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<h2>HO-Core</h2>
<pre class="prettyprint lang-smtlib">
(theory HO-Core
:smt-lib-version 2.7
:smt-lib-release "2025-02-05"
:written-by "Clark Barrett, Pascal Fontaine, and Cesare Tinelli"
:date "2025-02-05"
:last-updated "2025-02-05"
:update-history
:sorts ( (-> 2 :right-assoc) )
:funs ( (par (A B) (_ (-> A B :left-assoc) A B) ) )
:definition
"For every expanded signature Sigma, the instance of HO-Core with that signature
is the theory consisting of all Sigma-models in which:
- the sort constructor -> denotes the map sort constructor, that is,
for all sorts s1, s2 in Sigma, (-> s1 s2) denotes the full space of
total functions from the domain denoted by s1 to the domain denoted by s2
- for all sorts s1, s2 in Sigma,
(_ (-> s1 s2) s1 s2)
denotes the function that returns the result of applying its first argument
to its second.
"
:notes
"Because of the semantics of -> the theory has extensionality, that is,
for all sorts s1 and s2, the following formula holds:
(forall ((f (-> s1 s2)) (g (-> s1 s2)))
(= (= f g) (forall ((x s1)) (= (f x) (g x)))))
"
:values
"For all sorts s1, s2, the set of values for the sort (-> s1 s2) consists of
- an abstract value for each map (from a countable subset of the maps)
of type s1 -> s2;
- terms of the form (lambda ((x s1)) t) where t has sort s2 when every
free occurrence of x in t has sort s1.
"
)
</pre>
(<a href="Theories/HO-Core.smt2">raw file</a>)
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