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Theorem del-addin-01

⊦ ¬ a ∈ s → (a ∈ (s -- b) ++ c ↔ a = c)

Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by: del-addin,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 1
Used lemmas: del-rax,
Used spec theorems:
- Used simplifier rules:
  - infset-basic/rax
  - infset-basic/in-02