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4 (* ||A|| A project by Andrea Asperti *)
6 (* ||I|| Developers: *)
7 (* ||T|| The HELM team. *)
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15 include "static_2/notation/relations/stareq_3.ma".
16 include "static_2/syntax/cext2.ma".
17 include "static_2/syntax/teqx.ma".
19 (* EXTENDED SORT-IRRELEVANT EQUIVALENCE *************************************)
21 definition teqx_ext: relation bind ≝
24 definition cdeq: relation3 lenv term term ≝
27 definition cdeq_ext: relation3 lenv bind bind ≝
31 "context-free sort-irrelevant equivalence (binder)"
32 'StarEq I1 I2 = (teqx_ext I1 I2).
35 "context-dependent sort-irrelevant equivalence (term)"
36 'StarEq L T1 T2 = (cdeq L T1 T2).
39 "context-dependent sort-irrelevant equivalence (binder)"
40 'StarEq L I1 I2 = (cdeq_ext L I1 I2).