Eduardo Marques de Sá

1.1k total citations
39 papers, 766 citations indexed

About

Eduardo Marques de Sá is a scholar working on Computational Theory and Mathematics, Geometry and Topology and Electrical and Electronic Engineering. According to data from OpenAlex, Eduardo Marques de Sá has authored 39 papers receiving a total of 766 indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Computational Theory and Mathematics, 16 papers in Geometry and Topology and 14 papers in Electrical and Electronic Engineering. Recurrent topics in Eduardo Marques de Sá's work include Matrix Theory and Algorithms (21 papers), graph theory and CDMA systems (14 papers) and Advanced Topics in Algebra (10 papers). Eduardo Marques de Sá is often cited by papers focused on Matrix Theory and Algorithms (21 papers), graph theory and CDMA systems (14 papers) and Advanced Topics in Algebra (10 papers). Eduardo Marques de Sá collaborates with scholars based in Portugal, United States and Canada. Eduardo Marques de Sá's co-authors include Charles R. Johnson, Henry Wolkowicz, Robert Grone, Carlos M. da Fonseca, Rui Nunes, Yulin Zhang, Miguel Ricou and Asangla Ao and has published in prestigious journals such as SHILAP Revista de lepidopterología, Linear Algebra and its Applications and Discrete Mathematics.

In The Last Decade

Eduardo Marques de Sá

35 papers receiving 674 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Eduardo Marques de Sá Portugal 12 515 243 194 159 151 39 766
Thomas L. Markham United States 14 681 1.3× 347 1.4× 244 1.3× 142 0.9× 191 1.3× 49 802
Karla Rost Germany 13 548 1.1× 141 0.6× 121 0.6× 60 0.4× 109 0.7× 35 763
Plamen Koev United States 15 486 0.9× 135 0.6× 275 1.4× 83 0.5× 76 0.5× 28 769
Daniel Hershkowitz Israel 16 615 1.2× 253 1.0× 160 0.8× 247 1.6× 152 1.0× 76 863
Raphael Loewy Israel 18 748 1.5× 305 1.3× 196 1.0× 342 2.2× 318 2.1× 81 1.1k
I. Zaballa Spain 13 522 1.0× 165 0.7× 161 0.8× 139 0.9× 231 1.5× 68 682
Х. Д. Икрамов Russia 12 425 0.8× 118 0.5× 121 0.6× 96 0.6× 115 0.8× 165 557
Néstor Thome Spain 19 940 1.8× 212 0.9× 297 1.5× 102 0.6× 331 2.2× 79 1.0k
Hȧrald K. Wimmer Germany 17 622 1.2× 114 0.5× 310 1.6× 140 0.9× 180 1.2× 96 1.0k
Wayne Barrett United States 14 531 1.0× 190 0.8× 69 0.4× 290 1.8× 56 0.4× 54 670

Countries citing papers authored by Eduardo Marques de Sá

Since Specialization
Citations

This map shows the geographic impact of Eduardo Marques de Sá's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Eduardo Marques de Sá with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Eduardo Marques de Sá more than expected).

Fields of papers citing papers by Eduardo Marques de Sá

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Eduardo Marques de Sá. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Eduardo Marques de Sá. The network helps show where Eduardo Marques de Sá may publish in the future.

Co-authorship network of co-authors of Eduardo Marques de Sá

This figure shows the co-authorship network connecting the top 25 collaborators of Eduardo Marques de Sá. A scholar is included among the top collaborators of Eduardo Marques de Sá based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Eduardo Marques de Sá. Eduardo Marques de Sá is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Sá, Eduardo Marques de, et al.. (2024). Sonographic evaluation of the impact of umbilical cord insertion site on fetal weight. SHILAP Revista de lepidopterología. 17(3). 562–569.
2.
Ricou, Miguel, Eduardo Marques de Sá, & Rui Nunes. (2018). The Ethical Principles of the Portuguese Psychologists: An Empirical Approach. The Journal of Medicine and Philosophy A Forum for Bioethics and Philosophy of Medicine. 44(1). 109–131. 1 indexed citations
3.
Sá, Eduardo Marques de. (2017). Noncrossing partitions, noncrossing graphs, and q-permanental equations. Linear Algebra and its Applications. 541. 36–53. 2 indexed citations
4.
Ricou, Miguel, Eduardo Marques de Sá, & Rui Nunes. (2016). The Ethical Principles of the Portuguese Psychologists: A Universal Dimension. The Journal of Medicine and Philosophy A Forum for Bioethics and Philosophy of Medicine. 42(2). 199–213. 6 indexed citations
5.
Sá, Eduardo Marques de, et al.. (2012). Common mental disorders in pregnancy in the context of interpartner violence. Journal of Psychiatric and Mental Health Nursing. 20(5). 419–425. 13 indexed citations
6.
Sá, Eduardo Marques de. (2011). The inertia sets of symmetric tridiagonal sign-patterns. Linear Algebra and its Applications. 436(6). 1754–1762. 2 indexed citations
7.
Fonseca, Carlos M. da & Eduardo Marques de Sá. (2007). Fibonacci numbers, alternating parity sequences and faces of the tridiagonal Birkhoff polytope. Discrete Mathematics. 308(7). 1308–1318. 11 indexed citations
8.
Sá, Eduardo Marques de & Yulin Zhang. (2000). The number of Kronecker indices of square pencils of a special kind. Linear Algebra and its Applications. 305(1-3). 15–21. 2 indexed citations
9.
Sá, Eduardo Marques de & Yulin Zhang. (2000). Ranks of submatrices and the off-diagonal indices of a square matrix. Linear Algebra and its Applications. 305(1-3). 1–14. 1 indexed citations
10.
Sá, Eduardo Marques de, et al.. (2000). Workshop on “Geometric and combinatorial methods in the Hermitian sum spectral problem” University of Coimbra, Portugal, 15–16 July 1999. Linear Algebra and its Applications. 319(1-3). 1–2. 1 indexed citations
11.
Sá, Eduardo Marques de, et al.. (1995). Singular values and invariant factors of matrix sums and products. Linear Algebra and its Applications. 225. 43–56. 12 indexed citations
12.
Sá, Eduardo Marques de. (1994). Faces and traces of the unit ball of a symmetric gauge function. Linear Algebra and its Applications. 197-198. 349–395. 7 indexed citations
13.
Sá, Eduardo Marques de, et al.. (1992). The inertia of certain Hermitian skew-triangular block matrices. Linear Algebra and its Applications. 160. 75–85. 6 indexed citations
14.
Sá, Eduardo Marques de. (1989). The rank of the difference of similar matrices. Portugaliae Mathematica. 46(2). 177–187. 7 indexed citations
15.
Grone, Robert, Charles R. Johnson, Eduardo Marques de Sá, & Henry Wolkowicz. (1987). Normal matrices. Linear Algebra and its Applications. 87. 213–225. 66 indexed citations
16.
Grone, Robert, Charles R. Johnson, Eduardo Marques de Sá, & Henry Wolkowicz. (1986). A note on maximizing the permanent of a positive definite hermitian matrix, given the eigenvalues. Linear and Multilinear Algebra. 19(4). 389–393. 6 indexed citations
17.
Grone, Robert, Charles R. Johnson, Eduardo Marques de Sá, & Henry Wolkowicz. (1984). Positive definite completions of partial Hermitian matrices. Linear Algebra and its Applications. 58. 109–124. 337 indexed citations
18.
Sá, Eduardo Marques de. (1981). On the inertia of sums of Hermitian matrices. Linear Algebra and its Applications. 37. 143–159. 14 indexed citations
19.
Sá, Eduardo Marques de. (1981). Multiple roots of diagonal multiples of a square matrix. Discrete Mathematics. 36(3). 57–67. 1 indexed citations
20.
Sá, Eduardo Marques de. (1979). Imbedding conditions for λ-matrices. Linear Algebra and its Applications. 24. 33–50. 112 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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