Jun Tomiyama

2.2k total citations
107 papers, 1.3k citations indexed

About

Jun Tomiyama is a scholar working on Algebra and Number Theory, Mathematical Physics and Civil and Structural Engineering. According to data from OpenAlex, Jun Tomiyama has authored 107 papers receiving a total of 1.3k indexed citations (citations by other indexed papers that have themselves been cited), including 63 papers in Algebra and Number Theory, 59 papers in Mathematical Physics and 23 papers in Civil and Structural Engineering. Recurrent topics in Jun Tomiyama's work include Advanced Topics in Algebra (59 papers), Advanced Operator Algebra Research (56 papers) and Advanced Banach Space Theory (17 papers). Jun Tomiyama is often cited by papers focused on Advanced Topics in Algebra (59 papers), Advanced Operator Algebra Research (56 papers) and Advanced Banach Space Theory (17 papers). Jun Tomiyama collaborates with scholars based in Japan, United States and Netherlands. Jun Tomiyama's co-authors include Gert K. Pedersen, Charles A. Akemann, Kôtarô Tanahashi, Masamichi Takesaki, Mike Boyle, Kengo Matsumoto, Yuya Suda, Guoxing Ji, Tatsuhiko SAEKI and Tsuyoshi Saito and has published in prestigious journals such as Advances in Mathematics, Journal of Functional Analysis and Pacific Journal of Mathematics.

In The Last Decade

Jun Tomiyama

91 papers receiving 1.0k citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Jun Tomiyama Japan	20	841	743	271	229	209	107	1.3k
Harald Hanche-Olsen Norway	8	290 0.3×	246 0.3×	80 0.3×	115 0.5×	83 0.4×	17	504
Gert Almkvist Sweden	13	115 0.1×	229 0.3×	173 0.6×	92 0.4×	97 0.5×	34	474
Mitsuru Nakai Japan	18	455 0.5×	104 0.1×	427 1.6×	658 2.9×	359 1.7×	155	1.1k
Ronald L. Lipsman United States	17	499 0.6×	224 0.3×	188 0.7×	170 0.7×	31 0.1×	70	684
John W. Gray United States	8	254 0.3×	90 0.1×	316 1.2×	152 0.7×	77 0.4×	22	517
Marina Ratner United States	16	1.0k 1.2×	128 0.2×	587 2.2×	194 0.8×	107 0.5×	24	1.2k
Vagn Lundsgaard Hansen Denmark	11	232 0.3×	91 0.1×	235 0.9×	42 0.2×	71 0.3×	50	400
Elmer Rees United Kingdom	12	190 0.2×	97 0.1×	295 1.1×	73 0.3×	102 0.5×	55	466
D. Newton United Kingdom	12	414 0.5×	31 0.0×	153 0.6×	77 0.3×	105 0.5×	25	540
R. R. Hall United Kingdom	15	210 0.2×	335 0.5×	263 1.0×	239 1.0×	91 0.4×	90	667

Countries citing papers authored by Jun Tomiyama

Since Specialization

Citations

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

Fields of papers citing papers by Jun Tomiyama

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Jun Tomiyama

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

SAEKI, Tatsuhiko, et al.. (2020). AN ESTIMATION METHOD FOR SURFACE CHLORIDE CONCENTRATION ON CONCRETE UNDER AIRBORNE CHLORIDE ENVIRONMENT. Journal of Japan Society of Civil Engineers Ser E2 (Materials and Concrete Structures). 76(2). 98–108.

Tomiyama, Jun, et al.. (2019). Crack Inspection of Concrete Using Images taken by Drone. Concrete Journal. 57(9). 687–692.

Lee, Ji Eun, et al.. (2018). On [m,C]-symmetric Operators. Kyungpook mathematical journal. 58(4). 637–650. 3 indexed citations

Tomiyama, Jun, et al.. (2017). On skew $[m,C]$-symmetric operators. Advances in Operator Theory. 2(4). 468–474. 1 indexed citations

Tomiyama, Jun, et al.. (2017). STUDY ON THE DURABILITY OF FLY ASH CONCRETE EXPOSED TO THE COASTLINE IN OKINAWA PREF. FOR 11YEARS. Journal of Japan Society of Civil Engineers Ser E2 (Materials and Concrete Structures). 73(3). 251–270. 2 indexed citations

Tomiyama, Jun, et al.. (2016). Estimation of the Amount of Chloride Ingress in Concrete Taking Into Account Differences in the Amount of Adhering Salt on Bridge Members. Concrete Journal. 54(2). 164–169. 1 indexed citations

Jeu, Marcel de & Jun Tomiyama. (2016). Algebraically irreducible representations and structure space of the Banach algebra associated with a topological dynamical system. Advances in Mathematics. 301. 79–115. 3 indexed citations

Osaka, Hiroyuki & Jun Tomiyama. (2012). Double piling structure of matrix monotone functions and of matrix convex functions II. Linear Algebra and its Applications. 437(3). 735–748. 1 indexed citations

Tomiyama, Jun, et al.. (2011). ASR DIAGNOSIS BY PETROGRAPHIC INVESTIGATION AND EVALUATION OF MECHANICAL PERFORMANCE OF ASR DETERIORATED PRETENSIONED PC BEAM. Journal of Japan Society of Civil Engineers Ser E2 (Materials and Concrete Structures). 67(4). 578–595. 1 indexed citations

10.

Tomiyama, Jun. (2004). Hulls and kernels from topological dynamical systems and their applications to homeomorphism $C^{*}$ -algebras. Journal of the Mathematical Society of Japan. 56(2). 8 indexed citations

11.

Tomiyama, Jun. (2000). The interplay between topological dynamics and theory of $C^*$-algebras, Part 2 (after the Seoul lecture note 1992) ($C^*$-algebras and its applications to topological dynamical systems). Kyoto University Research Information Repository (Kyoto University). 1151. 1–71. 3 indexed citations

12.

Tomiyama, Jun, et al.. (2000). Analysis on Tension Failure Behavior of Concrete by Free Mesh Method. Concrete Research and Technology. 11(1). 29–38.

13.

Boyle, Mike & Jun Tomiyama. (1998). Bounded topological orbit equivalence and C* -algebras. Journal of the Mathematical Society of Japan. 50(2). 33 indexed citations

14.

Matsumoto, Kengo & Jun Tomiyama. (1992). Non-commutative lens spaces. Journal of the Mathematical Society of Japan. 44(1). 10 indexed citations

15.

Tomiyama, Jun, et al.. (1984). On a Characterization of the Tensor Product of the Selfdual Cones Associated to the Standard von Neumann Algebras. 1–11. 6 indexed citations

16.

Tomiyama, Jun. (1983). Recent Development of the Theory of Completely Bounded Maps between $C^*$-Algebras. Publications of the Research Institute for Mathematical Sciences. 19(3). 1283–1303. 5 indexed citations

17.

Tomiyama, Jun, et al.. (1981). Completely positive maps in the tensor products of von Neumann algebras. Journal of the Mathematical Society of Japan. 33(3). 2 indexed citations

18.

Tomiyama, Jun, et al.. (1977). On subdiagonal algebras associated with flows in operator algebras. Journal of the Mathematical Society of Japan. 29(1). 23 indexed citations

19.

Tomiyama, Jun. (1976). On the Fubini Product of von Neumann Algebras. 9(1). 53–56. 1 indexed citations

20.

Tomiyama, Jun. (1975). Tensor Products and Approximation Problems of $C^*$-Algebras. Publications of the Research Institute for Mathematical Sciences. 11(1). 163–183. 19 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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