Naum Krupnik

930 total citations
26 papers, 502 citations indexed

About

Naum Krupnik is a scholar working on Applied Mathematics, Mathematical Physics and Algebra and Number Theory. According to data from OpenAlex, Naum Krupnik has authored 26 papers receiving a total of 502 indexed citations (citations by other indexed papers that have themselves been cited), including 17 papers in Applied Mathematics, 15 papers in Mathematical Physics and 13 papers in Algebra and Number Theory. Recurrent topics in Naum Krupnik's work include Advanced Topics in Algebra (13 papers), Holomorphic and Operator Theory (11 papers) and Matrix Theory and Algorithms (9 papers). Naum Krupnik is often cited by papers focused on Advanced Topics in Algebra (13 papers), Holomorphic and Operator Theory (11 papers) and Matrix Theory and Algorithms (9 papers). Naum Krupnik collaborates with scholars based in Israel, United States and Germany. Naum Krupnik's co-authors include Israel Gohberg, Seymour Goldberg, Ilya M. Spitkovsky, Israel Feldman, Woo Young Lee, Douglas Farenick, A. Markus, Bernd Silbermann and Steffen Roch and has published in prestigious journals such as Journal of Functional Analysis, Linear Algebra and its Applications and SIAM Journal on Matrix Analysis and Applications.

In The Last Decade

Naum Krupnik

25 papers receiving 440 citations

Peers

Naum Krupnik
Torsten Ehrhardt Germany
Douglas Farenick Canada
Leonid Golinskiĭ Ukraine
M. A. Akcoglu Canada
Steffen Roch Germany
J. Bustoz United States
Franciszek Hugon Szafraniec Poland
Kevin F. Clancey United States
Clemens Markett Germany
Balmohan V. Limaye India
Torsten Ehrhardt Germany
Naum Krupnik
Citations per year, relative to Naum Krupnik Naum Krupnik (= 1×) peers Torsten Ehrhardt

Countries citing papers authored by Naum Krupnik

Since Specialization
Citations

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

Fields of papers citing papers by Naum Krupnik

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Naum Krupnik

This figure shows the co-authorship network connecting the top 25 collaborators of Naum Krupnik. A scholar is included among the top collaborators of Naum Krupnik 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 Naum Krupnik. Naum Krupnik 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.
Krupnik, Naum & Ilya M. Spitkovsky. (2006). Sets of matrices with given joint numerical range. Linear Algebra and its Applications. 419(2-3). 569–585. 4 indexed citations
2.
Krupnik, Naum. (2003). On the lengths of Jordan chains for eigenvalues on the boundary of numerical range of quadratic operator polynomial. Linear Algebra and its Applications. 385. 131–147. 1 indexed citations
3.
Krupnik, Naum, et al.. (2000). On trivial and non-trivial n-homogeneousC * algebras. Integral Equations and Operator Theory. 38(2). 172–189. 3 indexed citations
4.
Feldman, Israel & Naum Krupnik. (2000). On the continuity of the spectrum in certain Banach algebras. Integral Equations and Operator Theory. 38(3). 284–301. 1 indexed citations
5.
Krupnik, Naum, et al.. (1999). Critical points of essential norms of singular integral operators in weighted spaces. Integral Equations and Operator Theory. 33(2). 211–220. 1 indexed citations
6.
Krupnik, Naum. (1998). Symmetrization of the symbol in Banach algebras generated by idempotents. Integral Equations and Operator Theory. 31(4). 470–481. 2 indexed citations
7.
Krupnik, Naum, et al.. (1997). On the norms of singular integral operators along certain curves with intersections. Integral Equations and Operator Theory. 29(1). 10–16. 2 indexed citations
8.
Gohberg, Israel, Seymour Goldberg, & Naum Krupnik. (1997). Hilbert-Carleman and regularized determinants for linear operators. Integral Equations and Operator Theory. 27(1). 10–47. 12 indexed citations
9.
Krupnik, Naum & Steffen Roch. (1996). On invertibility symbols in Banach algebras. Linear Algebra and its Applications. 245. 77–81. 1 indexed citations
10.
Krupnik, Naum, Steffen Roch, & Bernd Silbermann. (1996). OnC*-Algebras Generated by Idempotents. Journal of Functional Analysis. 137(2). 303–319. 9 indexed citations
11.
Farenick, Douglas, et al.. (1996). Normal Toeplitz Matrices. SIAM Journal on Matrix Analysis and Applications. 17(4). 1037–1043. 22 indexed citations
12.
Feldman, Israel, Naum Krupnik, & Ilya M. Spitkovsky. (1996). Norms of the singular integral operator with Cauchy Kernel along certain contours. Integral Equations and Operator Theory. 24(1). 68–80. 6 indexed citations
13.
Gohberg, Israel & Naum Krupnik. (1993). Extension theorems for Fredholm and invertibility symbols. Integral Equations and Operator Theory. 16(4). 514–529. 24 indexed citations
14.
Gohberg, Israel & Naum Krupnik. (1992). One-Dimensional Linear Singular Integral Equations. Birkhäuser Basel eBooks. 160 indexed citations
15.
Krupnik, Naum. (1992). Minimal number of idempotent generators of matrix algebras over arbitrary field. Communications in Algebra. 20(11). 3251–3257. 6 indexed citations
16.
Gohberg, Israel & Naum Krupnik. (1992). One-Dimensional Linear Singular Integral Equations. Birkhäuser Basel eBooks. 51 indexed citations
17.
Gohberg, Israel & Naum Krupnik. (1992). Extension theorems for Invertibility Symbols in Banach algebras. Integral Equations and Operator Theory. 15(6). 991–1010. 19 indexed citations
18.
Feldman, Israel, Naum Krupnik, & A. Markus. (1991). On the norm of polynomials of two adjoint projections. Integral Equations and Operator Theory. 14(1). 69–91. 16 indexed citations
19.
Krupnik, Naum. (1991). The conditions of selfadjointness of the operator of singular integration. Integral Equations and Operator Theory. 14(5). 760–763. 4 indexed citations
20.
Krupnik, Naum & Bernd Silbermann. (1989). The Structure of Some BANACH Algebras Fulfilling a Standard Identity. Mathematische Nachrichten. 142(1). 175–180. 3 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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