Robert Sine

669 total citations
52 papers, 479 citations indexed

About

Robert Sine is a scholar working on Mathematical Physics, Geometry and Topology and Computational Theory and Mathematics. According to data from OpenAlex, Robert Sine has authored 52 papers receiving a total of 479 indexed citations (citations by other indexed papers that have themselves been cited), including 26 papers in Mathematical Physics, 21 papers in Geometry and Topology and 19 papers in Computational Theory and Mathematics. Recurrent topics in Robert Sine's work include Optimization and Variational Analysis (14 papers), Fixed Point Theorems Analysis (13 papers) and Advanced Banach Space Theory (12 papers). Robert Sine is often cited by papers focused on Optimization and Variational Analysis (14 papers), Fixed Point Theorems Analysis (13 papers) and Advanced Banach Space Theory (12 papers). Robert Sine collaborates with scholars based in United States and Israel. Robert Sine's co-authors include Michael Lin, Mohamed A. Khamsi, Benton Jamison and E. S. Thomas and has published in prestigious journals such as Journal of Mathematical Analysis and Applications, Transactions of the American Mathematical Society and American Mathematical Monthly.

In The Last Decade

Robert Sine

44 papers receiving 338 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Robert Sine United States	12	250	247	227	154	60	52	479
R. B. Darst United States	10	107 0.4×	155 0.6×	214 0.9×	137 0.9×	90 1.5×	73	458
P. H. Maserick United States	10	97 0.4×	133 0.5×	151 0.7×	153 1.0×	32 0.5×	23	356
R. E. Smithson United States	12	222 0.9×	183 0.7×	102 0.4×	106 0.7×	33 0.6×	36	463
Ryōtarō Satō Japan	11	111 0.4×	94 0.4×	283 1.2×	176 1.1×	68 1.1×	93	465
Sadayuki Yamamuro Australia	10	118 0.5×	115 0.5×	178 0.8×	118 0.8×	20 0.3×	56	350
Ştefan Cobzaş Romania	10	333 1.3×	197 0.8×	204 0.9×	153 1.0×	83 1.4×	35	501
Mary R. Embry United States	12	94 0.4×	166 0.7×	177 0.8×	203 1.3×	34 0.6×	20	442
Shizuo Kakutani United States	13	129 0.5×	86 0.3×	321 1.4×	100 0.6×	44 0.7×	20	449
Paul Milnes Canada	13	276 1.1×	129 0.5×	336 1.5×	145 0.9×	32 0.5×	62	548
Petr Habala Czechia	2	175 0.7×	192 0.8×	396 1.7×	275 1.8×	100 1.7×	7	530

Countries citing papers authored by Robert Sine

Since Specialization

Citations

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

Fields of papers citing papers by Robert Sine

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Robert Sine

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Khamsi, Mohamed A., Michael Lin, & Robert Sine. (1992). On the fixed points of commuting nonexpansive maps in hyperconvex spaces. Journal of Mathematical Analysis and Applications. 168(2). 372–380. 17 indexed citations

Sine, Robert. (1991). Constricted Systems. Rocky Mountain Journal of Mathematics. 21(4). 12 indexed citations

Sine, Robert. (1990). A Nonlinear Perron-Frobenius Theorem. Proceedings of the American Mathematical Society. 109(2). 331–331. 8 indexed citations

Sine, Robert. (1990). A nonlinear Perron-Frobenius theorem. Proceedings of the American Mathematical Society. 109(2). 331–336. 25 indexed citations

Lin, Michael & Robert Sine. (1990). Retractions on the fixed point set of semigroups of nonexpansive maps in hyperconvex spaces. Nonlinear Analysis. 15(10). 943–954. 11 indexed citations

Sine, Robert. (1989). Hyperconvexity and nonexpansive multifunctions. Transactions of the American Mathematical Society. 315(2). 755–767. 26 indexed citations

Sine, Robert. (1987). On the Converse of the Nonexpansive Map Fixed Point Theorem for Hilbert Space. Proceedings of the American Mathematical Society. 100(3). 489–489. 1 indexed citations

Sine, Robert. (1987). Compact abelian actions on the two cell. Topology and its Applications. 27(3). 257–263.

Sine, Robert, et al.. (1982). Weakly almost periodic mappings on two-dimensional manifolds. Topology and its Applications. 13(1). 69–76. 1 indexed citations

10.

Sine, Robert, et al.. (1980). Some topological properties of weakly almost periodic mappings. Topology and its Applications. 11(1). 69–85. 3 indexed citations

11.

Jamison, Benton & Robert Sine. (1979). Unique ergodicity for certain random translations. Proceedings of the American Mathematical Society. 75(1). 73–74. 2 indexed citations

12.

Sine, Robert. (1976). A note on the ergodic properties of homeomorphisms. Proceedings of the American Mathematical Society. 57(1). 169–172. 6 indexed citations

13.

Sine, Robert. (1976). A Characterization of the Ball in R 3. American Mathematical Monthly. 83(4). 260–260. 1 indexed citations

14.

Sine, Robert. (1975). Convex combinations of uniformly mean stable Markov operators. Proceedings of the American Mathematical Society. 51(1). 123–126. 5 indexed citations

15.

Sine, Robert. (1975). Convex Combinations of Uniformly Mean Stable Markov Operators. Proceedings of the American Mathematical Society. 51(1). 123–123.

16.

Sine, Robert. (1974). Convergence theorems for weakly almost periodic Markov operators. Israel Journal of Mathematics. 19(3). 246–255. 6 indexed citations

17.

Sine, Robert. (1973). An example in the theory of stable Markov operators. Israel Journal of Mathematics. 14(3). 283–284. 1 indexed citations

18.

Sine, Robert. (1969). A Note on Rays at the Identity Operator. Proceedings of the American Mathematical Society. 23(3). 546–546. 1 indexed citations

19.

Sine, Robert. (1967). On a Paper of Phelps. Proceedings of the American Mathematical Society. 18(3). 484–484. 2 indexed citations

20.

Sine, Robert. (1967). On a paper of Phelps. Proceedings of the American Mathematical Society. 18(3). 484–486. 6 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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