- K. Hayase and H. Imai, {OBDDs} of a Monotone Function and of Its Prime Implicants,
*Theory of Computing Systems*, 1998, 579--591.

- K. Sekine and H. Imai and K. Imai, Computation of the {Jones} Polynomial,
*Transactions of Japan SIAM*, 1998, 341--354.

- M. Inaba and H. Imai, Geometry Helps Clustering Objects in Text and Image Databases --- Utilizing Geometry of the Vector Space Model foree? Texts and the Feature Space Model for Images,
*Advanced Database Systems for Integration of Media and User Environments'98*, 1998, 15--20.

- K. Imai and S. Sumino and H. Imai, Minimax Geometric Fitting of Two Corresponding Sets of Points and Dynamic Furthest Voronoi Diagrams,
*IEICE Transactions on Information and Systems*,**E81-D**, 1998, 1162--1171.

- Koji Hakata and Hiroshi Imai, Algorithms for the Longest Common Subsequence Problem for Multiple Strings Based on Geometric Maxima,
*Optimization Methods and Software*, 1998, 233--260.

- Keiko Imai and Hiroshi Imai, Dynamic Weighted {Voronoi} Diagrams and Weighted Minimax Matching of Two Corresponding Point Sets,
*Optimization Methods and Software*, 1998, 261--274.

- T. Ikeda and H. Imai, Enhanced {A${}^*$} Algorithms for Multiple Alignments: Optimal Alignments for Several Sequences and $k$-Optee? Approximate Alignments for Large Cases,
*Theoretical Computer Science*, 1999, 341--374.

- T. Shibuya and H. Imai and S. Nishimura and H. Shimoura and K. Tenmoku, Finding Useful Detours in Geographical Databases,
*IEICE Transactions on Information and Systems*,**E82-D**, 1999, 282--290.

- K. Imai and H. Imai and T. Tokuyama, Maximin Location of Convex Objects in a Polygon and Related {Voronoi} Diagrams,
*Journal of the Operations Research Society of Japan*, 1999, 45--58.

- K. Sadakane and H. Imai and K. Onishi and M. Inaba and F. Takeuchi and K. Imai, {Voronoi} Diagrams by Divergences with Additive Weights,
*Proceedings of the 14th Annual ACM Symposium on Computational Geometry*, 1998, 403--404.

- A. Tajima and H. Imai, Computational Investigations of the Optimality of Two- and Three-Dimensional Triangulations under Several Criteria,
*Proceedings of the 10th Canadian Conference on Computational Geometry*, 1998, 44--45.

- M. Inaba and H. Imai, Geometric Clustering Models for Multimedia Databases,
*Proceedings of the 10th Canadian Conference on Computational Geometry*, 1998, 110--111.

- K. Sadakane and H. Imai, A Cooperative Distributed Text Database Management Method Unifying Search and Compression Based on theee? Burrows-Wheeler Transformation,
*Lecture Notes in Computer Science*, 1999, 434--445.

- Akira Tajima, Optimality and Integer Programming Formulations of Triangulations in General Dimensions,
*Lecture Notes in Computer Science*, 1998, 377--386.

- M. Inaba and H. Imai, Geometric Clustering in Feature Space,
*Lecture Notes in Artificial Intelligence*, 1998, 421--422.

- H. Kobayashi and H. Imai, Improvement of the A* Algorithm for Multiple Sequence Alignment,
*Genome Informatics 1998*, 1998, 120--130.

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- M. Inaba and H. Imai, The Number of Partitions of $n$ Points Induced by the {Voronoi} Diagram via the Conjugacy Generated by $k$ Points,
*Proceedings of the 1st Japanese-Hungarian Symposium on Discrete Mathematics and Its Applications*, 1999, 83--90.

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- H. Imai and K. Imai, Computation of Invariants in Computational Algebra and Computational Geometry Using Binary Decision Diagrams,
*Kokyuroku*, 1998, 12--18.

- A. Tajima and H. Imai, Optimality and Integer Programming Formulations of Triangulations in General Dimension,
*Kokyuroku*, 1998, 110-120.

- F. Takeuchi and K. Imai and H. Imai, Polytopes of Linear Programming Relaxation for Triangulations,
*Kokyuroku*, 1998, 121--133.

- H. Kobayashi and H. Imai, Improvement of the {A}${}^*$ Algorithm for Multiple Sequence Alignment,
*Modeling and Algorithms 12''*, 1998, 58--69.

- K. Onishi and M. Inaba and K. Sadakane and H. Imai, {Voronoi} Diagrams and Geometric Clustering in the Dually Flat Space,
*Modeling and Algorithms 12''*, 1998, 86--90.

- A. Tajima and H. Imai, Optimality and Integer Programming Formulations of Triangulations,
*Modeling and Algorithms 12''*, 1998, 130--140.

- Y. Asano and H. Imai, Practical Evaluation of a Linear-Time Algorithm for the Single Source Shortest Path Problem {(SSSP)},
*IPSJ SIG Notes*,**SIGAL-62-1**, 1998, .

- M. Endoh and H. Imai, Experimental Analysis and Extensions of Algorithms for Nearest Neighbor Search in High Dimensions,
*IPSJ SIG Notes*,**SIGAL-62-6**, 1998, .

- K. Takahashi, Investigation of the Multiple Polynomial General Number Field Sieve,
*IPSJ SIG Notes*,**SIGAL-62-11**, 1998, .

- A. Tajima and H. Imai, Optimality and Integer Programming Formulations of Triangulations,
*IPSJ SIG Notes*,**SIGAL-63-4**, 1998, .

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- M. Endoh and H. Imai, Practical Issues of Nearest Neighbor Search Methods Using Neighbor Graphs in High-Dimensional Feature Space,
*IPSJ SIG Notes*,**SIGDBS-116-67**, 1998, .

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