}$. The case $\lambda=3$, is called F-index. Similarly, reformulated first general Zagreb index
Externí odkaz:
https://doaj.org/article/eec169ed101946629a7c34c75d13b92d
Autor:
Nilanjan De
Publikováno v:
Indonesian Journal of Combinatorics, Vol 2, Iss 2, Pp 97-110 (2018)
The F-index of a graph is defined as the sum of cubes of the vertex degrees of the graph which was introduced in 1972, in the same paper where the first and second Zagreb indices were introduced. In this paper we study the F-index of four operations
Externí odkaz:
https://doaj.org/article/e43dda1255a2484a8f3a8ea7adb55cd2
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