Step
*
1
of Lemma
ravg-dist
1. x : ℝ
2. y : ℝ
3. |ravg(x;y) - x| = ((r1/r(2)) * |y - x|)
4. r(2) = |r(2)|
⊢ |x + -(y)| = |-(x) + y|
BY
{ ((Assert (x + -(y)) = -(-(x) + y) BY Auto) THEN (RWO "-1" 0 THENA Auto)) }
1
1. x : ℝ
2. y : ℝ
3. |ravg(x;y) - x| = ((r1/r(2)) * |y - x|)
4. r(2) = |r(2)|
5. (x + -(y)) = -(-(x) + y)
⊢ |-(-(x) + y)| = |-(x) + y|
Latex:
Latex:
1. x : \mBbbR{}
2. y : \mBbbR{}
3. |ravg(x;y) - x| = ((r1/r(2)) * |y - x|)
4. r(2) = |r(2)|
\mvdash{} |x + -(y)| = |-(x) + y|
By
Latex:
((Assert (x + -(y)) = -(-(x) + y) BY Auto) THEN (RWO "-1" 0 THENA Auto))
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