| 257 | -- | 263 | Hiroyuki Okazaki. Posterior Probability on Finite Set |
| 265 | -- | 269 | Na Ma, Xiquan Liang. Basic Properties of Primitive Root and Order Function |
| 271 | -- | 274 | Hideki Sakurai, Hiroyuki Okazaki, Yasunari Shidama. Banach's Continuous Inverse Theorem and Closed Graph Theorem |
| 275 | -- | 280 | Yuichi Futa, Hiroyuki Okazaki, Yasunari Shidama. Free ℤ-module |
| 281 | -- | 290 | Artur Kornilowicz. Cayley-Dickson Construction |
| 291 | -- | 301 | Keiichi Miyajima, Artur Kornilowicz, Yasunari Shidama. Contracting Mapping on Normed Linear Space |
| 303 | -- | 307 | Artur Kornilowicz. Products in Categories without Uniqueness of cod and dom |
| 309 | -- | 341 | Grzegorz Bancerek. Program Algebra over an Algebra |
| 343 | -- | 347 | Kenichi Arai, Hiroyuki Okazaki, Yasunari Shidama. Isomorphisms of Direct Products of Finite Cyclic Groups |
| 349 | -- | 357 | Yasushige Watase, Noboru Endou, Yasunari Shidama. On L1 Space Formed by Complex-Valued Partial Functions |