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basic_2: stronger supclosure allows better inversion lemmas
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14
15 include "basic_2/static/lfxs_length.ma".
16 include "basic_2/static/lfeq.ma".
17
18 (* EQUIVALENCE FOR LOCAL ENVIRONMENTS ON REFERRED ENTRIES *******************)
19
20 (* Forward lemmas with length for local environments ************************)
21
22 lemma lfeq_fwd_length: ∀L1,L2,T. L1 ≡[T] L2 → |L1| = |L2|.
23 /2 width=3 by lfxs_fwd_length/ qed-.