Step
*
of Lemma
bag-restrict-size-bound
∀[T:Type]. ∀[eq:EqDecider(T)]. ∀[x:T]. ∀[b:bag(T)].
(((#((b|x)) + #((b|¬x))) = #(b) ∈ ℤ) ∧ (#((b|¬x)) ≤ #(b)) ∧ (#((b|x)) ≤ #(b)))
BY
{ (Auto THEN RWO "bag-size-append<" 0 THEN Auto THEN EqCD THEN Auto) }
1
.....subterm..... T:t
1:n
1. T : Type
2. eq : EqDecider(T)
3. x : T
4. b : bag(T)
⊢ ((b|x) + (b|¬x)) = b ∈ bag(T)
Latex:
Latex:
\mforall{}[T:Type]. \mforall{}[eq:EqDecider(T)]. \mforall{}[x:T]. \mforall{}[b:bag(T)].
(((\#((b|x)) + \#((b|\mneg{}x))) = \#(b)) \mwedge{} (\#((b|\mneg{}x)) \mleq{} \#(b)) \mwedge{} (\#((b|x)) \mleq{} \#(b)))
By
Latex:
(Auto THEN RWO "bag-size-append<" 0 THEN Auto THEN EqCD THEN Auto)
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