Step
*
of Lemma
rabs-strict-ub
No Annotations
∀a:ℝ. ((r0 ≤ a)
⇒ (∀x:ℝ. (a < |x|
⇐⇒ (a < x) ∨ (a < -(x)))))
BY
{ Auto }
1
1. a : ℝ
2. r0 ≤ a
3. x : ℝ
4. a < |x|
⊢ (a < x) ∨ (a < -(x))
2
1. a : ℝ
2. r0 ≤ a
3. x : ℝ
4. (a < x) ∨ (a < -(x))
⊢ a < |x|
Latex:
Latex:
No Annotations
\mforall{}a:\mBbbR{}. ((r0 \mleq{} a) {}\mRightarrow{} (\mforall{}x:\mBbbR{}. (a < |x| \mLeftarrow{}{}\mRightarrow{} (a < x) \mvee{} (a < -(x)))))
By
Latex:
Auto
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