Shôichirô Sakai

2.0k total citations
52 papers, 1.1k citations indexed

About

Shôichirô Sakai is a scholar working on Mathematical Physics, Algebra and Number Theory and Computational Theory and Mathematics. According to data from OpenAlex, Shôichirô Sakai has authored 52 papers receiving a total of 1.1k indexed citations (citations by other indexed papers that have themselves been cited), including 35 papers in Mathematical Physics, 27 papers in Algebra and Number Theory and 17 papers in Computational Theory and Mathematics. Recurrent topics in Shôichirô Sakai's work include Advanced Operator Algebra Research (27 papers), Advanced Topics in Algebra (25 papers) and Advanced Banach Space Theory (15 papers). Shôichirô Sakai is often cited by papers focused on Advanced Operator Algebra Research (27 papers), Advanced Topics in Algebra (25 papers) and Advanced Banach Space Theory (15 papers). Shôichirô Sakai collaborates with scholars based in United States and Japan. Shôichirô Sakai's co-authors include Robert T. Powers, Narutaka Ozawa, Akitaka Kishimoto and Geoffrey L. Price and has published in prestigious journals such as Communications in Mathematical Physics, Annals of Mathematics and Transactions of the American Mathematical Society.

In The Last Decade

Shôichirô Sakai

46 papers receiving 807 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Shôichirô Sakai United States 17 759 689 227 224 192 52 1.1k
正一郎 境 2 658 0.9× 496 0.7× 215 0.9× 151 0.7× 133 0.7× 2 858
Robert T. Powers United States 16 862 1.1× 516 0.7× 289 1.3× 242 1.1× 161 0.8× 37 1.2k
J. M. G. Fell United States 17 1.1k 1.5× 717 1.0× 263 1.2× 526 2.3× 204 1.1× 27 1.4k
Gert Kjærgård Pedersen Denmark 10 1.5k 2.0× 1.2k 1.8× 344 1.5× 438 2.0× 171 0.9× 16 1.7k
Michel Waldschmidt France 17 364 0.5× 365 0.5× 218 1.0× 489 2.2× 259 1.3× 77 968
Alain Guichardet France 10 386 0.5× 197 0.3× 117 0.5× 177 0.8× 60 0.3× 31 559
Bruce Blackadar United States 19 1.8k 2.4× 1.5k 2.2× 358 1.6× 578 2.6× 151 0.8× 30 2.0k
S. J. Patterson Germany 17 856 1.1× 354 0.5× 367 1.6× 654 2.9× 72 0.4× 47 1.2k
Hideki Kosaki Japan 21 1.2k 1.6× 658 1.0× 826 3.6× 358 1.6× 258 1.3× 63 1.6k
C. R. Putnam United States 17 609 0.8× 324 0.5× 728 3.2× 159 0.7× 421 2.2× 91 1.2k

Countries citing papers authored by Shôichirô Sakai

Since Specialization
Citations

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

Fields of papers citing papers by Shôichirô Sakai

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Shôichirô Sakai

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

All Works

20 of 20 papers shown
1.
Price, Geoffrey L. & Shôichirô Sakai. (2007). Extremal marginal tracial states in coupled systems. Operators and Matrices. 153–163. 2 indexed citations
2.
Sakai, Shôichirô. (1978). Unbounded Derivations in Commutative C*-Algebras (同型写像と非有界微分子). Kyoto University Research Information Repository (Kyoto University). 320. 32–45. 1 indexed citations
3.
Sakai, Shôichirô. (1976). On commutative normal ∗-derivations, II. Journal of Functional Analysis. 21(2). 203–208. 9 indexed citations
4.
Powers, Robert T. & Shôichirô Sakai. (1975). Unbounded derivations in operator algebras. Journal of Functional Analysis. 19(1). 81–95. 29 indexed citations
5.
Powers, Robert T. & Shôichirô Sakai. (1975). Existence of ground states and KMS states for approximately inner dynamics. Communications in Mathematical Physics. 39(4). 273–288. 39 indexed citations
6.
Sakai, Shôichirô. (1971). Derivations of simple $C^{\ast}$-algebras, III. Tohoku Mathematical Journal. 23(3). 10 indexed citations
7.
Sakai, Shôichirô. (1971). On global type II1 W∗ algebras. Journal of Functional Analysis. 8(1). 95–100. 1 indexed citations
8.
Sakai, Shôichirô. (1970). An uncountable number of II1 and II∞ factors. Journal of Functional Analysis. 5(2). 236–246. 13 indexed citations
9.
Sakai, Shôichirô. (1970). On the Stone-Weierstrass theorem of $C^{\ast}$-algebras. Tohoku Mathematical Journal. 22(2). 12 indexed citations
10.
Sakai, Shôichirô. (1969). On global W∗-algebras. Journal of Functional Analysis. 3(1). 79–84. 1 indexed citations
11.
Sakai, Shôichirô. (1968). On the hyperfinite 𝐼𝐼₁-factor. Proceedings of the American Mathematical Society. 19(3). 589–591. 1 indexed citations
12.
Sakai, Shôichirô. (1968). Derivations of simple C∗-algebras. Journal of Functional Analysis. 2(2). 202–206. 35 indexed citations
13.
Sakai, Shôichirô. (1967). On type 𝐼 𝐶*-algebras. Proceedings of the American Mathematical Society. 18(5). 861–863. 3 indexed citations
14.
Sakai, Shôichirô. (1967). Derivations of uniformly hyperfinite C*-algebras. Publications of the Research Institute for Mathematical Sciences. 3(2). 167–175. 4 indexed citations
15.
Sakai, Shôichirô. (1966). On a Problem of Calkin. American Journal of Mathematics. 88(4). 935–935. 6 indexed citations
16.
Sakai, Shôichirô. (1965). On the Central Decomposition for Positive Functionals on C∗-Algebras. Transactions of the American Mathematical Society. 118. 406–406. 6 indexed citations
17.
Sakai, Shôichirô. (1964). Weakly compact operators on operator algebras. Pacific Journal of Mathematics. 14(2). 659–664. 86 indexed citations
18.
Sakai, Shôichirô. (1959). On some problems of $C^{\ast}$-algebras. Tohoku Mathematical Journal. 11(3). 3 indexed citations
19.
Sakai, Shôichirô. (1956). The absolute value of $W^*$-algebras of finite type. Tohoku Mathematical Journal. 8(1). 4 indexed citations
20.
Sakai, Shôichirô. (1954). On the representations of semi-simple Lie groups. Proceedings of the Japan Academy Series A Mathematical Sciences. 30(1). 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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