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Theorem le-addex

⊦ m ≤ n ↔ (∃ n0. m + n0 = n)

Type: A user defined theorem
Validity: The proof is valid.
Features:
Comment:
Used by: le-add-02,
Used by units in proved state:
Proof exists?: Yes

View the proof

Infos about the proof

Proved?: Yes
Interactions: 3
Proof steps: 6
Used lemmas: lez-01, le-rec, lep,
Used spec theorems:
- nat-basic2/addex
Used simplifier rules: