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ORCIDHiroshi Hirai 0001
Person information
- affiliation: University of Tokyo, Department of Mathematical Informatics, Japan
- affiliation: Kyoto University, Research Institute for Mathematical Sciences, Japan
Other persons with the same name
- Hiroshi Hirai — disambiguation page
- Hiroshi Hirai 0002 — Kyushu University, Fukuoka, Japan
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Journal Articles
- 2023
[j32]Hiroshi Hirai
, Motoki Ikeda:
Node-Connectivity Terminal Backup, Separately Capacitated Multiflow, and Discrete Convexity. SIAM J. Discret. Math. 37(1): 351-378 (2023)- 2022
- [j31]Hiroshi Hirai, Yuni Iwamasa:
Reconstructing Phylogenetic Trees from Multipartite Quartet Systems. Algorithmica 84(7): 1875-1896 (2022) - [j30]Hiroshi Hirai, Motoki Ikeda:
A cost-scaling algorithm for computing the degree of determinants. Comput. Complex. 31(2): 10 (2022) - [j29]Satoru Fujishige, Hiroshi Hirai:
Compression of M♮-convex functions - Flag matroids and valuated permutohedra. J. Comb. Theory, Ser. A 185: 105525 (2022) - [j28]Hiroshi Hirai, Ryosuke Sato:
Polyhedral Clinching Auctions for Two-Sided Markets. Math. Oper. Res. 47(1): 259-285 (2022) - [j27]Hiroshi Hirai, Yuni Iwamasa:
A combinatorial algorithm for computing the rank of a generic partitioned matrix with 2 ˟ 2 submatrices. Math. Program. 195(1): 1-37 (2022) - [j26]Hiroshi Hirai, Motoki Ikeda:
A cost-scaling algorithm for minimum-cost node-capacitated multiflow problem. Math. Program. 195(1): 149-181 (2022) - 2021
- [j25]Hiroshi Hirai, Ryuhei Mizutani:
Minimum 0-extension problems on directed metrics. Discret. Optim. 40: 100642 (2021) - [j24]Masaki Hamada, Hiroshi Hirai:
Computing the nc-Rank via Discrete Convex Optimization on CAT(0) Spaces. SIAM J. Appl. Algebra Geom. 5(3): 455-478 (2021) - 2020
- [j23]Hiroshi Hirai, Ryunosuke Oshiro, Ken'ichiro Tanaka:
Counting Integral Points in Polytopes via Numerical Analysis of Contour Integration. Math. Oper. Res. 45(2): 455-464 (2020) - [j22]Hiroshi Hirai, So Nakashima:
A Compact Representation for Modular Semilattices and Its Applications. Order 37(3): 479-507 (2020) - 2019
- [j21]Hiroshi Hirai:
Uniform semimodular lattices and valuated matroids. J. Comb. Theory, Ser. A 165: 325-359 (2019) - [j20]Hiroshi Hirai:
Computing the Degree of Determinants via Discrete Convex Optimization on Euclidean Buildings. SIAM J. Appl. Algebra Geom. 3(3): 523-557 (2019) - [j19]Hiroshi Hirai:
A Dual Descent Algorithm for Node-capacitated Multiflow Problems and Its Applications. ACM Trans. Algorithms 15(1): 15:1-15:24 (2019) - [j18]Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivný:
A Tractable Class of Binary VCSPs via M-Convex Intersection. ACM Trans. Algorithms 15(3): 44:1-44:41 (2019) - 2018
- [j17]Hiroshi Hirai, Hiroyuki Namba:
Shortest (A+B)-Path Packing Via Hafnian. Algorithmica 80(8): 2478-2491 (2018) - [j16]Hiroshi Hirai, Taihei Oki:
A compact representation for minimizers of k-submodular functions. J. Comb. Optim. 36(3): 709-741 (2018) - 2017
- [j15]Hiroshi Hirai, Masashi Nitta:
On integer network synthesis problem with tree-metric cost. JSIAM Lett. 9: 73-76 (2017) - 2016
- [j14]Hiroshi Hirai:
Discrete convexity and polynomial solvability in minimum 0-extension problems. Math. Program. 155(1-2): 1-55 (2016) - [j13]Hiroshi Hirai, Yuni Iwamasa:
On k-Submodular Relaxation. SIAM J. Discret. Math. 30(3): 1726-1736 (2016) - 2015
- [j12]Hiroshi Hirai:
L-extendable functions and a proximity scaling algorithm for minimum cost multiflow problem. Discret. Optim. 18: 1-37 (2015) - [j11]Hiroshi Hirai, Akihiro Yabe:
A combinatorial formula for principal minors of a matrix with tree-metric exponents and its applications. J. Comb. Theory, Ser. A 133: 261-279 (2015) - 2014
- [j10]Hiroshi Hirai:
The Maximum Multiflow Problems with Bounded Fractionality. Math. Oper. Res. 39(1): 60-104 (2014) - [j9]Hiroshi Hirai, Gyula Pap:
Tree metrics and edge-disjoint S-paths. Math. Program. 147(1-2): 81-123 (2014) - [j8]Mikio Hasegawa, Hiroshi Hirai, Kiyohito Nagano, Hiroshi Harada, Kazuyuki Aihara:
Optimization for Centralized and Decentralized Cognitive Radio Networks. Proc. IEEE 102(3): 574-584 (2014) - 2013
- [j7]Hiroshi Hirai:
Half-integrality of node-capacitated multiflows and tree-shaped facility locations on trees. Math. Program. 137(1-2): 503-530 (2013) - 2012
- [j6]Hiroshi Hirai:
Bounded fractionality of the multiflow feasibility problem for demand graph K3+K3 and related maximization problems. J. Comb. Theory, Ser. B 102(4): 875-899 (2012) - 2011
- [j5]Hiroshi Hirai, Shungo Koichi:
On duality and fractionality of multicommodity flows in directed networks. Discret. Optim. 8(3): 428-445 (2011) - [j4]Hiroshi Hirai:
Folder Complexes and Multiflow Combinatorial Dualities. SIAM J. Discret. Math. 25(3): 1119-1143 (2011) - 2010
- [j3]Hiroshi Hirai:
Metric packing for K3+K3. Comb. 30(3): 295-326 (2010) - 2009
- [j2]Hiroshi Hirai:
Tight spans of distances and the dual fractionality of undirected multiflow problems. J. Comb. Theory, Ser. B 99(6): 843-868 (2009) - 2006
- [j1]Hiroshi Hirai:
A Geometric Study of the Split Decomposition. Discret. Comput. Geom. 36(2): 331-361 (2006)
Conference and Workshop Papers
- 2023
- [c10]Hiroshi Hirai, Harold Nieuwboer, Michael Walter:
Interior-point methods on manifolds: theory and applications. FOCS 2023: 2021-2030 - [c9]Hiroshi Hirai, Ryosuke Sato:
Polyhedral Clinching Auctions for Indivisible Goods. WINE 2023: 366-383 - 2020
- [c8]Hiroshi Hirai, Motoki Ikeda:
Node-Connectivity Terminal Backup, Separately-Capacitated Multiflow, and Discrete Convexity. ICALP 2020: 65:1-65:19 - [c7]Hiroshi Hirai, Yuni Iwamasa:
A Combinatorial Algorithm for Computing the Rank of a Generic Partitioned Matrix with 2 ˟ 2 Submatrices. IPCO 2020: 196-208 - [c6]Hiroshi Hirai, Ryuhei Mizutani:
Minimum 0-Extension Problems on Directed Metrics. MFCS 2020: 46:1-46:13 - 2018
- [c5]Hiroshi Hirai, Yuni Iwamasa:
Reconstructing Phylogenetic Tree From Multipartite Quartet System. ISAAC 2018: 57:1-57:13 - [c4]Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivný:
Beyond JWP: A Tractable Class of Binary VCSPs via M-Convex Intersection. STACS 2018: 39:1-39:14 - 2016
- [c3]Hiroshi Hirai, Taihei Oki:
A Compact Representation for Minimizers of k-Submodular Functions (Extended Abstract). ISCO 2016: 381-392 - 2013
- [c2]Hiroshi Hirai:
Discrete Convexity and Polynomial Solvability in Minimum 0-Extension Problems. SODA 2013: 1770-1788 - 2010
- [c1]Hiroshi Hirai:
The maximum multiflow problems with bounded fractionality. STOC 2010: 115-120
Informal and Other Publications
- 2023
- [i15]Hiroshi Hirai, Ryosuke Sato:
Polyhedral Clinching Auctions for Indivisible Goods. CoRR abs/2303.00231 (2023) - [i14]Hiroshi Hirai, Harold Nieuwboer, Michael Walter:
Interior-point methods on manifolds: theory and applications. CoRR abs/2303.04771 (2023) - [i13]Hiroshi Hirai, Yuni Iwamasa, Taihei Oki, Tasuku Soma:
Algebraic combinatorial optimization on the degree of determinants of noncommutative symbolic matrices. CoRR abs/2310.15502 (2023) - 2020
- [i12]Hiroshi Hirai, Yuni Iwamasa:
A combinatorial algorithm for computing the rank of a generic partitioned matrix with 2×2 submatrices. CoRR abs/2004.10443 (2020) - [i11]Hiroshi Hirai, Ryuhei Mizutani:
Minimum 0-Extension Problems on Directed Metrics. CoRR abs/2006.00153 (2020) - [i10]Hiroshi Hirai, Motoki Ikeda:
Node-Connectivity Terminal Backup, Separately-Capacitated Multiflow, and Discrete Convexity. CoRR abs/2008.10052 (2020) - [i9]Hiroshi Hirai, Motoki Ikeda:
A cost-scaling algorithm for computing the degree of determinants. CoRR abs/2008.11388 (2020) - 2019
- [i8]Hiroshi Hirai, Motoki Ikeda:
A Cost-Scaling Algorithm for Minimum-Cost Node-Capacitated Multiflow Problem. CoRR abs/1909.01599 (2019) - 2018
- [i7]Hiroshi Hirai, Yuni Iwamasa, Kazuo Murota, Stanislav Zivný:
A tractable class of binary VCSPs via M-convex intersection. CoRR abs/1801.02199 (2018) - [i6]Hiroshi Hirai, Ryunosuke Oshiro, Ken'ichiro Tanaka:
Counting Integral Points in Polytopes via Numerical Analysis of Contour Integration. CoRR abs/1807.05348 (2018) - 2017
- [i5]Hiroshi Hirai, Ryosuke Sato:
Polyhedral Clinching Auctions for Two-sided Markets. CoRR abs/1708.04881 (2017) - 2016
- [i4]Hiroshi Hirai, Hiroyuki Namba:
Shortest (A+B)-path packing via hafnian. CoRR abs/1603.08073 (2016) - 2015
- [i3]Hiroshi Hirai, Yuni Iwamasa:
On k-Submodular Relaxation. CoRR abs/1504.07830 (2015) - [i2]Hiyori Yoshikawa, Hiroshi Hirai, Kazuhisa Makino:
A representation of antimatroids by Horn rules and its application to educational systems. CoRR abs/1508.05465 (2015) - [i1]Hiroshi Hirai:
A dual descent algorithm for node-capacitated multiflow problems and its applications. CoRR abs/1508.07065 (2015)
Coauthor Index
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