D. Willett

1.2k total citations · 1 hit paper
29 papers, 906 citations indexed

About

D. Willett is a scholar working on Applied Mathematics, Numerical Analysis and Computational Theory and Mathematics. According to data from OpenAlex, D. Willett has authored 29 papers receiving a total of 906 indexed citations (citations by other indexed papers that have themselves been cited), including 21 papers in Applied Mathematics, 18 papers in Numerical Analysis and 6 papers in Computational Theory and Mathematics. Recurrent topics in D. Willett's work include Nonlinear Differential Equations Analysis (14 papers), Differential Equations and Numerical Methods (13 papers) and Differential Equations and Boundary Problems (11 papers). D. Willett is often cited by papers focused on Nonlinear Differential Equations Analysis (14 papers), Differential Equations and Numerical Methods (13 papers) and Differential Equations and Boundary Problems (11 papers). D. Willett collaborates with scholars based in United States and Canada. D. Willett's co-authors include John H. Barrett, Robert E. O’Malley, Robert McKelvey, Lloyd Jackson, J. S. W. Wong, James S. Muldowney and A. Meir and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, SIAM Review and Archive for Rational Mechanics and Analysis.

In The Last Decade

D. Willett

24 papers receiving 654 citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Lectures on ordinary differential equations

1970 362 citations Robert McKelvey, John H. Barrett et al. CERN Document Server (European Organization for Nuclear Research) profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
D. Willett United States	13	554	381	223	217	115	29	906
Lloyd Jackson United States	14	620 1.1×	458 1.2×	349 1.6×	193 0.9×	102 0.9×	24	997
Donald A. Lutz United States	16	320 0.6×	270 0.7×	237 1.1×	207 1.0×	151 1.3×	40	752
John H. Barrett United States	10	284 0.5×	242 0.6×	168 0.8×	172 0.8×	103 0.9×	19	607
Frank Smithies United States	10	646 1.2×	139 0.4×	434 1.9×	446 2.1×	80 0.7×	28	1.1k
Yasutaka Sibuya United States	18	286 0.5×	291 0.8×	257 1.2×	191 0.9×	193 1.7×	55	832
Angelo B. Mingarelli Canada	14	318 0.6×	260 0.7×	306 1.4×	305 1.4×	103 0.9×	58	701
Werner Balser Germany	13	368 0.7×	252 0.7×	266 1.2×	166 0.8×	249 2.2×	58	881
E. B. Saff United States	14	499 0.9×	294 0.8×	150 0.7×	88 0.4×	60 0.5×	58	782
А. М. Самойленко Ukraine	10	326 0.6×	323 0.8×	105 0.5×	187 0.9×	243 2.1×	96	726
R. Creighton Buck United States	13	406 0.7×	144 0.4×	156 0.7×	271 1.2×	98 0.9×	47	1.0k

Countries citing papers authored by D. Willett

Since Specialization

Citations

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

Fields of papers citing papers by D. Willett

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of D. Willett

This figure shows the co-authorship network connecting the top 25 collaborators of D. Willett. A scholar is included among the top collaborators of D. Willett 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 D. Willett. D. Willett 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

Willett, D.. (2024). Woody Guthrie: Racial Transformation through the Framework of the “Long Civil Rights Movement”. Journal of American Folklore. 137(544). 219–230.

Willett, D.. (1978). Differential inequalities and the asymptotics of second order nonlinear differential equations. Rocky Mountain Journal of Mathematics. 8(3).

Willett, D., et al.. (1977). Second Order Singular Boundary Value Problems. SIAM Journal on Mathematical Analysis. 8(4). 741–755. 3 indexed citations

Muldowney, James S. & D. Willett. (1974). An Intermediate Value Property for Operators with Applications to Integral and Differential Equations. Canadian Journal of Mathematics. 26(1). 27–41. 7 indexed citations

Muldowney, James S. & D. Willett. (1974). An Elementary Proof of the Existence of Solutions to Second Order Nonlinear Boundary Value Problems. SIAM Journal on Mathematical Analysis. 5(4). 701–707. 23 indexed citations

Willett, D.. (1973). On the oscillation of ty" + p(t)y = 0 with ʃ p almost periodic. Annales Polonici Mathematici. 28(3). 335–339.

Willett, D.. (1972). Errata: Disconjugacy Tests for Singular Linear Differential Equations. SIAM Journal on Mathematical Analysis. 3(3). 559–559. 4 indexed citations

Willett, D.. (1971). A necessary and sufficient condition for the oscillation of some linear second order differential equations. Rocky Mountain Journal of Mathematics. 1(2). 4 indexed citations

Willett, D.. (1971). Generalized de la Vallée Poussin Disconjugacy Tests for Linear Differential Equations⁽¹⁾. Canadian Mathematical Bulletin. 14(3). 419–428. 14 indexed citations

10.

McKelvey, Robert, John H. Barrett, Lloyd Jackson, Robert E. O’Malley, & D. Willett. (1970). Lectures on ordinary differential equations. CERN Document Server (European Organization for Nuclear Research). 362 indexed citations breakdown →

11.

Willett, D.. (1969). Classification of second order linear differential equations with respect to oscillation. Advances in Mathematics. 3(4). 594–623. 80 indexed citations

12.

Willett, D.. (1969). On the oscillatory behavior of the solutions of second order linear differential equations. Annales Polonici Mathematici. 21(2). 175–194. 89 indexed citations

13.

Willett, D.. (1969). Uniqueness for second order nonlinear boundary value problems with applications to almost periodic solutions. Annali di Matematica Pura ed Applicata (1923 -). 81(1). 77–92. 3 indexed citations

14.

Willett, D. & J. S. W. Wong. (1968). Some properties of the solutions of [p(t) x′]′ + q(t) f(x) = 0. Journal of Mathematical Analysis and Applications. 23(1). 15–24. 10 indexed citations

15.

Willett, D.. (1967). Uniqueness of Solutions of Boundary Value Problems. SIAM Review. 9(4). 726–728. 2 indexed citations

16.

Meir, A., D. Willett, & J. S. W. Wong. (1967). On the asymptotic behavior of the solutions of $x^{\prime\prime}+a(t)x=0$.. The Michigan Mathematical Journal. 14(1). 7 indexed citations

17.

Meir, A., D. Willett, & J. S. W. Wong. (1966). A stability condition for $y^{\prime\prime}+p(x)y=0$.. The Michigan Mathematical Journal. 13(2). 5 indexed citations

18.

Willett, D. & J. S. W. Wong. (1965). On the discrete analogues of some generalizations of Gronwall's inequality. Monatshefte für Mathematik. 69(4). 362–367. 83 indexed citations

19.

Willett, D.. (1965). A linear generalization of Gronwall’s inequality. Proceedings of the American Mathematical Society. 16(4). 774–778. 39 indexed citations

20.

Willett, D.. (1964). Nonlinear vector integral equations as contraction mappings. Archive for Rational Mechanics and Analysis. 15(1). 79–86. 38 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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