Require Import WeakFunctorCategory.
Require Import SmallSMMEs.
+(*
+ * Technically reifications form merely a *semicategory* (no identity
+ * maps), but one can always freely adjoin identity maps (and nothing
+ * else) to a semicategory to get a category whose non-identity-map
+ * portion is identical to the original semicategory (closing under
+ * composition after putting in the identity maps never produces any
+ * additional maps)
+ *
+ * Also, technically this category has ALL enrichments (not just the
+ * surjective monic monoidal ones), though there maps OUT OF only the
+ * surjective enrichments and INTO only the monic monoidal
+ * enrichments. It's a big pain to do this in Coq, but sort of might
+ * matter in real life: a language with really severe substructural
+ * restrictions might fail to be monoidally enriched, meaning we can't
+ * use it as a host language. But that's for the next paper...
+ *)
Inductive ReificationOrIdentity : SMMEs -> SMMEs -> Type :=
| roi_id : forall smme:SMMEs, ReificationOrIdentity smme smme
| roi_reif : forall s1 s2:SMMEs, Reification s1 s2 (mon_i s2) -> ReificationOrIdentity s1 s2.
Reification s0 s1 (mon_i s1) -> Reification s1 s2 (mon_i s2) -> Reification s0 s2 (mon_i s2).
intros.
refine
- {| reification_rstar := MonoidalFunctorsCompose _ _ _ _ _ (reification_rstar X) (reification_rstar X0)
+ {| reification_rstar_f := reification_rstar_f X >>>> reification_rstar_f X0
+ ; reification_rstar := MonoidalFunctorsCompose _ _ _ _ _ (reification_rstar X) (reification_rstar X0)
; reification_r := fun K => (reification_r X K) >>>> (reification_r X0 (mon_i s1))
|}.
intro K.
- set (ni_associativity (reification_r X K) (reification_r X0 (mon_i s1)) (RepresentableFunctor s2 (mon_i s2))) as q.
+ set (ni_associativity (reification_r X K) (reification_r X0 (mon_i s1)) (HomFunctor s2 (mon_i s2))) as q.
eapply ni_comp.
apply q.
clear q.
set (reification_commutes X K) as comm1.
set (reification_commutes X0 (mon_i s1)) as comm2.
- set (RepresentableFunctor s0 K) as a in *.
+ set (HomFunctor s0 K) as a in *.
set (reification_rstar_f X) as a' in *.
set (reification_rstar_f X0) as x in *.
set (reification_r X K) as b in *.
set (reification_r X0 (mon_i s1)) as c in *.
- set (RepresentableFunctor s2 (mon_i s2)) as c' in *.
- set (RepresentableFunctor s1 (mon_i s1)) as b' in *.
+ set (HomFunctor s2 (mon_i s2)) as c' in *.
+ set (HomFunctor s1 (mon_i s1)) as b' in *.
apply (ni_comp(F2:=b >>>> (b' >>>> x))).
apply (@ni_respects _ _ _ _ _ _ _ _ _ _ b _ b _ (c >>>> c') _ (b' >>>> x)).
apply ni_id.