Daniel Alpay

6.0k total citations
270 papers, 2.4k citations indexed

About

Daniel Alpay is a scholar working on Applied Mathematics, Mathematical Physics and Computational Theory and Mathematics. According to data from OpenAlex, Daniel Alpay has authored 270 papers receiving a total of 2.4k indexed citations (citations by other indexed papers that have themselves been cited), including 204 papers in Applied Mathematics, 93 papers in Mathematical Physics and 67 papers in Computational Theory and Mathematics. Recurrent topics in Daniel Alpay's work include Holomorphic and Operator Theory (123 papers), Algebraic and Geometric Analysis (102 papers) and Mathematical Analysis and Transform Methods (89 papers). Daniel Alpay is often cited by papers focused on Holomorphic and Operator Theory (123 papers), Algebraic and Geometric Analysis (102 papers) and Mathematical Analysis and Transform Methods (89 papers). Daniel Alpay collaborates with scholars based in Israel, United States and Italy. Daniel Alpay's co-authors include Fabrizio Colombo, Irene Sabadini, Harry Dym, Aad Dijksma, Michael Shapiro, Israel Gohberg, Vladimir Bolotnikov, Palle E. T. Jørgensen, James Rovnyak and Hendrik de Snoo and has published in prestigious journals such as SHILAP Revista de lepidopterología, IEEE Transactions on Information Theory and Journal of Mathematical Analysis and Applications.

In The Last Decade

Daniel Alpay

249 papers receiving 2.3k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Daniel Alpay Israel 22 1.8k 776 584 328 215 270 2.4k
László Kérchy Hungary 8 1.2k 0.7× 1.0k 1.4× 414 0.7× 429 1.3× 158 0.7× 25 1.7k
Mihai Putinar United States 24 1.4k 0.8× 928 1.2× 878 1.5× 578 1.8× 113 0.5× 129 2.6k
Bernd Silbermann Germany 25 1.8k 1.0× 1.3k 1.7× 956 1.6× 398 1.2× 160 0.7× 140 2.9k
T. Andô Japan 21 1.0k 0.6× 349 0.4× 974 1.7× 261 0.8× 145 0.7× 44 1.8k
Palle E. T. Jørgensen United States 27 1.9k 1.1× 2.2k 2.8× 336 0.6× 522 1.6× 390 1.8× 257 3.1k
Jacques Faraut France 15 643 0.4× 654 0.8× 550 0.9× 347 1.1× 180 0.8× 45 1.8k
Olav Njåstad Norway 21 1.3k 0.7× 301 0.4× 982 1.7× 254 0.8× 301 1.4× 110 2.3k
Tamás Erdélyi United States 17 1.1k 0.6× 286 0.4× 313 0.5× 246 0.8× 97 0.5× 116 1.6k
Peter Rosenthal Canada 18 829 0.5× 686 0.9× 513 0.9× 672 2.0× 109 0.5× 110 1.6k
Garrett Johnson United States 3 1.1k 0.6× 710 0.9× 248 0.4× 372 1.1× 125 0.6× 5 1.7k

Countries citing papers authored by Daniel Alpay

Since Specialization
Citations

This map shows the geographic impact of Daniel Alpay'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 Daniel Alpay with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Daniel Alpay more than expected).

Fields of papers citing papers by Daniel Alpay

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Daniel Alpay. 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 Daniel Alpay. The network helps show where Daniel Alpay may publish in the future.

Co-authorship network of co-authors of Daniel Alpay

This figure shows the co-authorship network connecting the top 25 collaborators of Daniel Alpay. A scholar is included among the top collaborators of Daniel Alpay 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 Daniel Alpay. Daniel Alpay 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.
Alpay, Daniel & Izchak Lewkowicz. (2024). Quantitatively hyper-positive real rational functions II. Linear Algebra and its Applications. 697. 332–364. 1 indexed citations
2.
Alpay, Daniel, et al.. (2023). Hörmander’s $$L^2$$-Method, $${\overline{\partial }}$$-Problem and Polyanalytic Function Theory in One Complex Variable. Complex Analysis and Operator Theory. 17(3). 3 indexed citations
3.
Alpay, Daniel, et al.. (2023). Commuting operators over Pontryagin spaces with applications to system theory. Journal of Functional Analysis. 284(10). 109864–109864.
4.
Alpay, Daniel, et al.. (2022). Beurling-Lax type theorems and Cuntz relations. Virtual Community of Pathological Anatomy (University of Castilla La Mancha).
5.
Alpay, Daniel, et al.. (2021). On a Polyanalytic Approach to Noncommutative de Branges–Rovnyak Spaces and Schur Analysis. Virtual Community of Pathological Anatomy (University of Castilla La Mancha). 6 indexed citations
6.
Alpay, Daniel, et al.. (2021). On the global operator and Fueter mapping theorem for slice polyanalytic functions. Virtual Community of Pathological Anatomy (University of Castilla La Mancha). 13 indexed citations
7.
Alpay, Daniel, et al.. (2021). Infinite-order Differential Operators Acting on Entire Hyperholomorphic Functions. Virtual Community of Pathological Anatomy (University of Castilla La Mancha). 5 indexed citations
8.
Alpay, Daniel, Fabrizio Colombo, & Irene Sabadini. (2020). Realizations of holomorphic and slice hyperholomorphic functions: The Krein space case. Virtual Community of Pathological Anatomy (University of Castilla La Mancha). 2 indexed citations
9.
Alpay, Daniel, Fabrizio Colombo, Izchak Lewkowicz, & Irene Sabadini. (2020). On pseudo-spectral factorization over the complex numbers and quaternions. Virtual Community of Pathological Anatomy (University of Castilla La Mancha).
10.
Alpay, Daniel, Fabrizio Colombo, & Irene Sabadini. (2019). The Fock Space as a De Branges–Rovnyak Space. Virtual Community of Pathological Anatomy (University of Castilla La Mancha). 4 indexed citations
11.
Alpay, Daniel. (2015). An Advanced Complex Analysis Problem Book Topological Vector Spaces, Functional Analysis, and Hilbert Spaces of Analytic Functions. CERN Document Server (European Organization for Nuclear Research). 9 indexed citations
12.
Alpay, Daniel, et al.. (2015). Recent advances in inverse scattering, Schur analysis and stochastic processes : a collection of papers dedicated to Lev Sakhnovich. CERN Document Server (European Organization for Nuclear Research). 1 indexed citations
13.
Alpay, Daniel & Israel Gohberg. (2006). Interpolation, Schur Functions and Moment Problems. Birkhäuser Basel eBooks. 4 indexed citations
14.
Alpay, Daniel. (2003). Reproducing Kernel Spaces and Applications. Birkhäuser Basel eBooks. 79 indexed citations
15.
Alpay, Daniel, et al.. (2002). Interpolation Theory, Systems Theory and Related Topics. Birkhäuser Basel eBooks. 9 indexed citations
16.
Alpay, Daniel, et al.. (2002). System Theory, Operator Models and Scattering: The Time-Varying Case. Chapman University Digital Commons (Chapman University). 63(5). 5 indexed citations
17.
Alpay, Daniel & Victor Vinnikov. (2001). Operator Theory, System Theory and Related Topics. Birkhäuser Basel eBooks. 17 indexed citations
18.
Alpay, Daniel & Juliette Leblond. (1995). Loewner Interpolation in Matrix Hardy Classes. Zeitschrift für Analysis und ihre Anwendungen. 14(2). 225–233. 2 indexed citations
19.
Alpay, Daniel & Vladimir Bolotnikov. (1994). The Carathéodory-Féjer Interpolation Problem in Hardy Classes. Zeitschrift für Analysis und ihre Anwendungen. 13(4). 583–597. 2 indexed citations
20.
Alpay, Daniel & Vladimir Bolotnikov. (1993). Two-Sided Nevanlinna-Pick Interpolation for a Class of Matrix-Valued Functions. Zeitschrift für Analysis und ihre Anwendungen. 12(2). 211–238. 11 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.

Explore authors with similar magnitude of impact

Breakdown of academic impact, for papers by László Kérchy Breakdown of academic impact, for papers by Mihai Putinar Breakdown of academic impact, for papers by Bernd Silbermann Breakdown of academic impact, for papers by T. Andô Breakdown of academic impact, for papers by Palle E. T. Jørgensen Breakdown of academic impact, for papers by Jacques Faraut Breakdown of academic impact, for papers by Olav Njåstad Breakdown of academic impact, for papers by Tamás Erdélyi Breakdown of academic impact, for papers by Peter Rosenthal Breakdown of academic impact, for papers by Garrett Johnson
Rankless by CCL
2026