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Theorem union-subset-inj

⊦ bag ∪ bag1 ⊆ bag ∪ bag2 ↔ bag1 ⊆ bag2

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: 1
Proof steps: 3
Used lemmas: union-com, union-ass, union, count-subset,
Used spec theorems:
- Used simplifier rules: