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Theorem diff-size

⊦ r ∈ h \ rs → (#(h \ rs) ≤ #((h -- r) \ rs) ↔ false)

Type: A user defined theorem
Validity: The proof is valid.
Features: s, ls,
Comment:
Used by:
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 13
Proof steps: 28
Used lemmas: in-diffs, del-notin, rm-size, in-del, diffs-sw, diffs-ins, del-new, write-del, in-alloc, size-alloc, size-write, sanity, exin, diffs-emp,
Used spec theorems:
- Used simplifier rules: