Zobrazeno 1 - 10
of 6 327
pro vyhledávání: '"Spier, A"'
Autor:
Coutinho, Gabriel, Spier, Thomás Jung
In this short paper we prove that the sum of the squares of negative (or positive) eigenvalues of the adjacency matrix of a graph is lower bounded by the sum of the degrees divided by the vector chromatic number, resolving a conjecture by Wocjan, Elp
Externí odkaz:
http://arxiv.org/abs/2308.04475
We prove that the only trees that admit perfect state transfer according to the adjacency matrix model are $P_2$ and $P_3$. This answers a question first asked by Godsil in 2012 and proves a conjecture by Coutinho and Liu from 2015.
Externí odkaz:
http://arxiv.org/abs/2305.10199
The main result of this paper states that in a rooted product of a path with rooted graphs which are disposed in a somewhat mirror-symmetric fashion, there are distinct eigenvalues supported in the end vertices of the path which are too close to each
Externí odkaz:
http://arxiv.org/abs/2305.09406
Autor:
Troy E. Spier
Publikováno v:
Lenguaje, Vol 52, Iss 02 (2024)
The relationship between Latin America and the so-called ‘Muslim World’ is a tenuous one, as public perceptions of Muslims are generally quite negative despite consistent, typically economically beneficial historical and contemporary immigration
Externí odkaz:
https://doaj.org/article/4bd1e0129cdc40d39adebc66a7751a28
Autor:
Coutinho, Gabriel, Baptista, Pedro Ferreira, Godsil, Chris, Spier, Thomás Jung, Werner, Reinhard
The adjacency matrix of a graph G is the Hamiltonian for a continuous-time quantum walk on the vertices of G. Although the entries of the adjacency matrix are integers, its eigenvalues are generally irrational and, because of this, the behaviour of t
Externí odkaz:
http://arxiv.org/abs/2208.08971
We prove that no tree contains a set of three vertices which are pairwise strongly cospectral. This answers a question raised by Godsil and Smith in 2017.
Comment: 13 pages
Comment: 13 pages
Externí odkaz:
http://arxiv.org/abs/2206.02995
Autor:
Vogel, Julia Moore, Pollack, Beth, Spier, Ezra, McCorkell, Lisa, Jaudon, Toni Wall, Fitzgerald, Megan, Davis, Hannah, Cohen, Alison K.
Publikováno v:
In Life Sciences 15 October 2024 355
Publikováno v:
In Journal of Combinatorial Theory, Series B September 2024 168:68-85
Autor:
Mariann Unhjem Wiik, Mia Negline, Vidar Beisvåg, Matthew Clapham, Elizabeth Holliday, Nuria Dueñas, Joan Brunet, Marta Pineda, Nuria Bonifaci, Stefan Aretz, Hannah Klinkhammer, Isabel Spier, Claudia Perne, Andreas Mayr, Laura Valle, Jan Lubinski, Wenche Sjursen, Rodney J. Scott, Bente A. Talseth-Palmer
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract Lynch syndrome (LS) is characterised by an increased risk of developing colorectal cancer (CRC) and other extracolonic epithelial cancers. It is caused by pathogenic germline variants in DNA mismatch repair (MMR) genes or the EPCAM gene, lea
Externí odkaz:
https://doaj.org/article/3bbca34d382145c49f58eee7da4ddbdf
Autor:
Spier, Daniel Westerman, Prieto-Araujo, Eduardo, Gomis-Bellmunt, Oriol, Mestre, Joaquim López
In this paper, a mathematical expression to define the maximum and minimum voltage ripples of the modular multilevel converter (MMC) sub-module (SM) capacitors is proposed. Using the arm averaged model of the MMC, the instantaneous power for the uppe
Externí odkaz:
http://arxiv.org/abs/2109.00310