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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | )abbrev category PATAB Patternable
++ Author: Manuel Bronstein
++ Date Created: 29 Nov 1989
++ Date Last Updated: 29 Nov 1989
++ Description:
++ Category of sets that can be converted to useful patterns
++ An object S is Patternable over an object R if S can
++ lift the conversions from R into \spadtype{Pattern(Integer)} and
++ \spadtype{Pattern(Float)} to itself;
Patternable(R) : Category == SIG where
R : Type
SIG ==> with
if R has ConvertibleTo Pattern Integer then
ConvertibleTo Pattern Integer
if R has ConvertibleTo Pattern Float then
ConvertibleTo Pattern Float
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