Step
*
2
of Lemma
square-rleq-implies
1. x : ℝ
2. y : ℝ
3. r0 ≤ y
4. x^2 ≤ y^2
5. (|x| ≤ y)
⇒ (|x|^2 ≤ y^2)
6. |x| ≤ y
⊢ x ≤ y
BY
{ ((Assert x ≤ |x| BY Auto) THEN Auto) }
Latex:
Latex:
1. x : \mBbbR{}
2. y : \mBbbR{}
3. r0 \mleq{} y
4. x\^{}2 \mleq{} y\^{}2
5. (|x| \mleq{} y) {}\mRightarrow{} (|x|\^{}2 \mleq{} y\^{}2)
6. |x| \mleq{} y
\mvdash{} x \mleq{} y
By
Latex:
((Assert x \mleq{} |x| BY Auto) THEN Auto)
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