matita/matita/contribs/lambda_delta/Basic_2/computation/lcprs_cprs.ma

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  14
  15 include "Basic_2/reducibility/lcpr_cpr.ma".
  16 include "Basic_2/computation/cprs.ma".
  17 include "Basic_2/computation/lcprs.ma".
  18
  19 (* CONTEXT-SENSITIVE PARALLEL COMPUTATION ON LOCAL ENVIRONMENTS *************)
  20
  21 (* Advanced properties ******************************************************)
  22
  23 lemma lcprs_pair_dx: ∀I,L1,L2. L1 ⊢ ➡ L2 → ∀V1,V2. L2 ⊢ V1 ➡* V2 →
  24                      L1. ⓑ{I} V1 ⊢ ➡* L2. ⓑ{I} V2.
  25 #I #L1 #L2 #HL12 #V1 #V2 #H @(cprs_ind … H) -V2
  26 /3 width=1/ /3 width=5/
  27 qed.