Step
*
of Lemma
qneginv-positive
∀[v:ℚ]. 0 < (-1/v) supposing v < 0
BY
{ xxx(Auto
THEN (FLemma `qinv-negative` [-1] THENA Auto)
THEN (FLemma `qless-minus` [-1] THEN Auto THEN (Reduce (-1)) THEN NthHypEq (-1) THEN EqCD THEN Auto)⋅)xxx }
1
.....subterm..... T:t
2:n
1. v : ℚ
2. v < 0
3. (1/v) < 0
4. 0 < -((1/v))
⊢ (-1/v) = -((1/v)) ∈ ℚ
Latex:
Latex:
\mforall{}[v:\mBbbQ{}]. 0 < (-1/v) supposing v < 0
By
Latex:
xxx(Auto
THEN (FLemma `qinv-negative` [-1] THENA Auto)
THEN (FLemma `qless-minus` [-1]
THEN Auto
THEN (Reduce (-1))
THEN NthHypEq (-1)
THEN EqCD
THEN Auto)\mcdot{})xxx
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