Hiro‐o Tokunaga

454 total citations
35 papers, 226 citations indexed

About

Hiro‐o Tokunaga is a scholar working on Geometry and Topology, Mathematical Physics and Discrete Mathematics and Combinatorics. According to data from OpenAlex, Hiro‐o Tokunaga has authored 35 papers receiving a total of 226 indexed citations (citations by other indexed papers that have themselves been cited), including 29 papers in Geometry and Topology, 14 papers in Mathematical Physics and 11 papers in Discrete Mathematics and Combinatorics. Recurrent topics in Hiro‐o Tokunaga's work include Algebraic Geometry and Number Theory (27 papers), Advanced Algebra and Geometry (13 papers) and Polynomial and algebraic computation (8 papers). Hiro‐o Tokunaga is often cited by papers focused on Algebraic Geometry and Number Theory (27 papers), Advanced Algebra and Geometry (13 papers) and Polynomial and algebraic computation (8 papers). Hiro‐o Tokunaga collaborates with scholars based in Japan, Spain and Germany. Hiro‐o Tokunaga's co-authors include Enrique Artal Bartolo, José Agustín, Shyūichi Izumiya, Ichiro Shimada, Goo Ishikawa and Hirotaka Ishida and has published in prestigious journals such as Transactions of the American Mathematical Society, Proceedings of the American Mathematical Society and Mathematische Annalen.

In The Last Decade

Hiro‐o Tokunaga

33 papers receiving 181 citations

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Hiro‐o Tokunaga Japan	10	204	118	83	49	38	35	226
Enrique Artal Bartolo Spain	8	188 0.9×	87 0.7×	104 1.3×	56 1.1×	33 0.9×	45	215
Sandra Di Rocco Sweden	9	129 0.6×	48 0.4×	35 0.4×	53 1.1×	85 2.2×	28	184
Nero Budur United States	9	188 0.9×	97 0.8×	67 0.8×	103 2.1×	53 1.4×	29	228
Вик. С. Куликов Russia	10	215 1.1×	126 1.1×	47 0.6×	23 0.5×	17 0.4×	34	244
R. V. Gurjar India	10	222 1.1×	118 1.0×	28 0.3×	56 1.1×	38 1.0×	57	237
F. L. Zak Russia	7	191 0.9×	86 0.7×	33 0.4×	58 1.2×	85 2.2×	12	257
Benjamin Nill Germany	7	113 0.6×	28 0.2×	88 1.1×	43 0.9×	32 0.8×	30	160
Eriko Hironaka United States	8	177 0.9×	134 1.1×	80 1.0×	15 0.3×	53 1.4×	20	200
Masahiko Yoshinaga Japan	10	176 0.9×	77 0.7×	211 2.5×	96 2.0×	53 1.4×	38	274
Narasimha Kumar India	8	190 0.9×	112 0.9×	30 0.4×	131 2.7×	49 1.3×	35	247

Countries citing papers authored by Hiro‐o Tokunaga

Since Specialization

Citations

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

Fields of papers citing papers by Hiro‐o Tokunaga

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hiro‐o Tokunaga. 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 Hiro‐o Tokunaga. The network helps show where Hiro‐o Tokunaga may publish in the future.

Co-authorship network of co-authors of Hiro‐o Tokunaga

This figure shows the co-authorship network connecting the top 25 collaborators of Hiro‐o Tokunaga. A scholar is included among the top collaborators of Hiro‐o Tokunaga 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 Hiro‐o Tokunaga. Hiro‐o Tokunaga 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

Tokunaga, Hiro‐o, et al.. (2025). The realization spaces of certain conic-line arrangements of degree 7. Journal of the Mathematical Society of Japan. -1(-1).

Bartolo, Enrique Artal, et al.. (2023). Torsion divisors of plane curves with maximal flexes and Zariski pairs. Mathematische Nachrichten. 296(6). 2214–2235. 1 indexed citations

Tokunaga, Hiro‐o, et al.. (2020). Elliptic surfaces of rank one and the topology of cubic-line arrangements. Journal of Number Theory. 221. 174–189. 2 indexed citations

Tokunaga, Hiro‐o, et al.. (2020). Zariski tuples for a smooth cubic and its tangent lines. Proceedings of the Japan Academy Series A Mathematical Sciences. 96(2). 3 indexed citations

Tokunaga, Hiro‐o, et al.. (2017). On the topology of arrangements of a cubic and its inflectional tangents. Proceedings of the Japan Academy Series A Mathematical Sciences. 93(6). 6 indexed citations

Tokunaga, Hiro‐o, et al.. (2015). Geometry of bisections of elliptic surfaces and Zariski $$N$$ N -plets for conic arrangements. Geometriae Dedicata. 178(1). 219–237. 12 indexed citations

Tokunaga, Hiro‐o. (2014). Sections of elliptic surfaces and Zariski pairs for conic-line arrangements via dihedral covers. Journal of the Mathematical Society of Japan. 66(2). 15 indexed citations

Tokunaga, Hiro‐o. (2012). Some sections on rational elliptic surfaces and certain special conic-quartic configurations. Kodai Mathematical Journal. 35(1). 5 indexed citations

Tokunaga, Hiro‐o, et al.. (2007). A Note on Embeddings of $S_4$ and $A_5$ into the Two-dimensional Cremona Group and Versal Galois Covers. Publications of the Research Institute for Mathematical Sciences. 43(4). 1111–1123. 3 indexed citations

10.

Agustín, José, et al.. (2007). Pencils and infinite dihedral covers of ℙ². Proceedings of the American Mathematical Society. 136(1). 21–29. 3 indexed citations

11.

Izumiya, Shyūichi, et al.. (2007). Singularity Theory and Its Application. 5 indexed citations

12.

Tokunaga, Hiro‐o. (2005). 2-DIMENSIONAL VERSAL S4-COVERS AND RATIONAL ELLIPTIC SURFACES. 2 indexed citations

13.

Bartolo, Enrique Artal & Hiro‐o Tokunaga. (2004). Zariski k-plets of rational curve arrangements and dihedral covers. Topology and its Applications. 142(1-3). 227–233. 10 indexed citations

14.

Tokunaga, Hiro‐o. (2004). Dihedral covers and an elementary arithmetic on elliptic surfaces. Kyoto journal of mathematics. 44(2). 9 indexed citations

15.

Bartolo, Enrique Artal, et al.. (2004). Pencils and Infinite Dihedral covers of P^2. arXiv (Cornell University). 1–10. 3 indexed citations

16.

Tokunaga, Hiro‐o. (2002). Galois covers for $\mathfrak{S}_4$ and $\mathfrak{A}_4$ and their applications. Osaka Journal of Mathematics. 39(3). 621–645. 1 indexed citations

17.

Bartolo, Enrique Artal & Hiro‐o Tokunaga. (2000). Zariski Pairs of Index 19 and Mordell-Weil Groups of K3 Surfaces. Proceedings of the London Mathematical Society. 80(1). 127–144. 6 indexed citations

18.

Tokunaga, Hiro‐o. (1999). Some examples of Zariski pairs arising from certain elliptic K3 surfaces, II: Degtyarev's conjecture. Mathematische Zeitschrift. 230(2). 389–400. 9 indexed citations

19.

Tokunaga, Hiro‐o. (1997). Dihedral coverings branched along maximizing sextics. Mathematische Annalen. 308(4). 633–648. 8 indexed citations

20.

Tokunaga, Hiro‐o. (1991). Triple coverings of algebraic surfaces according to the Cardano formula. Kyoto journal of mathematics. 31(2). 18 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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