Algebra is the area of study that abstracts the relationship between objects and the operations performed on them, and is the basis for the analysis of all kinds of mathematical phenomena.
Fields of study ; Number theory, algebraic number theory, arithmetic geometry, transcendental number theory, automorphic representations, Iwasawa theory, zeta functions, p-adic cohomology
| Research | : | Number theory, Iwasawa theory, p-adic cohomology |
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| Office | : | 14-745 |
| Tel | : | ext.42759 |
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| URL | : | http://www.math.keio.ac.jp/~kurihara/index.htm |

| Research | : | Automorphic representations |
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| Office | : | 14-739 |
| Tel | : | ext.42744 |
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| URL | : | http://www.math.keio.ac.jp/~miyazaki/ |

| Research | : | Number theory, arithmetic geometry |
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| Office | : | 14-443 |
| Tel | : | ext.42763 |
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| URL | : | http://www.math.keio.ac.jp/~bannai/en/ |

| Research | : | Transcendental number theory |
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| Office | : | 14-441 |
| Tel | : | ext.42741 |
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