A note on the spectra of tridiagonal matrices. - Carlos M. da Fonseca; J. Petronilho (Int. J. Math. Math. Sci., 2004)

Explicit inverse of a tridiagonal k-Toeplitz matrix. - Carlos M. da Fonseca; J. Petronilho (Numerische Mathematik, 2005)

Interlacing Properties for Hermitian Matrices Whose Graph is a Given Tree. - Carlos M. da Fonseca (SIAM J. Matrix Anal. Appl., 2005)

On the location of the eigenvalues of Jacobi matrices. - Carlos M. da Fonseca (Appl. Math. Lett., 2006)

Fibonacci numbers, alternating parity sequences and faces of the tridiagonal Birkhoff polytope. - Carlos M. da Fonseca; E. Marques De Sá (Discret. Math., 2008)

On the spectra of certain directed paths. - Carlos M. da Fonseca; J. J. P. Veerman (Appl. Math. Lett., 2009)

On (0, 1)-matrices with prescribed row and column sum vectors. - Carlos M. da Fonseca; Ricardo Mamede (Discret. Math., 2009)

The γ-Spectrum of a Graph. - Carlos M. da Fonseca; Varaporn Saenpholphat; Ping Zhang 004 (Ars Comb., 2011)

Connected graphs of fixed order and size with maximal Q-index: Some spectral bounds. - Milica Andelic; Carlos M. da Fonseca; Slobodan K. Simic; Dejan V. Tosic (Discret. Appl. Math., 2012)

The eigenvalues of a family of persymmetric anti-tridiagonal 2-Hankel matrices. - Mehmet Akbulak; Carlos M. da Fonseca; Fatih Yilmaz (Appl. Math. Comput., 2013)

The eigenpairs of a Sylvester-Kac type matrix associated with a simple model for one-dimensional deposition and evaporation. - Carlos M. da Fonseca; Dan A. Mazilu; Irina Mazilu; H. Thomas Williams (Appl. Math. Lett., 2013)

Sharp spectral inequalities for connected bipartite graphs with maximal Q-index. - Milica Andelic; Carlos M. da Fonseca; Tamara Koledin; Zoran Stanic (Ars Math. Contemp., 2013)

Unordered multiplicity lists of wide double paths. - Aleksandra Eric; Carlos M. da Fonseca (Ars Math. Contemp., 2013)

The maximum number of P-vertices of some nonsingular double star matrices. - Aleksandra Eric; Carlos M. da Fonseca (Discret. Math., 2013)

On the Largest Size of an Antichain in the Bruhat Order for A(2k, k). - Alessandro Conflitti; Carlos M. da Fonseca; Ricardo Mamede (Order, 2013)

A Practical Experience on the Impact of Plugins in Web Security. - Jose Carlos Coelho Martins da Fonseca; Marco Paulo Amorim Vieira (SRDS, 2014)

Unifying some Pell and Fibonacci identities. - Carlos M. da Fonseca (Appl. Math. Comput., 2014)

Advances in Matrices, Finite and Infinite, with Applications 2014. - P. N. Shivakumar; Panayiotis J. Psarrakos; K. C. Sivakumar; Yang Zhang; Carlos M. da Fonseca (J. Appl. Math., 2014)

Eigenvalues of a certain class of tridiagonal matrices: A brief comment. - Carlos M. da Fonseca (Appl. Math. Comput., 2015)

A multi-temperature kinetic Ising model and the eigenvalues of some perturbed Jacobi matrices. - Carlos M. da Fonseca; Saïd Kouachi; Dan A. Mazilu; Irina Mazilu (Appl. Math. Comput., 2015)

Some comments on k-tridiagonal matrices: Determinant, spectra, and inversion. - Carlos M. da Fonseca; Fatih Yilmaz (Appl. Math. Comput., 2015)

On structural properties of trees with minimal atom-bond connectivity index III: Trees with pendent paths of length three. - Darko Dimitrov; Zhibin Du; Carlos M. da Fonseca (Appl. Math. Comput., 2016)

On a family of trees with minimal atom-bond connectivity index. - Zhibin Du; Carlos M. da Fonseca (Discret. Appl. Math., 2016)

Forbidden branches in trees with minimal atom-bond connectivity index. - Darko Dimitrov; Zhibin Du; Carlos M. da Fonseca (CoRR, 2017)

Some forbidden combinations of branches in minimal-ABC trees. - Darko Dimitrov; Zhibin Du; Carlos M. da Fonseca (Discret. Appl. Math., 2018)

The number of P-vertices for acyclic matrices of maximum nullity. - Zhibin Du; Carlos M. da Fonseca (Discret. Appl. Math., 2019)

On the continuity of the maximum size of P-sets of acyclic matrices. - Zhibin Du; Carlos M. da Fonseca (Discret. Math., 2019)

The number of P-vertices of singular acyclic matrices: An inverse problem. - Carlos M. da Fonseca; Zhibin Du (Discuss. Math. Graph Theory, 2020)

The Number of Tournaments with the Minimum Number of Upsets. - Ilhan Hacioglu; Nuri Sendil; Burak Kurkcu; Carlos M. da Fonseca (Graphs Comb., 2020)

Comments on the spectrum of a tridiagonal k-Toeplitz matrix. - Carlos M. da Fonseca (J. Comput. Appl. Math., 2020)

Eigenpairs of some particular band Toeplitz matrices: A comment. - Carlos M. da Fonseca (Numer. Linear Algebra Appl., 2020)

New strong divisibility sequences. - Zhibin Du; Darko Dimitrov; Carlos M. da Fonseca (Ars Math. Contemp., 2022)

An extended eigenvalue-free interval for the eccentricity matrix of threshold graphs. - Milica Andelic; Carlos M. da Fonseca; Tamara Koledin; Zoran Stanic (J. Appl. Math. Comput., 2023)

The number of P-vertices for acyclic matrices with given nullity. - Zhibin Du; Carlos M. da Fonseca (Discret. Math., 2023)

On Chebyshev polynomials and the inertia of certain tridiagonal matrices. - Kenier Castillo; Carlos M. da Fonseca; J. Petronilho (Appl. Math. Comput., 2024)

The real symmetric matrices with a given rank and a P-set with maximum size. - Zhibin Du; Carlos M. da Fonseca (Discret. Math., 2025)

A note on the eigenvalues of a Sylvester-Kac type matrix with off-diagonal biperiodic perturbations. - Zhibin Du; Carlos M. da Fonseca (J. Comput. Appl. Math., 2025)

General Sylvester-Kac matrices with plain eigenvalues. - Zhibin Du; Carlos M. da Fonseca (Comput. Appl. Math., 2025)

An equitable partition based construction of graphs with the same spectral radius. - Milica Andelic; Carlos M. da Fonseca; Zoran Stanic (Appl. Math. Comput., 2026)

A comment on the spectrum of a four-parameter extension of the Sylvester-Kac matrix. - Carlos M. da Fonseca (J. Comput. Appl. Math., 2026)