Step
*
1
1
of Lemma
rel-star-iff-rel-plus-or
1. T : Type
2. R : T ⟶ T ⟶ ℙ
3. x : T@i
4. y : T@i
5. n : ℕ@i
6. x R^n y@i
7. n = 0 ∈ ℤ
⊢ x = y ∈ T
BY
{ (((HypSubst' (-1) (-2)) THENM (RecUnfold `rel_exp` (-2))) THEN (Reduce (-2)) THEN Auto) }
Latex:
Latex:
1. T : Type
2. R : T {}\mrightarrow{} T {}\mrightarrow{} \mBbbP{}
3. x : T@i
4. y : T@i
5. n : \mBbbN{}@i
6. x rel\_exp(T; R; n) y@i
7. n = 0
\mvdash{} x = y
By
Latex:
(((HypSubst' (-1) (-2)) THENM (RecUnfold `rel\_exp` (-2))) THEN (Reduce (-2)) THEN Auto)
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