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Theorem n2i-sub

⊦ n ≤ m → n→i(m - n) = n→i(m) - n→i(n)

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: 2
Used lemmas: n2i-add,
Used spec theorems:
- Used simplifier rules: