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Theorem sub-two
⊦ ∅ ++ a ++ b ⊆ ∅ ++ c ↔ a = b ∧ a = c
Type: A user defined theorem
Validity: The proof is valid.
Features: simp, localsimp,
Comment:
Used by:
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:
sub-add-03
,
in-04
,
sub-one-02
,
add-01
,
Used spec theorems:
Used simplifier rules: