セミナー情報
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2014年 4月28日(月)〜5月2日(金)
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4月28日(月) |
■整数論セミナー 13:30--15:00【会場:合同A棟801(2)】
休み
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4月29日(火) |
■幾何セミナー 15:00--16:30【会場:数学棟209】
祝日(昭和の日)
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5月1日(木) |
■応用数学セミナー 16:00--17:30【会場:合同A棟303】
休み
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5月2日(金)
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■ロジックセミナー16:00-- 【会場:合同棟1201】
講演者:村上 翔太 氏(東北大学大学院理学研究科)
題目: A generalization of weak Ramseyan factorization
【概要】
In the recent study of reverse mathematics, the strength of
(logically) weak statements, especially Ramsey's theorem for pairs
(RT22), has been studied by many researchers. In a joint work with T.
Yamazaki and K. Yokoyama, we found a theorem equivalent to RT22, which
is called Ramseyan factorization theorem for pairs. We also proved that
a weaker version of Ramseyan factorization theorem is in between CAC and
ADS, both strictly weaker than RT22. In this talk, we introduce a
natural generalization of weak Ramseyan factorization theorem and
discuss it's strength.
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