H∞+BUC does not have the best approximation property
نویسندگان
چکیده
منابع مشابه
Common knowledge does not have the Beth property
Common knowledge is an essential notion for coordination among agents. We show that the logic of common knowledge does not have the Beth property and thus it also lacks interpolation. The proof we present is a variant of Maksimova’s proof that temporal logics with ‘the next’ do not have the Beth property. Our result also provides an explanation why it is so difficult to find ‘nice’ deductive sy...
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ژورنال
عنوان ژورنال: Arkiv för Matematik
سال: 1984
ISSN: 0004-2080
DOI: 10.1007/bf02384384