Implementing Bounded Revision via Lexicographic Revision and C-revision

Authors: Meliha Sezgin, Gabriele Kern-Isberner

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Reproducibility Variable Result LLM Response
Research Type Theoretical We show that Bounded Revision can be characterized by three simple, yet elegant postulates and corresponds to a special case of a lexicographic revision, which inherits all relevant features of BR. Furthermore, we present methodological implementations of BR including conditional revision with c-revisions, making it directly usable for conditional revision tools. We state the following representation theorem, which proves that ϕα,β displays the right choice to characterize the change mechanism of BR by β w.r.t. α. Theorem 1 (Representation Theorem for BR). Theorem 2. Let be a plausibilistic TPO, αβ be a BR operator by β w.r.t. α and ℓbe a lexicographic revision operator. For αβ and ℓϕα,β with ϕα,β being the core of BR by β w.r.t. α, it holds that ω ( αβ) ω iff ω ( ℓϕα,β) ω . Theorem 3. Let κ be a ranking function and κ α β = κ α,β as defined in (9). Then (BR1) (BR3) hold for the corresponding plausibilistic TPOs κ and κ α,β. Theorem 4. Let κ be a ranking function. For the minimal c-revision κ c Φα,β = κc α,β as defined in (13) and κ α β = κ α,β from (9), it holds that the corresponding plausibilistic TPOs κc α,β and κ α,β are the same, i.e., ω κc α,β ω iff ω κ α,β ω .
Researcher Affiliation Academia Meliha Sezgin, Gabriele Kern-Isberner TU Dortmund University, Germany meliha.sezgin@tu-dortmund.de, gabriele.kern-isberner@tu-dortmund.de
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