Definitions array 1 Sections StandardLIB Doc
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Some definitions of interest.
array_segDef a[i..j] == <i,j,2of(2of(a))>
Thm* T:Type, i:j:{i...}, a:[T]Array{i..j}, m:{i..j}, n:{m..j}.
Thm* a[m..n [T]Array{m..n}
p_arrayDef [T]Array{i..j} == {a:[T]Array | a.l = i & a.u = j }
Thm* T:Type{i}, i:j:{i...}. [T]Array{i..j Type{[i']}
int_segDef {i..j} == {k:i  k < j }
Thm* m,n:. {m..n Type
int_upperDef {i...} == {j:ij }
Thm* n:. {n...}  Type

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Definitions array 1 Sections StandardLIB Doc