Step
*
2
of Lemma
rmul-nonzero
1. x : ℝ@i
2. y : ℝ@i
3. (x * y) < r0@i
4. x < r0
⊢ y ≠ r0
BY
{ ((Assert (r1/x) < r0 BY (nRMul ⌜x⌝ 0⋅ THEN Auto)) THEN nRMul ⌜(r1/x)⌝ 3⋅ THEN Auto)⋅ }
Latex:
Latex:
1. x : \mBbbR{}@i
2. y : \mBbbR{}@i
3. (x * y) < r0@i
4. x < r0
\mvdash{} y \mneq{} r0
By
Latex:
((Assert (r1/x) < r0 BY (nRMul \mkleeneopen{}x\mkleeneclose{} 0\mcdot{} THEN Auto)) THEN nRMul \mkleeneopen{}(r1/x)\mkleeneclose{} 3\mcdot{} THEN Auto)\mcdot{}
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