Takeaki Yamazaki

1.2k total citations
57 papers, 726 citations indexed

About

Takeaki Yamazaki is a scholar working on Applied Mathematics, Computational Theory and Mathematics and Mathematical Physics. According to data from OpenAlex, Takeaki Yamazaki has authored 57 papers receiving a total of 726 indexed citations (citations by other indexed papers that have themselves been cited), including 47 papers in Applied Mathematics, 22 papers in Computational Theory and Mathematics and 14 papers in Mathematical Physics. Recurrent topics in Takeaki Yamazaki's work include Mathematical Inequalities and Applications (30 papers), Matrix Theory and Algorithms (21 papers) and Holomorphic and Operator Theory (17 papers). Takeaki Yamazaki is often cited by papers focused on Mathematical Inequalities and Applications (30 papers), Matrix Theory and Algorithms (21 papers) and Holomorphic and Operator Theory (17 papers). Takeaki Yamazaki collaborates with scholars based in Japan, South Korea and Iran. Takeaki Yamazaki's co-authors include Mohammad Sal Moslehian, Yongdo Lim, Fuad Kıttaneh, Muneo Chō, T. Andô, Rajendra Bhatia, Takayuki Furuta, Kais Feki, Yūki Seo and B. P. Duggal and has published in prestigious journals such as American Journal of Roentgenology, Journal of Mathematical Analysis and Applications and Energies.

In The Last Decade

Takeaki Yamazaki

50 papers receiving 579 citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Takeaki Yamazaki Japan 14 667 371 152 140 93 57 726
Masatoshi Fujii Japan 15 711 1.1× 246 0.7× 177 1.2× 230 1.6× 75 0.8× 102 819
Marek Niezgoda Poland 10 342 0.5× 150 0.4× 37 0.2× 78 0.6× 46 0.5× 82 396
Arne Stray Norway 12 301 0.5× 102 0.3× 172 1.1× 158 1.1× 105 1.1× 29 530
Petr Habala Czechia 2 275 0.4× 192 0.5× 396 2.6× 175 1.3× 71 0.8× 7 530
Patrick Ahern United States 22 918 1.4× 117 0.3× 343 2.3× 367 2.6× 193 2.1× 69 1.1k
Lázaro Recht Venezuela 14 391 0.6× 155 0.4× 343 2.3× 111 0.8× 221 2.4× 44 577
Peter Volkmann Germany 11 319 0.5× 123 0.3× 139 0.9× 95 0.7× 49 0.5× 73 457
Robert Sine United States 12 154 0.2× 247 0.7× 227 1.5× 250 1.8× 46 0.5× 52 479
Minghua Lin Canada 15 553 0.8× 538 1.5× 41 0.3× 219 1.6× 42 0.5× 53 650
Bruce Barnes United States 11 162 0.2× 151 0.4× 203 1.3× 92 0.7× 168 1.8× 21 431

Countries citing papers authored by Takeaki Yamazaki

Since Specialization
Citations

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

Fields of papers citing papers by Takeaki Yamazaki

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Takeaki Yamazaki

This figure shows the co-authorship network connecting the top 25 collaborators of Takeaki Yamazaki. A scholar is included among the top collaborators of Takeaki Yamazaki 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 Takeaki Yamazaki. Takeaki Yamazaki 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.
Ramesh, G., et al.. (2023). Stability of $${\cal A}{\cal N}$$-Operators under Functional Calculus. Analysis Mathematica. 49(3). 825–839.
2.
3.
Bhatia, Rajendra, Yongdo Lim, & Takeaki Yamazaki. (2016). Some norm inequalities for matrix means. Linear Algebra and its Applications. 501. 112–122. 21 indexed citations
4.
Yamazaki, Takeaki, et al.. (2016). Some properties of weighted operator means and characterizations of interpolational means. Linear Algebra and its Applications. 517. 217–234. 4 indexed citations
5.
Kıttaneh, Fuad, Mohammad Sal Moslehian, & Takeaki Yamazaki. (2015). Cartesian decomposition and numerical radius inequalities. Linear Algebra and its Applications. 471. 46–53. 56 indexed citations
6.
Moslehian, Mohammad Sal, et al.. (2014). Some generalized numerical radius inequalities for Hilbert space operators. Linear Algebra and its Applications. 470. 216–227. 51 indexed citations
7.
Yamazaki, Takeaki. (2013). A brief introduction of the Karcher mean (Research on structures of operators via methods in geometry and probability theory). Kyoto University Research Information Repository (Kyoto University). 1839. 31–39. 1 indexed citations
8.
Lim, Yongdo & Takeaki Yamazaki. (2012). On some inequalities for the matrix power and Karcher means. Linear Algebra and its Applications. 438(3). 1293–1304. 18 indexed citations
9.
Seo, Yūki, et al.. (2011). Geometric properties of positive definite matrices cone with respect to the Thompson metric. Linear Algebra and its Applications. 435(8). 2054–2064. 2 indexed citations
10.
Lim, Yongdo, et al.. (2011). Multi-variable weighted geometric means of positive definite matrices. Linear Algebra and its Applications. 435(2). 307–322. 13 indexed citations
11.
Yamazaki, Takeaki. (2011). An elementary proof of arithmetic–geometric mean inequality of the weighted Riemannian mean of positive definite matrices. Linear Algebra and its Applications. 438(4). 1564–1569. 5 indexed citations
12.
Chō, Muneo, et al.. (2009). ON THE OPERATOR EQUATION AB = zBA. Scientiae mathematicae Japonicae. 69(2). 257–263. 2 indexed citations
13.
Yamazaki, Takeaki, et al.. (2005). ON COMPARISONS OF NORMS AND THE NUMERICAL RANGES OF AN OPERATOR WITH ITS GENERALIZED ALUTHGE TRANSFORMATION. Scientiae mathematicae Japonicae. 62(3). 349–361. 1 indexed citations
14.
Yamazaki, Takeaki, et al.. (2004). On the polar decomposition of the aluthge transformation and related results. Journal of Operator Theory. 51(2). 303–319. 22 indexed citations
15.
Yamazaki, Takeaki. (2002). On numerical range of the Aluthge transformation. Linear Algebra and its Applications. 341(1-3). 111–117. 30 indexed citations
16.
Hashimoto, Masashi, et al.. (2000). Further extensions of characterizations of chaotic order associated with Kantorovich type inequalities (Operator Inequalities and Related Area). Kyoto University Research Information Repository (Kyoto University). 1144. 147–162.
17.
Yamazaki, Takeaki. (1999). Extensions of the results on ρ-hyponormal and log-hyponormal operators by Aluthge and Wang. SUT Journal of Mathematics. 35(1). 3 indexed citations
18.
Yamazaki, Takeaki. (1999). Simplified proof of Tanahashi's result on the best possibility of generalized Furuta inequality. Mathematical Inequalities & Applications. 473–477. 28 indexed citations
19.
Furuta, Takayuki, et al.. (1998). ORDER PRESERVING OPERATOR INEQUALITIES VIA FURUTA INEQUALITY. Mathematica japonica. 48(3). 471–476. 3 indexed citations
20.
Furuta, Takayuki, et al.. (1998). On a conjecture related to Furuta-type inequalities with negative powers. Project Euclid (Cornell University). 9(2). 213–218. 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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