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Proof step 1 from proof stream-fin-forward (conclusion)

⊦ finp(σ) → (∃ x. ⌜x⌝ = σ)

User applied rule insert rewrite lemma

And obtained the following new goals

Rule argument

spec: stream-basic inst: name: ex seq: ⊦ finp(σ) ↔ (∃ x. σ = ⌜x⌝ ) subst: [σ] → [σ] flags: rewrite, current

Additional information

Used simplifier rules: inj-02: ⊦ ⌜x⌝ = ⌜x0⌝ ↔ x = x0; Used terms: σ