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Theorem sub

j ≤ i, 0 ≤ j ⊦ i→n(i - j) = i→n(i) - i→n(j)

Type: A user defined theorem
Validity: The proof is valid.
Features: localsimp,
Comment:
Used by: abs-pred, abs-pred-02, abs-succ-02, i2np, labsp, ls-fin-add, rax-01,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 1
Proof steps: 4
Used lemmas: add-01,
Used spec theorems:
- Used simplifier rules: