Step
*
1
of Lemma
square-is-zero
1. x : ℝ
2. (x * x) = r0
⊢ x = r0
BY
{ ((BLemma `not-rneq` THEN Auto) THEN (D 0 THENA Auto)) }
1
1. x : ℝ
2. (x * x) = r0
3. x ≠ r0
⊢ False
Latex:
Latex:
1. x : \mBbbR{}
2. (x * x) = r0
\mvdash{} x = r0
By
Latex:
((BLemma `not-rneq` THEN Auto) THEN (D 0 THENA Auto))
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