X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Fdrops_drops.ma;fp=matita%2Fmatita%2Fcontribs%2Flambdadelta%2Fbasic_2%2Frelocation%2Fdrops_drops.ma;h=0000000000000000000000000000000000000000;hb=ff612dc35167ec0c145864c9aa8ae5e1ebe20a48;hp=8549cf02a7e01f280f3e71ae656986b9a1056ca3;hpb=222044da28742b24584549ba86b1805a87def070;p=helm.git diff --git a/matita/matita/contribs/lambdadelta/basic_2/relocation/drops_drops.ma b/matita/matita/contribs/lambdadelta/basic_2/relocation/drops_drops.ma deleted file mode 100644 index 8549cf02a..000000000 --- a/matita/matita/contribs/lambdadelta/basic_2/relocation/drops_drops.ma +++ /dev/null @@ -1,133 +0,0 @@ -(**************************************************************************) -(* ___ *) -(* ||M|| *) -(* ||A|| A project by Andrea Asperti *) -(* ||T|| *) -(* ||I|| Developers: *) -(* ||T|| The HELM team. *) -(* ||A|| http://helm.cs.unibo.it *) -(* \ / *) -(* \ / This file is distributed under the terms of the *) -(* v GNU General Public License Version 2 *) -(* *) -(**************************************************************************) - -include "basic_2/relocation/lifts_lifts_bind.ma". -include "basic_2/relocation/drops_weight.ma". - -(* GENERIC SLICING FOR LOCAL ENVIRONMENTS ***********************************) - -(* Main properties **********************************************************) - -(* Basic_2A1: includes: drop_conf_ge drop_conf_be drop_conf_le *) -theorem drops_conf: ∀b1,f1,L1,L. ⬇*[b1, f1] L1 ≘ L → - ∀b2,f,L2. ⬇*[b2, f] L1 ≘ L2 → - ∀f2. f1 ⊚ f2 ≘ f → ⬇*[b2, f2] L ≘ L2. -#b1 #f1 #L1 #L #H elim H -f1 -L1 -L -[ #f1 #_ #b2 #f #L2 #HL2 #f2 #Hf12 elim (drops_inv_atom1 … HL2) -b1 -HL2 - #H #Hf destruct @drops_atom - #H elim (after_inv_isid3 … Hf12) -Hf12 /2 width=1 by/ -| #f1 #I1 #K1 #K #_ #IH #b2 #f #L2 #HL2 #f2 #Hf elim (after_inv_nxx … Hf) -Hf [2,3: // ] - #g #Hg #H destruct /3 width=3 by drops_inv_drop1/ -| #f1 #I1 #I #K1 #K #_ #HI1 #IH #b2 #f #L2 #HL2 #f2 #Hf elim (after_inv_pxx … Hf) -Hf [1,3: * |*:// ] - #g2 #g #Hf #H1 #H2 destruct - [ elim (drops_inv_skip1 … HL2) -HL2 /3 width=6 by drops_skip, liftsb_div3/ - | /4 width=3 by drops_inv_drop1, drops_drop/ - ] -] -qed-. - -(* Basic_1: was: drop1_trans *) -(* Basic_2A1: includes: drop_trans_ge drop_trans_le drop_trans_ge_comm - drops_drop_trans -*) -theorem drops_trans: ∀b1,f1,L1,L. ⬇*[b1, f1] L1 ≘ L → - ∀b2,f2,L2. ⬇*[b2, f2] L ≘ L2 → - ∀f. f1 ⊚ f2 ≘ f → ⬇*[b1∧b2, f] L1 ≘ L2. -#b1 #f1 #L1 #L #H elim H -f1 -L1 -L -[ #f1 #Hf1 #b2 #f2 #L2 #HL2 #f #Hf elim (drops_inv_atom1 … HL2) -HL2 - #H #Hf2 destruct @drops_atom #H elim (andb_inv_true_dx … H) -H - #H1 #H2 lapply (after_isid_inv_sn … Hf ?) -Hf - /3 width=3 by isid_eq_repl_back/ -| #f1 #I1 #K1 #K #_ #IH #b2 #f2 #L2 #HL2 #f #Hf elim (after_inv_nxx … Hf) -Hf - /3 width=3 by drops_drop/ -| #f1 #I1 #I #K1 #K #_ #HI1 #IH #b2 #f2 #L2 #HL2 #f #Hf elim (after_inv_pxx … Hf) -Hf [1,3: * |*: // ] - #g2 #g #Hg #H1 #H2 destruct - [ elim (drops_inv_skip1 … HL2) -HL2 /3 width=6 by drops_skip, liftsb_trans/ - | /4 width=3 by drops_inv_drop1, drops_drop/ - ] -] -qed-. - -theorem drops_conf_div: ∀f1,L,K. ⬇*[Ⓣ,f1] L ≘ K → ∀f2. ⬇*[Ⓣ,f2] L ≘ K → - 𝐔⦃f1⦄ → 𝐔⦃f2⦄ → f1 ≡ f2. -#f1 #L #K #H elim H -f1 -L -K -[ #f1 #Hf1 #f2 #Hf2 elim (drops_inv_atom1 … Hf2) -Hf2 - /3 width=1 by isid_inv_eq_repl/ -| #f1 #I #L #K #Hf1 #IH #f2 elim (pn_split f2) * - #g2 #H2 #Hf2 #HU1 #HU2 destruct - [ elim (drops_inv_skip1 … Hf2) -IH -HU1 -Hf2 #Y2 #X2 #HY2 #_ #H destruct - lapply (drops_fwd_isid … HY2 ?) -HY2 /2 width=3 by isuni_inv_push/ -HU2 - #H destruct elim (drops_inv_x_bind_xy … Hf1) - | /4 width=5 by drops_inv_drop1, isuni_inv_next, eq_next/ - ] -| #f1 #I1 #I2 #L #K #Hf1 #_ #IH #f2 elim (pn_split f2) * - #g2 #H2 #Hf2 #HU1 #HU2 destruct - [ elim (drops_inv_skip1 … Hf2) -Hf2 #Y2 #X2 #HY2 #_ #H destruct -Hf1 - /4 width=5 by isuni_fwd_push, eq_push/ - | lapply (drops_inv_drop1 … Hf2) -Hf2 -IH -HU2 #Hg2 - lapply (drops_fwd_isid … Hf1 ?) -Hf1 /2 width=3 by isuni_inv_push/ -HU1 - #H destruct elim (drops_inv_x_bind_xy … Hg2) - ] -] -qed-. - -(* Advanced properties ******************************************************) - -(* Basic_2A1: includes: drop_mono *) -lemma drops_mono: ∀b1,f,L,L1. ⬇*[b1, f] L ≘ L1 → - ∀b2,L2. ⬇*[b2, f] L ≘ L2 → L1 = L2. -#b1 #f #L #L1 lapply (after_isid_dx 𝐈𝐝 … f) -/3 width=8 by drops_conf, drops_fwd_isid/ -qed-. - -(* Basic_2A1: includes: drop_conf_lt *) -lemma drops_conf_skip1: ∀b2,f,L,L2. ⬇*[b2, f] L ≘ L2 → - ∀b1,f1,I1,K1. ⬇*[b1, f1] L ≘ K1.ⓘ{I1} → - ∀f2. f1 ⊚ ⫯f2 ≘ f → - ∃∃I2,K2. L2 = K2.ⓘ{I2} & - ⬇*[b2, f2] K1 ≘ K2 & ⬆*[f2] I2 ≘ I1. -#b2 #f #L #L2 #H2 #b1 #f1 #I1 #K1 #H1 #f2 #Hf lapply (drops_conf … H1 … H2 … Hf) -L -Hf -#H elim (drops_inv_skip1 … H) -H /2 width=5 by ex3_2_intro/ -qed-. - -(* Basic_2A1: includes: drop_trans_lt *) -lemma drops_trans_skip2: ∀b1,f1,L1,L. ⬇*[b1, f1] L1 ≘ L → - ∀b2,f2,I2,K2. ⬇*[b2, f2] L ≘ K2.ⓘ{I2} → - ∀f. f1 ⊚ f2 ≘ ⫯f → - ∃∃I1,K1. L1 = K1.ⓘ{I1} & - ⬇*[b1∧b2, f] K1 ≘ K2 & ⬆*[f] I2 ≘ I1. -#b1 #f1 #L1 #L #H1 #b2 #f2 #I2 #K2 #H2 #f #Hf -lapply (drops_trans … H1 … H2 … Hf) -L -Hf -#H elim (drops_inv_skip2 … H) -H /2 width=5 by ex3_2_intro/ -qed-. - -(* Basic_2A1: includes: drops_conf_div *) -lemma drops_conf_div_bind: ∀f1,f2,I1,I2,L,K. - ⬇*[Ⓣ, f1] L ≘ K.ⓘ{I1} → ⬇*[Ⓣ, f2] L ≘ K.ⓘ{I2} → - 𝐔⦃f1⦄ → 𝐔⦃f2⦄ → f1 ≡ f2 ∧ I1 = I2. -#f1 #f2 #I1 #I2 #L #K #Hf1 #Hf2 #HU1 #HU2 -lapply (drops_isuni_fwd_drop2 … Hf1) // #H1 -lapply (drops_isuni_fwd_drop2 … Hf2) // #H2 -lapply (drops_conf_div … H1 … H2 ??) /2 width=3 by isuni_next/ -H1 -H2 -HU1 -HU2 #H -lapply (eq_inv_nn … H ????) -H [5: |*: // ] #H12 -lapply (drops_eq_repl_back … Hf1 … H12) -Hf1 #H0 -lapply (drops_mono … H0 … Hf2) -L #H -destruct /2 width=1 by conj/ -qed-. - -lemma drops_inv_uni: ∀L,i. ⬇*[Ⓕ, 𝐔❴i❵] L ≘ ⋆ → ∀I,K. ⬇*[i] L ≘ K.ⓘ{I} → ⊥. -#L #i #H1 #I #K #H2 -lapply (drops_F … H2) -H2 #H2 -lapply (drops_mono … H2 … H1) -L -i #H destruct -qed-.