[Imprint][Data Privacy Statement][E-Mail]



View long theorem info. View the proof. Back to main index. View the specification. View theorem base summary, View theorem base listing, the used properties by spec, the dependency list, the symbol table,

Proof step 3 from proof restrict-at (previous step)

a ∈ st, a ∈ s ⊦ # s = 0, (st \ (dom st \ s))[a] = st[a], s = ∅

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: <toplevel> name: Diff-get seq: ⊦ ¬ a ∈ s → (st \ s)[a] = st[a] subst: [a, s, st] → [a, dom st \ s, st] flags: <all paths>

Additional information

Used simplifier rules: Diff-mems-get: ⊦ a ∈ s → (st \ s)[a] = (∅)[a];%Dom: ⊦ a ∈ dom st ↔ a ∈ st;% ⊦ a ∈ s1 \ s2 ↔ a ∈ s1 ∧ ¬ a ∈ s2; (ws) Used terms: a, dom st \ s, st