Step
*
of Lemma
qmax-list-bounds
No Annotations
∀L:ℚ List
(0 < ||L||
⇒ (∀x:ℚ
((qmax-list(L) ≤ x
⇐⇒ (∀y∈L.y ≤ x))
∧ (x ≤ qmax-list(L)
⇐⇒ (∃y∈L. x ≤ y))
∧ (qmax-list(L) < x
⇐⇒ (∀y∈L.y < x))
∧ (x < qmax-list(L)
⇐⇒ (∃y∈L. x < y)))))
BY
{ (RepeatFor 3 ((D 0 THENA Auto)) THEN SplitAndConcl) }
1
1. L : ℚ List
2. 0 < ||L||
3. x : ℚ
⊢ qmax-list(L) ≤ x
⇐⇒ (∀y∈L.y ≤ x)
2
1. L : ℚ List
2. 0 < ||L||
3. x : ℚ
⊢ x ≤ qmax-list(L)
⇐⇒ (∃y∈L. x ≤ y)
3
1. L : ℚ List
2. 0 < ||L||
3. x : ℚ
⊢ qmax-list(L) < x
⇐⇒ (∀y∈L.y < x)
4
1. L : ℚ List
2. 0 < ||L||
3. x : ℚ
⊢ x < qmax-list(L)
⇐⇒ (∃y∈L. x < y)
Latex:
Latex:
No Annotations
\mforall{}L:\mBbbQ{} List
(0 < ||L||
{}\mRightarrow{} (\mforall{}x:\mBbbQ{}
((qmax-list(L) \mleq{} x \mLeftarrow{}{}\mRightarrow{} (\mforall{}y\mmember{}L.y \mleq{} x))
\mwedge{} (x \mleq{} qmax-list(L) \mLeftarrow{}{}\mRightarrow{} (\mexists{}y\mmember{}L. x \mleq{} y))
\mwedge{} (qmax-list(L) < x \mLeftarrow{}{}\mRightarrow{} (\mforall{}y\mmember{}L.y < x))
\mwedge{} (x < qmax-list(L) \mLeftarrow{}{}\mRightarrow{} (\mexists{}y\mmember{}L. x < y)))))
By
Latex:
(RepeatFor 3 ((D 0 THENA Auto)) THEN SplitAndConcl)
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