Carlos M. da Fonseca

43 papers Journal 43
YearRankTypeTitle / Venue / Authors
2026 J jnl
A comment on the spectrum of a four-parameter extension of the Sylvester-Kac matrix.
J. Comput. Appl. Math.
Carlos M. da Fonseca
2026 J jnl
An equitable partition based construction of graphs with the same spectral radius.
Appl. Math. Comput.
Milica Andelic, Carlos M. da Fonseca, Zoran Stanic
2025 J jnl
A note on the eigenvalues of a Sylvester-Kac type matrix with off-diagonal biperiodic perturbations.
J. Comput. Appl. Math.
Zhibin Du, Carlos M. da Fonseca
2025 J jnl
General Sylvester-Kac matrices with plain eigenvalues.
Comput. Appl. Math.
Zhibin Du, Carlos M. da Fonseca
2025 J jnl
Generalised Leonardo numbers.
Log. J. IGPL
Carlos M. da Fonseca, Can Kizilates, Paulo Saraiva, Anthony G. Shannon
2025 J jnl
The determinant and a factorization of a Toeplitz matrix with some type of Horadam numbers entries.
Log. J. IGPL
Carlos M. da Fonseca, Can Kizilates, Nazlihan Terzioglu
2025 J jnl
The determinants and the inverses of the $\left ( \frac{2a }{k^{2}+2},a,a\right ) $-$L_{k}$-Toeplitz and the $(2,k^{2}+2,k^{2}+2)$-$ F_{k} $-Toeplitz matrices.
Log. J. IGPL
Carlos M. da Fonseca, Can Kizilates, Nazlihan Terzioglu
2025 J jnl
The real symmetric matrices with a given rank and a P-set with maximum size.
Discret. Math.
Zhibin Du, Carlos M. da Fonseca
2025 J jnl
r-min and r-max matrices with harmonic higher order Gauss Fibonacci numbers entries.
J. Appl. Math. Comput.
Milica Andelic, Carlos M. da Fonseca, Can Kizilates, Nazlihan Terzioglu
2024 J jnl
On Chebyshev polynomials and the inertia of certain tridiagonal matrices.
Appl. Math. Comput.
Kenier Castillo, Carlos M. da Fonseca, J. Petronilho
2023 J jnl
An extended eigenvalue-free interval for the eccentricity matrix of threshold graphs.
J. Appl. Math. Comput.
Milica Andelic, Carlos M. da Fonseca, Tamara Koledin, Zoran Stanic
2023 J jnl
The number of P-vertices for acyclic matrices with given nullity.
Discret. Math.
Zhibin Du, Carlos M. da Fonseca
2022 J jnl
New strong divisibility sequences.
Ars Math. Contemp.
Zhibin Du, Darko Dimitrov, Carlos M. da Fonseca
2020 J jnl
Comments on the spectrum of a tridiagonal k-Toeplitz matrix.
J. Comput. Appl. Math.
Carlos M. da Fonseca
2020 J jnl
Eigenpairs of some particular band Toeplitz matrices: A comment.
Numer. Linear Algebra Appl.
Carlos M. da Fonseca
2020 J jnl
The Number of Tournaments with the Minimum Number of Upsets.
Graphs Comb.
Ilhan Hacioglu, Nuri Sendil, Burak Kurkcu, Carlos M. da Fonseca
2020 J jnl
The number of P-vertices of singular acyclic matrices: An inverse problem.
Discuss. Math. Graph Theory
Carlos M. da Fonseca, Zhibin Du
2019 J jnl
On the continuity of the maximum size of P-sets of acyclic matrices.
Discret. Math.
Zhibin Du, Carlos M. da Fonseca
2019 J jnl
The number of P-vertices for acyclic matrices of maximum nullity.
Discret. Appl. Math.
Zhibin Du, Carlos M. da Fonseca
2018 J jnl
Some forbidden combinations of branches in minimal-ABC trees.
Discret. Appl. Math.
Darko Dimitrov, Zhibin Du, Carlos M. da Fonseca
2017 J jnl
Forbidden branches in trees with minimal atom-bond connectivity index.
CoRR
Darko Dimitrov, Zhibin Du, Carlos M. da Fonseca
2016 J jnl
On a family of trees with minimal atom-bond connectivity index.
Discret. Appl. Math.
Zhibin Du, Carlos M. da Fonseca
2016 J jnl
On structural properties of trees with minimal atom-bond connectivity index III: Trees with pendent paths of length three.
Appl. Math. Comput.
Darko Dimitrov, Zhibin Du, Carlos M. da Fonseca
2015 J jnl
A multi-temperature kinetic Ising model and the eigenvalues of some perturbed Jacobi matrices.
Appl. Math. Comput.
Carlos M. da Fonseca, Saïd Kouachi, Dan A. Mazilu, Irina Mazilu
2015 J jnl
Eigenvalues of a certain class of tridiagonal matrices: A brief comment.
Appl. Math. Comput.
Carlos M. da Fonseca
2015 J jnl
Some comments on k-tridiagonal matrices: Determinant, spectra, and inversion.
Appl. Math. Comput.
Carlos M. da Fonseca, Fatih Yilmaz
2014 J jnl
Advances in Matrices, Finite and Infinite, with Applications 2014.
J. Appl. Math.
P. N. Shivakumar, Panayiotis J. Psarrakos, K. C. Sivakumar, Yang Zhang, Carlos M. da Fonseca
2014 J jnl
Unifying some Pell and Fibonacci identities.
Appl. Math. Comput.
Carlos M. da Fonseca
2013 J jnl
On the Largest Size of an Antichain in the Bruhat Order for
Order
Alessandro Conflitti, Carlos M. da Fonseca, Ricardo Mamede
2013 J jnl
Sharp spectral inequalities for connected bipartite graphs with maximal Q-index.
Ars Math. Contemp.
Milica Andelic, Carlos M. da Fonseca, Tamara Koledin, Zoran Stanic
2013 J jnl
The eigenpairs of a Sylvester-Kac type matrix associated with a simple model for one-dimensional deposition and evaporation.
Appl. Math. Lett.
Carlos M. da Fonseca, Dan A. Mazilu, Irina Mazilu, H. Thomas Williams
2013 J jnl
The eigenvalues of a family of persymmetric anti-tridiagonal 2-Hankel matrices.
Appl. Math. Comput.
Mehmet Akbulak, Carlos M. da Fonseca, Fatih Yilmaz
2013 J jnl
The maximum number of P-vertices of some nonsingular double star matrices.
Discret. Math.
Aleksandra Eric, Carlos M. da Fonseca
2013 J jnl
Unordered multiplicity lists of wide double paths.
Ars Math. Contemp.
Aleksandra Eric, Carlos M. da Fonseca
2012 J jnl
Connected graphs of fixed order and size with maximal Q-index: Some spectral bounds.
Discret. Appl. Math.
Milica Andelic, Carlos M. da Fonseca, Slobodan K. Simic, Dejan V. Tosic
2011 J jnl
The γ-Spectrum of a Graph.
Ars Comb.
Carlos M. da Fonseca, Varaporn Saenpholphat, Ping Zhang
2009 J jnl
On (0, 1)-matrices with prescribed row and column sum vectors.
Discret. Math.
Carlos M. da Fonseca, Ricardo Mamede
2009 J jnl
On the spectra of certain directed paths.
Appl. Math. Lett.
Carlos M. da Fonseca, J. J. P. Veerman
2008 J jnl
Fibonacci numbers, alternating parity sequences and faces of the tridiagonal Birkhoff polytope.
Discret. Math.
Carlos M. da Fonseca, E. Marques De Sá
2006 J jnl
On the location of the eigenvalues of Jacobi matrices.
Appl. Math. Lett.
Carlos M. da Fonseca
2005 J jnl
Explicit inverse of a tridiagonal
Numerische Mathematik
Carlos M. da Fonseca, J. Petronilho
2005 J jnl
Interlacing Properties for Hermitian Matrices Whose Graph is a Given Tree.
SIAM J. Matrix Anal. Appl.
Carlos M. da Fonseca
2004 J jnl
A note on the spectra of tridiagonal matrices.
Int. J. Math. Math. Sci.
Carlos M. da Fonseca, J. Petronilho