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X-WR-CALNAME:SECURITY & APPLIED LOGIC
X-ORIGINAL-URL:https://sal.cs.unibuc.ro
X-WR-CALDESC:Events for SECURITY & APPLIED LOGIC
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DTSTART:20180101T000000
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BEGIN:VEVENT
DTSTART;TZID=UTC:20190516T100000
DTEND;TZID=UTC:20190516T120000
DTSTAMP:20260404T125258
CREATED:20190506T043334Z
LAST-MODIFIED:20190514T093157Z
UID:406-1558000800-1558008000@sal.cs.unibuc.ro
SUMMARY:An introduction to hybrid-dynamic first-order logic
DESCRIPTION:Speaker:  Ionuţ Ţuţu (Royal Holloway\, University of London) \n\nAbstract: We propose a hybrid-dynamic first-order logic as a formal\nfoundation for specifying and reasoning about reconfigurable\nsystems. As the name suggests\, the formalism we develop extends\n(many-sorted) first-order logic with features that are common to\nhybrid and to dynamic logics. This provides certain key advantages for\ndealing with reconfiguration\, such as: (a) a signature of nominals\,\nincluding operation and relation symbols\, that allows references to\nspecific possible worlds / system configurations – as in the case of\nhybrid logics; (b) distinguished signatures of rigid and flexible\nsymbols\, where the rigid symbols are interpreted uniformly across\npossible worlds – this supports a rigid form of quantification\, which\nensures that variables have the same interpretation regardless of the\npossible world where they are evaluated; (c) hybrid terms\, which\nincrease the expressive power of the logic in the context of rigid\nsymbols; and (d) modal operators over dynamic-logic actions\, which are\ndefined as regular expressions over binary nominal relations. In this\ncontext\, we advance a notion of hybrid-dynamic Horn clause and develop\na series of results that lead to an initial-semantics theorem for the\nHorn-clause fragment of hybrid-dynamic first-order logic.
URL:https://sal.cs.unibuc.ro/event/good-for-a-conclusion-not-good-enough-for-a-premise-natural-language-reasoning-and-the-logic-of-vagueness/
LOCATION:Facultatea de Matematica si Informatica\, sala 202
CATEGORIES:Logic Seminar
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