From: Ferruccio Guidi Date: Sat, 4 Oct 2014 21:05:46 +0000 (+0000) Subject: the commit was incomplete (as is often the case :( ) X-Git-Tag: make_still_working~825 X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=499eb9f9a3107c6ee4edd7b6830a1cc1b054bbe2;p=helm.git the commit was incomplete (as is often the case :( ) --- diff --git a/matita/matita/contribs/lambdadelta/basic_2/reduction/fpbq_alt.ma b/matita/matita/contribs/lambdadelta/basic_2/reduction/fpbq_alt.ma new file mode 100644 index 000000000..8bc5c210d --- /dev/null +++ b/matita/matita/contribs/lambdadelta/basic_2/reduction/fpbq_alt.ma @@ -0,0 +1,86 @@ +(**************************************************************************) +(* ___ *) +(* ||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/notation/relations/btpredalt_8.ma". +include "basic_2/reduction/fpb_fleq.ma". +include "basic_2/reduction/fpbq.ma". + +(* "QRST" PARALLEL REDUCTION FOR CLOSURES ***********************************) + +(* alternative definition of fpbq *) +definition fpbqa: ∀h. sd h → tri_relation genv lenv term ≝ + λh,g,G1,L1,T1,G2,L2,T2. + ⦃G1, L1, T1⦄ ≡[0] ⦃G2, L2, T2⦄ ∨ ⦃G1, L1, T1⦄ ≻[h, g] ⦃G2, L2, T2⦄. + +interpretation + "'qrst' parallel reduction (closure) alternative" + 'BTPRedAlt h g G1 L1 T1 G2 L2 T2 = (fpbqa h g G1 L1 T1 G2 L2 T2). + +(* Basic properties *********************************************************) + +lemma fleq_fpbq: ∀h,g,G1,G2,L1,L2,T1,T2. + ⦃G1, L1, T1⦄ ≡[0] ⦃G2, L2, T2⦄ → ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 * /2 width=1 by fpbq_lleq/ +qed. + +lemma fpb_fpbq: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ≻[h, g] ⦃G2, L2, T2⦄ → + ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 * -G2 -L2 -T2 +/3 width=1 by fpbq_fquq, fpbq_cpx, fpbq_lpx, fqu_fquq/ +qed. + +(* Main properties **********************************************************) + +theorem fpbq_fpbqa: ∀h,g,G1,G2,L1,L2,T1,T2. + ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄ → + ⦃G1, L1, T1⦄ ≽≽[h, g] ⦃G2, L2, T2⦄. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 * -G2 -L2 -T2 +[ #G2 #L2 #T2 #H elim (fquq_inv_gen … H) -H + [ /3 width=1 by fpb_fqu, or_intror/ + | * #H1 #H2 #H3 destruct /2 width=1 by or_introl/ + ] +| #T2 #HT12 elim (eq_term_dec T1 T2) + #HnT12 destruct /4 width=1 by fpb_cpx, or_intror, or_introl/ +| #L2 #HL12 elim (lleq_dec … T1 L1 L2 0) + /4 width=1 by fpb_lpx, fleq_intro, or_intror, or_introl/ +| /3 width=1 by fleq_intro, or_introl/ +] +qed. + +theorem fpbqa_inv_fpbq: ∀h,g,G1,G2,L1,L2,T1,T2. + ⦃G1, L1, T1⦄ ≽≽[h, g] ⦃G2, L2, T2⦄ → + ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 * /2 width=1 by fleq_fpbq, fpb_fpbq/ +qed-. + +(* Advanced eliminators *****************************************************) + +lemma fpbq_ind_alt: ∀h,g,G1,G2,L1,L2,T1,T2. ∀R:Prop. + (⦃G1, L1, T1⦄ ≡[0] ⦃G2, L2, T2⦄ → R) → + (⦃G1, L1, T1⦄ ≻[h, g] ⦃G2, L2, T2⦄ → R) → + ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄ → R. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 #R #HI1 #HI2 #H elim (fpbq_fpbqa … H) /2 width=1 by/ +qed-. + +(* aternative definition of fpb *********************************************) + +lemma fpb_fpbq_alt: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ≻[h, g] ⦃G2, L2, T2⦄ → + ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄ ∧ (⦃G1, L1, T1⦄ ≡[0] ⦃G2, L2, T2⦄ → ⊥). +/3 width=10 by fpb_fpbq, fpb_inv_fleq, conj/ qed. + +lemma fpbq_inv_fpb_alt: ∀h,g,G1,G2,L1,L2,T1,T2. ⦃G1, L1, T1⦄ ≽[h, g] ⦃G2, L2, T2⦄ → + (⦃G1, L1, T1⦄ ≡[0] ⦃G2, L2, T2⦄ → ⊥) → ⦃G1, L1, T1⦄ ≻[h, g] ⦃G2, L2, T2⦄. +#h #g #G1 #G2 #L1 #L2 #T1 #T2 #H #H0 @(fpbq_ind_alt … H) -H // +#H elim H0 -H0 // +qed-. diff --git a/matita/matita/contribs/lambdadelta/basic_2/web/basic_2_src.tbl b/matita/matita/contribs/lambdadelta/basic_2/web/basic_2_src.tbl index 0a955cb64..1aeb5138b 100644 --- a/matita/matita/contribs/lambdadelta/basic_2/web/basic_2_src.tbl +++ b/matita/matita/contribs/lambdadelta/basic_2/web/basic_2_src.tbl @@ -100,7 +100,7 @@ table { ] [ { "parallel qrst-computation" * } { [ "fpbg ( ⦃?,?,?⦄ >≡[?,?] ⦃?,?,?⦄ )" "fpbg_lift" + "fpbg_fleq" + "fpbg_fpbs" + "fpbg_fpbg" * ] - [ "fpbs ( ⦃?,?,?⦄ ≥[?,?] ⦃?,?,?⦄ )" "fpbs_alt ( ⦃?,?,?⦄ ≥≥[?,?] ⦃?,?,?⦄ )" "fpbs_lift" + "fpbs_fleq" + "fpbs_aaa" + "fpbs_fpbu" + "fpbs_fpbc" + "fpbs_fpbs" * ] + [ "fpbs ( ⦃?,?,?⦄ ≥[?,?] ⦃?,?,?⦄ )" "fpbs_alt ( ⦃?,?,?⦄ ≥≥[?,?] ⦃?,?,?⦄ )" "fpbs_lift" + "fpbs_aaa" + "fpbs_fpb" + "fpbs_fpbs" * ] } ] [ { "decomposed extended computation" * } { @@ -130,9 +130,8 @@ table { class "water" [ { "reduction" * } { [ { "parallel qrst-reduction" * } { - [ "fpbc ( ⦃?,?,?⦄ ≻≡[?,?] ⦃?,?,?⦄ )" "fpbc_fleq" * ] - [ "fpbu ( ⦃?,?,?⦄ ≻[?,?] ⦃?,?,?⦄ )" "fpbu_lift" + "fpbu_lleq" + "fpbu_fleq" * ] - [ "fpb ( ⦃?,?,?⦄ ≽[?,?] ⦃?,?,?⦄ )" "fpb_lift" + "fpb_aaa" * ] + [ "fpbq ( ⦃?,?,?⦄ ≽[?,?] ⦃?,?,?⦄ )" "fpbq_alt ( ⦃?,?,?⦄ ≽≽[?,?] ⦃?,?,?⦄ )" "fpbq_lift" + "fpbq_aaa" * ] + [ "fpb ( ⦃?,?,?⦄ ≻[?,?] ⦃?,?,?⦄ )" "fpb_lift" + "fpb_lleq" + "fpb_fleq" * ] } ] [ { "normal forms for context-sensitive extended reduction" * } {