時制と時区間を表現する複様相論理とその決定可能性

  • 吉岡 卓
    日本大学文理学部情報科学研究所
  • 東条 敏
    北陸先端科学技術大学院大学情報科学研究科

書誌事項

タイトル別名
  • Many-dimensional Modal Logic of Tense and Temporal Interval and its Decidability
  • ジセイ ト ジクカン オ ヒョウゲン スル フクヨウソウ ロンリ ト ソノ ケッテイ カノウセイ

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抄録

Linear tense logics are widely accepted for structural temporal representation, where the basic KT has two modal operators G and H, each of which represents the future and the past, respectively. On the other hand, the temporal interval relations arranged by Allen have long been the standard of natural language semantics, though it still lacks the modal-logical foundation. Van Benthem proposed ∉up and ∉down in regard to the accessibility to overlapping intervals and subintervals, respectively; however, the logical feature of the modality has not well studied. In this study, we propose a many-dimensional logic including the conventional tense logic, together with such interval accessibility. And, we show that our logic provide a formal apparatus for a precise aspectual classification. Lastly, we introduce the sequent system for our logic. We show the subformula property holds in our system, and thus would be able to show the decidability.

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