J. L. Ullman

548 total citations
28 papers, 328 citations indexed

About

J. L. Ullman is a scholar working on Applied Mathematics, Mathematical Physics and Geometry and Topology. According to data from OpenAlex, J. L. Ullman has authored 28 papers receiving a total of 328 indexed citations (citations by other indexed papers that have themselves been cited), including 15 papers in Applied Mathematics, 11 papers in Mathematical Physics and 10 papers in Geometry and Topology. Recurrent topics in J. L. Ullman's work include Mathematical functions and polynomials (12 papers), Mathematical Dynamics and Fractals (6 papers) and Iterative Methods for Nonlinear Equations (4 papers). J. L. Ullman is often cited by papers focused on Mathematical functions and polynomials (12 papers), Mathematical Dynamics and Fractals (6 papers) and Iterative Methods for Nonlinear Equations (4 papers). J. L. Ullman collaborates with scholars based in United States, United Kingdom and Mexico. J. L. Ullman's co-authors include Roger C. Lyndon, H. Alexander, B. A. Taylor, James A. Deddens, I. N. Baker, Вилмос Тотик, Alice Lazzarini, John M. Opitz, Michael K. McCormack and David K. Kahaner and has published in prestigious journals such as SIAM Journal on Numerical Analysis, Transactions of the American Mathematical Society and Inventiones mathematicae.

In The Last Decade

J. L. Ullman

25 papers receiving 217 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
J. L. Ullman United States	10	190	120	106	72	63	28	328
Joe Jenkins United States	14	202 1.1×	144 1.2×	345 3.3×	55 0.8×	128 2.0×	38	470
J. Dombrowski United States	12	215 1.1×	36 0.3×	183 1.7×	151 2.1×	49 0.8×	19	300
Joel D. Pincus United States	13	395 2.1×	80 0.7×	318 3.0×	135 1.9×	107 1.7×	40	512
Chao-Liang Shen Taiwan	11	122 0.6×	73 0.6×	401 3.8×	209 2.9×	103 1.6×	23	465
Kathryn E. Hare Canada	9	103 0.5×	162 1.4×	260 2.5×	48 0.7×	44 0.7×	85	324
M. T. Karaev Türkiye	11	380 2.0×	113 0.9×	105 1.0×	92 1.3×	89 1.4×	45	414
Jürgen Leiterer Germany	11	439 2.3×	284 2.4×	206 1.9×	79 1.1×	64 1.0×	45	570
Gordon Pall United States	6	34 0.2×	84 0.7×	46 0.4×	85 1.2×	80 1.3×	22	189
Andreas Strömbergsson Sweden	10	51 0.3×	88 0.7×	165 1.6×	29 0.4×	111 1.8×	20	265
Leonard S. Charlap United States	8	74 0.4×	213 1.8×	172 1.6×	40 0.6×	58 0.9×	10	306

Countries citing papers authored by J. L. Ullman

Since Specialization

Citations

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

Fields of papers citing papers by J. L. Ullman

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J. L. Ullman. 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 J. L. Ullman. The network helps show where J. L. Ullman may publish in the future.

Co-authorship network of co-authors of J. L. Ullman

This figure shows the co-authorship network connecting the top 25 collaborators of J. L. Ullman. A scholar is included among the top collaborators of J. L. Ullman 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 J. L. Ullman. J. L. Ullman 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

Тотик, Вилмос & J. L. Ullman. (1994). Local asymptotic distribution of zeros of orthogonal polynomials. Transactions of the American Mathematical Society. 341(2). 881–894. 4 indexed citations

Ullman, J. L., et al.. (1986). Norm oscillatory weight measures. Journal of Approximation Theory. 46(2). 204–212. 7 indexed citations

McCormack, Michael K., J. L. Ullman, Alice Lazzarini, & John M. Opitz. (1982). Altered red cell osmotic fragility in Huntington disease (HD). American Journal of Medical Genetics. 11(1). 53–59. 6 indexed citations

Ullman, J. L.. (1980). Orthogonal polynomials associated with an infinite interval.. The Michigan Mathematical Journal. 27(3). 23 indexed citations

Baker, I. N., James A. Deddens, & J. L. Ullman. (1974). A theorem on entire functions with applications to Toeplitz operators. Duke Mathematical Journal. 41(4). 17 indexed citations

Ullman, J. L.. (1973). An Area Theorem for Schlicht Functions. American Mathematical Monthly. 80(2). 184–186. 2 indexed citations

Ullman, J. L.. (1972). The location of the zeros of the derivatives of Faber polynomials. Proceedings of the American Mathematical Society. 34(2). 422–424. 9 indexed citations

Ullman, J. L.. (1972). On the Regular Behaviour of Orthogonal Polynomials. Proceedings of the London Mathematical Society. s3-24(1). 119–148. 44 indexed citations

Ullman, J. L.. (1971). Toeplitz Matrices Associated with a Semi-Infinite Laurent Series. Proceedings of the London Mathematical Society. s3-22(1). 164–192. 5 indexed citations

10.

Lyndon, Roger C. & J. L. Ullman. (1969). Groups Generated by two Parabolic Linear Fractional Transformations. Canadian Journal of Mathematics. 21. 1388–1403. 47 indexed citations

11.

Lyndon, Roger C. & J. L. Ullman. (1968). Pairs of real $2$-by-$2$ matrices that generate free products.. The Michigan Mathematical Journal. 15(2). 23 indexed citations

12.

Lyndon, Roger C. & J. L. Ullman. (1967). Groups of elliptic linear fractional transformations. Proceedings of the American Mathematical Society. 18(6). 1119–1124. 3 indexed citations

13.

Ullman, J. L.. (1966). A class of weight functions for which Tchebycheff quadrature is possible. Bulletin of the American Mathematical Society. 72(6). 1073–1075. 3 indexed citations

14.

Ullman, J. L.. (1966). A class of weight functions that admit Tchebycheff quadrature.. The Michigan Mathematical Journal. 13(4). 13 indexed citations

15.

Ullman, J. L.. (1963). Tchebycheff quadrature on the infinite interval. Transactions of the American Mathematical Society. 107(2). 291–299. 2 indexed citations

16.

Ullman, J. L.. (1960). Studies in Faber Polynomials. I. Transactions of the American Mathematical Society. 94(3). 515–515. 2 indexed citations

17.

Ullman, J. L.. (1960). Studies in Faber polynomials. I. Transactions of the American Mathematical Society. 94(3). 515–528. 9 indexed citations

18.

Ullman, J. L.. (1959). On Tchebycheff polynomials. Pacific Journal of Mathematics. 9(3). 913–923. 27 indexed citations

19.

Ullman, J. L.. (1951). Two mapping properties of schlicht functions. Proceedings of the American Mathematical Society. 2(4). 654–657. 3 indexed citations

20.

Ullman, J. L.. (1951). Hankel determinants whose elements are sections of a Taylor series. Part I. Duke Mathematical Journal. 18(3). 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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