Douglas N. Clark

1.0k total citations
29 papers, 569 citations indexed

About

Douglas N. Clark is a scholar working on Applied Mathematics, Mathematical Physics and Algebra and Number Theory. According to data from OpenAlex, Douglas N. Clark has authored 29 papers receiving a total of 569 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Applied Mathematics, 15 papers in Mathematical Physics and 10 papers in Algebra and Number Theory. Recurrent topics in Douglas N. Clark's work include Holomorphic and Operator Theory (18 papers), Advanced Topics in Algebra (9 papers) and Matrix Theory and Algorithms (9 papers). Douglas N. Clark is often cited by papers focused on Holomorphic and Operator Theory (18 papers), Advanced Topics in Algebra (9 papers) and Matrix Theory and Algorithms (9 papers). Douglas N. Clark collaborates with scholars based in United States. Douglas N. Clark's co-authors include Patrick Ahern, Om P. Agrawal, Ronald G. Douglas, Gadadhar Misra, Jon Carlson and Ciprian Foiaş and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Transactions of the American Mathematical Society and Journal of Functional Analysis.

In The Last Decade

Douglas N. Clark

24 papers receiving 383 citations

Peers

Douglas N. Clark
Takahiko Nakazi Japan
Leon Brown United States
Joel D. Pincus United States
Constantin Apostol United States
Frank Forelli United States
Warren R. Wogen United States
John W. Bunce United States
Edgar Lee Stout United States
Mary R. Embry United States
Maynard G. Arsove United States
Takahiko Nakazi Japan
Douglas N. Clark
Citations per year, relative to Douglas N. Clark Douglas N. Clark (= 1×) peers Takahiko Nakazi

Countries citing papers authored by Douglas N. Clark

Since Specialization
Citations

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

Fields of papers citing papers by Douglas N. Clark

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Douglas N. Clark. 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 Douglas N. Clark. The network helps show where Douglas N. Clark may publish in the future.

Co-authorship network of co-authors of Douglas N. Clark

This figure shows the co-authorship network connecting the top 25 collaborators of Douglas N. Clark. A scholar is included among the top collaborators of Douglas N. Clark 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 Douglas N. Clark. Douglas N. Clark 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.
Carlson, Jon & Douglas N. Clark. (1997). Projectivity and extensions of Hilbert modules over $\bold A(\bold D^N)$.. The Michigan Mathematical Journal. 44(2). 7 indexed citations
2.
Clark, Douglas N.. (1997). Projectivity and lifting of Hilbert module maps. Annales Polonici Mathematici. 66. 43–48. 2 indexed citations
3.
Carlson, Jon, et al.. (1997). Projective Hilbert A(D)-Modules. 10 indexed citations
4.
Carlson, Jon & Douglas N. Clark. (1995). Cohomology and Extensions of Hilbert Modules. Journal of Functional Analysis. 128(2). 278–306. 12 indexed citations
5.
Clark, Douglas N.. (1988). Restrictions of H p Functions in the Polydisk. American Journal of Mathematics. 110(6). 1119–1119. 19 indexed citations
6.
Clark, Douglas N.. (1980). On a similarity theory for rational Toeplitz operators.. Journal für die reine und angewandte Mathematik (Crelles Journal). 1980(320). 6–31. 2 indexed citations
7.
Clark, Douglas N., et al.. (1978). On Toeplitz Operators and Similarity. American Journal of Mathematics. 100(5). 973–973. 2 indexed citations
8.
Ahern, Patrick & Douglas N. Clark. (1974). On inner functions with $H^p$-derivative.. The Michigan Mathematical Journal. 21(2). 59 indexed citations
9.
Clark, Douglas N.. (1973). Concrete model theory for a class of operators. Journal of Functional Analysis. 14(3). 269–280. 3 indexed citations
10.
Clark, Douglas N.. (1972). Some star-invariant subspaces in two variables. Duke Mathematical Journal. 39(3). 1 indexed citations
11.
Clark, Douglas N.. (1972). Commutants that do not dilate. Proceedings of the American Mathematical Society. 35(2). 483–486. 2 indexed citations
12.
Ahern, Patrick & Douglas N. Clark. (1971). Radial nth Derivatives of Blaschke Products.. MATHEMATICA SCANDINAVICA. 28. 189–189. 19 indexed citations
13.
Clark, Douglas N.. (1970). On commuting contractions. Journal of Mathematical Analysis and Applications. 32(3). 590–596. 7 indexed citations
14.
Ahern, Patrick & Douglas N. Clark. (1970). On functions orthogonal to invariant subspaces. Acta Mathematica. 124(0). 191–204. 55 indexed citations
15.
Clark, Douglas N.. (1970). On interpolating sequences and the theory of Hankel and Toeplitz matrices. Journal of Functional Analysis. 5(2). 247–258. 7 indexed citations
16.
Ahern, Patrick & Douglas N. Clark. (1970). On star-invariant subspaces. Bulletin of the American Mathematical Society. 76(3). 629–632. 2 indexed citations
17.
Clark, Douglas N.. (1968). Hankel forms, Toeplitz forms and meromorphic functions. Transactions of the American Mathematical Society. 134(1). 109–116. 9 indexed citations
18.
Clark, Douglas N.. (1967). On the Point Spectrum of a Toeplitz Operator. Transactions of the American Mathematical Society. 126(2). 251–251. 1 indexed citations
19.
Clark, Douglas N.. (1967). On the point spectrum of a Toeplitz operator. Transactions of the American Mathematical Society. 126(2). 251–266. 1 indexed citations
20.
Clark, Douglas N.. (1966). A note on the $p$-adic convergence of solutions of linear differential equations. Proceedings of the American Mathematical Society. 17(1). 262–262. 25 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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2026