Step
*
2
of Lemma
radd-of-nonneg-is-zero
1. a : {x:ℝ| r0 ≤ x}
2. b : {x:ℝ| r0 ≤ x}
3. (a + b) = r0
⊢ b ≤ r0
BY
{ (nRAdd ⌜-(a)⌝ (-1)⋅ THEN (RWO "-1" 0 THENA Auto) THEN nRAdd ⌜a⌝ 0⋅ THEN Auto) }
Latex:
Latex:
1. a : \{x:\mBbbR{}| r0 \mleq{} x\}
2. b : \{x:\mBbbR{}| r0 \mleq{} x\}
3. (a + b) = r0
\mvdash{} b \mleq{} r0
By
Latex:
(nRAdd \mkleeneopen{}-(a)\mkleeneclose{} (-1)\mcdot{} THEN (RWO "-1" 0 THENA Auto) THEN nRAdd \mkleeneopen{}a\mkleeneclose{} 0\mcdot{} THEN Auto)
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