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Theorem intdel-empty

⊦ (s -- a) ∩ s0 ≠ ∅ → s ∩ s0 ≠ ∅

Type: A user defined theorem
Validity: The proof is valid.
Features: forward, localforward,
Comment:
Used by: intersect-empty-rem,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 0
Proof steps: 2
Used lemmas: Delete, int-c, int-a, int-rax,
Used spec theorems:
- Used simplifier rules: