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Robbert Krebbers authored
We define basic updates as: |==> P := (∀ Q, (P -∗ ■ Q) -∗ ■ Q) From this definitions, we can prove all laws of basic updates, apart from those related to frame preserving updates. For that, we need the following primitive rule: x ~~>: Φ → uPred_ownM x ∗ (∀ y, ⌜Φ y⌝ -∗ uPred_ownM y -∗ ■ R) ⊢ ■ R. So, in total, this gets rid of 1 primitive connective (|==>) and 5 primitive rules (those of `|==>`), which is replaced by one new primitive rule.
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