John de Pillis

475 total citations
30 papers, 361 citations indexed

About

John de Pillis is a scholar working on Computational Theory and Mathematics, Numerical Analysis and Statistical and Nonlinear Physics. According to data from OpenAlex, John de Pillis has authored 30 papers receiving a total of 361 indexed citations (citations by other indexed papers that have themselves been cited), including 25 papers in Computational Theory and Mathematics, 13 papers in Numerical Analysis and 5 papers in Statistical and Nonlinear Physics. Recurrent topics in John de Pillis's work include Matrix Theory and Algorithms (23 papers), Advanced Optimization Algorithms Research (11 papers) and Iterative Methods for Nonlinear Equations (5 papers). John de Pillis is often cited by papers focused on Matrix Theory and Algorithms (23 papers), Advanced Optimization Algorithms Research (11 papers) and Iterative Methods for Nonlinear Equations (5 papers). John de Pillis collaborates with scholars based in United States, Italy and Germany. John de Pillis's co-authors include R. S. Varga, Wilhelm Niethammer, Michael Neumann, Thomas A. Manteuffel, R.C.Y. Chin, J. L. Brenner, A. Hadjidimos and G. Avdelas and has published in prestigious journals such as SIAM Journal on Numerical Analysis, Journal of Mathematical Analysis and Applications and Transactions of the American Mathematical Society.

In The Last Decade

John de Pillis

26 papers receiving 267 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
John de Pillis United States	8	220	125	97	77	67	30	361
Hebing Wu China	11	398 1.8×	220 1.8×	121 1.2×	27 0.4×	49 0.7×	16	421
Chun Yuan Deng China	11	246 1.1×	86 0.7×	42 0.4×	23 0.3×	103 1.5×	15	314
Zhongyun Liu China	10	213 1.0×	119 1.0×	59 0.6×	24 0.3×	25 0.4×	49	337
F‎. ‎E‎. Levis Argentina	8	231 1.1×	84 0.7×	49 0.5×	29 0.4×	55 0.8×	41	310
Xingping Sheng China	12	306 1.4×	206 1.6×	44 0.5×	34 0.4×	20 0.3×	27	351
Igor Klep Slovenia	12	202 0.9×	96 0.8×	47 0.5×	54 0.7×	166 2.5×	70	397
S. K. Jain United States	12	220 1.0×	98 0.8×	73 0.8×	13 0.2×	301 4.5×	51	503
P. K. Suetin Russia	6	76 0.3×	55 0.4×	29 0.3×	23 0.3×	23 0.3×	11	297
D. E. Ferreyra Argentina	8	273 1.2×	80 0.6×	59 0.6×	35 0.5×	67 1.0×	27	290
Panayiotis Psarrakos Greece	12	379 1.7×	181 1.4×	45 0.5×	12 0.2×	70 1.0×	60	454

Countries citing papers authored by John de Pillis

Since Specialization

Citations

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

Fields of papers citing papers by John de Pillis

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John de Pillis. 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 John de Pillis. The network helps show where John de Pillis may publish in the future.

Co-authorship network of co-authors of John de Pillis

This figure shows the co-authorship network connecting the top 25 collaborators of John de Pillis. A scholar is included among the top collaborators of John de Pillis 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 John de Pillis. John de Pillis is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Pillis, John de. (1991). A parallelizable SOR-like method: Systems with plus-shaped and linear spectra. Linear Algebra and its Applications. 154-156. 551–582. 1 indexed citations

Pillis, John de & Michael Neumann. (1985). The Effect of the Perturbation of Hermitian Matrices on their Eigenvectors. SIAM Journal on Algebraic and Discrete Methods. 6(2). 201–209. 2 indexed citations

Niethammer, Wilhelm, John de Pillis, & R. S. Varga. (1984). Convergence of block iterative methods applied to sparse least-squares problems. Linear Algebra and its Applications. 58. 327–341. 50 indexed citations

Pillis, John de. (1980). How to embrace your spectrum for faster iterative results. Linear Algebra and its Applications. 34. 125–143. 24 indexed citations

Pillis, John de. (1978). Characterizations of sums of dyads and of Kronecker products. Linear and Multilinear Algebra. 6(1). 23–31. 1 indexed citations

Pillis, John de. (1978). Faster Convergence for Iterative Solutions to Systems via Three-Part Splitting. SIAM Journal on Numerical Analysis. 15(5). 888–911. 3 indexed citations

Pillis, John de. (1976). k-Part splittings and operator parameter overrelaxation. Journal of Mathematical Analysis and Applications. 53(2). 313–342. 3 indexed citations

Pillis, John de. (1976). Graphical techniques and 3-part splittings for linear systems. Journal of Approximation Theory. 17(1). 44–56. 1 indexed citations

Pillis, John de. (1975). An extended duality theorem and multiplication of several matrices. Linear and Multilinear Algebra. 3(1-2). 161–168. 1 indexed citations

10.

Pillis, John de. (1973). Gauss–Seidel Convergence for Operators on Hilbert Space. SIAM Journal on Numerical Analysis. 10(1). 112–122. 4 indexed citations

11.

Brenner, J. L. & John de Pillis. (1972). Fermat's Equation Ap+Bp=Cp for Matrices of Integers. Mathematics Magazine. 45(1). 12–12. 1 indexed citations

12.

Pillis, John de & J. L. Brenner. (1971). Generalized elementary symmetric functions and quaternion matrices. Linear Algebra and its Applications. 4(1). 55–69. 4 indexed citations

13.

Pillis, John de. (1971). Inequalities for partitioned positive semidefinite matrices. Linear Algebra and its Applications. 4(1). 79–94. 4 indexed citations

14.

Pillis, John de. (1971). Convexity properties of a generalized numerical range. Pacific Journal of Mathematics. 39(3). 767–781. 35 indexed citations

15.

Pillis, John de. (1969). Linear algebra. 1 indexed citations

16.

Pillis, John de. (1969). Transformations on partitioned matrices. Duke Mathematical Journal. 36(3). 12 indexed citations

17.

Pillis, John de. (1968). Grassmann algebras as Hilbert space. Journal of Algebra. 10(4). 485–500. 3 indexed citations

18.

Pillis, John de. (1967). Linear transformations which preserve hermitian and positive semidefinite operators. Pacific Journal of Mathematics. 23(1). 129–137. 139 indexed citations

19.

Pillis, John de. (1966). Noncommutative Markov Processes. Transactions of the American Mathematical Society. 125(2). 264–264.

20.

Pillis, John de. (1966). Noncommutative Markov processes. Transactions of the American Mathematical Society. 125(2). 264–279. 2 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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