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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | )abbrev category ELTAB Eltable
++ Author: Michael Monagan; revised by Manuel Bronstein and Manuel Bronstein
++ Date Created: August 87 through August 88
++ Date Last Updated: April 1991
++ Description:
++ An eltable over domains D and I is a structure which can be viewed
++ as a function from D to I. Examples of eltable structures range from
++ data structures, For example, those of type List, to algebraic
++ structures like Polynomial.
Eltable(S,Index) : Category == SIG where
S : SetCategory
Index : Type
SIG ==> with
elt : (%, S) -> Index
++ elt(u,i) (also written: u . i) returns the element of u indexed by i.
++ Error: if i is not an index of u.
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