On the Representation of Semigroups and Other Congruences in the Lambda Calculus
Author(s) -
Rick Statman
Publication year - 2016
Publication title -
electronic notes in theoretical computer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.242
H-Index - 60
ISSN - 1571-0661
DOI - 10.1016/j.entcs.2016.09.044
Subject(s) - monoid , semigroup , mathematics , congruence relation , church encoding , combinatory logic , pointwise , lambda calculus , simply typed lambda calculus , free monoid , typed lambda calculus , representation (politics) , system f , algebra over a field , confluence , inverse semigroup , pure mathematics , discrete mathematics , computer science , politics , political science , law , mathematical analysis , programming language
We show that every semigroup with an RE word problem can be pointwise represented in the lambda calculus. In addition, we show that the free monoid generated by an arbitrary RE subset of combinators can be represented as the monoid of all terms which fix a finite set of points
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