13 citations · 16 across the 8 of their papers we have counts for
8 papers
On the divisibility of H-shape trees and their spectral determination
Zhen Chen, Jianfeng Wang, Maurizio Brunetti +1
A graph is divisible by a graph if the characteristic polynomial of is divisible by that of . In this paper, a necessary and sufficient condition for recursive graph…
Inertia and spectral symmetry of eccentricity matrices of some clique trees
Xiaohong Li, Jianfeng Wang, Maurizio Brunetti
The eccentricity matrix of a connected graph is obtained from the distance matrix of by leaving unchanged the largest nonzero entries in each row and each c…
A Hoffman's Theorem: a revisit with new discovery
Jianfeng Wang, Jing Wang, Maurizio Brunetti
In 1972, A. J. Hoffman proved his celebrated theorem concerning the limit points of spectral radii of non-negative symmetric integral matrices less than . In thi…
The Hoffman program of graphs: old and new
Jianfeng Wang, Jing Wang, Maurizio Brunetti
The Hoffman program with respect to any real or complex square matrix associated to a graph stems from A. J. Hoffman's pioneering work on the limit points for the spectral…
Constructing cospectral signed graphs
Francesco Belardo, Maurizio Brunetti, Matteo Cavaleri +1
A well--known fact in Spectral Graph Theory is the existence of pairs of isospectral nonisomorphic graphs (known as PINGS). The work of A.J. Schwenk (in 1973) and of C. Godsil and…
A Note on the Algebra of Operations for Hopf Cohomology at Odd Primes
Maurizio Brunetti, Adriana Ciampella, Luciano A. Lomonaco
Let be any prime, and let be the algebra of operations on the cohomology ring of any cocommutative -Hopf algebra. In this paper we show that whe…
Searching for fractal structures in the Universal Steenrod Algebra at odd primes
Maurizio Brunetti, Adriana Ciampella
Unlike the p = 2 case, the universal Steenrod Algebra Q(p) at odd primes does not have a fractal structure that preserves the length of monomials. Nevertheless, when p is odd we de…
On a Graph Connecting Hyperbinary Expansions
M. Brunetti, A. D'Aniello
Le n be any positive integer. A hyperbinary expansion of n is are presentation of n as sum of powers of 2, each power being used at most twice. In this paper we study some properti…