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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 "basic_2/relocation/fsup.ma".
16 include "basic_2/reduction/lpr_ldrop.ma".
18 (* SN PARALLEL REDUCTION FOR LOCAL ENVIRONMENTS *****************************)
20 (* Main properties on context-sensitive parallel reduction for terms ********)
22 fact cpr_conf_lpr_atom_atom:
23 ∀I,L1,L2. ∃∃T. L1 ⊢ ⓪{I} ➡ T & L2 ⊢ ⓪{I} ➡ T.
26 fact cpr_conf_lpr_atom_delta:
28 ∀L,T.♯{L, T} < ♯{L0, #i} →
29 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
30 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
31 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
33 ∀K0,V0. ⇩[O, i] L0 ≡ K0.ⓓV0 →
34 ∀V2. K0 ⊢ V0 ➡ V2 → ∀T2. ⇧[O, i + 1] V2 ≡ T2 →
35 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
36 ∃∃T. L1 ⊢ #i ➡ T & L2 ⊢ T2 ➡ T.
37 #L0 #i #IH #K0 #V0 #HLK0 #V2 #HV02 #T2 #HVT2 #L1 #HL01 #L2 #HL02
38 elim (lpr_ldrop_conf … HLK0 … HL01) -HL01 #X1 #H1 #HLK1
39 elim (lpr_inv_pair1 … H1) -H1 #K1 #V1 #HK01 #HV01 #H destruct
40 elim (lpr_ldrop_conf … HLK0 … HL02) -HL02 #X2 #H2 #HLK2
41 elim (lpr_inv_pair1 … H2) -H2 #K2 #W2 #HK02 #_ #H destruct
42 lapply (ldrop_fwd_ldrop2 … HLK2) -W2 #HLK2
43 lapply (ldrop_pair2_fwd_fw … HLK0 (#i)) -HLK0 #HLK0
44 elim (IH … HLK0 … HV01 … HV02 … HK01 … HK02) -L0 -K0 -V0 #V #HV1 #HV2
45 elim (lift_total V 0 (i+1)) #T #HVT
46 lapply (cpr_lift … HV2 … HLK2 … HVT2 … HVT) -K2 -V2 /3 width=6/
49 (* Basic_1: includes: pr0_delta_delta pr2_delta_delta *)
50 fact cpr_conf_lpr_delta_delta:
52 ∀L,T.♯{L, T} < ♯{L0, #i} →
53 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
54 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
55 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
57 ∀K0,V0. ⇩[O, i] L0 ≡ K0.ⓓV0 →
58 ∀V1. K0 ⊢ V0 ➡ V1 → ∀T1. ⇧[O, i + 1] V1 ≡ T1 →
59 ∀KX,VX. ⇩[O, i] L0 ≡ KX.ⓓVX →
60 ∀V2. KX ⊢ VX ➡ V2 → ∀T2. ⇧[O, i + 1] V2 ≡ T2 →
61 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
62 ∃∃T. L1 ⊢ T1 ➡ T & L2 ⊢ T2 ➡ T.
63 #L0 #i #IH #K0 #V0 #HLK0 #V1 #HV01 #T1 #HVT1
64 #KX #VX #H #V2 #HV02 #T2 #HVT2 #L1 #HL01 #L2 #HL02
65 lapply (ldrop_mono … H … HLK0) -H #H destruct
66 elim (lpr_ldrop_conf … HLK0 … HL01) -HL01 #X1 #H1 #HLK1
67 elim (lpr_inv_pair1 … H1) -H1 #K1 #W1 #HK01 #_ #H destruct
68 lapply (ldrop_fwd_ldrop2 … HLK1) -W1 #HLK1
69 elim (lpr_ldrop_conf … HLK0 … HL02) -HL02 #X2 #H2 #HLK2
70 elim (lpr_inv_pair1 … H2) -H2 #K2 #W2 #HK02 #_ #H destruct
71 lapply (ldrop_fwd_ldrop2 … HLK2) -W2 #HLK2
72 lapply (ldrop_pair2_fwd_fw … HLK0 (#i)) -HLK0 #HLK0
73 elim (IH … HLK0 … HV01 … HV02 … HK01 … HK02) -L0 -K0 -V0 #V #HV1 #HV2
74 elim (lift_total V 0 (i+1)) #T #HVT
75 lapply (cpr_lift … HV1 … HLK1 … HVT1 … HVT) -K1 -V1
76 lapply (cpr_lift … HV2 … HLK2 … HVT2 … HVT) -K2 -V2 -V /2 width=3/
79 fact cpr_conf_lpr_bind_bind:
81 ∀L,T.♯{L,T} < ♯{L0,ⓑ{a,I}V0.T0} →
82 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
83 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
84 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
86 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0.ⓑ{I}V0 ⊢ T0 ➡ T1 →
87 ∀V2. L0 ⊢ V0 ➡ V2 → ∀T2. L0.ⓑ{I}V0 ⊢ T0 ➡ T2 →
88 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
89 ∃∃T. L1 ⊢ ⓑ{a,I}V1.T1 ➡ T & L2 ⊢ ⓑ{a,I}V2.T2 ➡ T.
90 #a #I #L0 #V0 #T0 #IH #V1 #HV01 #T1 #HT01
91 #V2 #HV02 #T2 #HT02 #L1 #HL01 #L2 #HL02
92 elim (IH … HV01 … HV02 … HL01 … HL02) //
93 elim (IH … HT01 … HT02 (L1.ⓑ{I}V1) … (L2.ⓑ{I}V2)) -IH // /2 width=1/ /3 width=5/
96 fact cpr_conf_lpr_bind_zeta:
98 ∀L,T.♯{L,T} < ♯{L0,+ⓓV0.T0} →
99 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
100 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
101 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
103 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0.ⓓV0 ⊢ T0 ➡ T1 →
104 ∀T2. L0.ⓓV0 ⊢ T0 ➡ T2 → ∀X2. ⇧[O, 1] X2 ≡ T2 →
105 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
106 ∃∃T. L1 ⊢ +ⓓV1.T1 ➡ T & L2 ⊢ X2 ➡ T.
107 #L0 #V0 #T0 #IH #V1 #HV01 #T1 #HT01
108 #T2 #HT02 #X2 #HXT2 #L1 #HL01 #L2 #HL02
109 elim (IH … HT01 … HT02 (L1.ⓓV1) … (L2.ⓓV1)) -IH -HT01 -HT02 // /2 width=1/ -L0 -V0 -T0 #T #HT1 #HT2
110 elim (cpr_inv_lift1 … HT2 L2 … HXT2) -T2 /2 width=1/ /3 width=3/
113 fact cpr_conf_lpr_zeta_zeta:
115 ∀L,T.♯{L,T} < ♯{L0,+ⓓV0.T0} →
116 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
117 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
118 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
120 ∀T1. L0.ⓓV0 ⊢ T0 ➡ T1 → ∀X1. ⇧[O, 1] X1 ≡ T1 →
121 ∀T2. L0.ⓓV0 ⊢ T0 ➡ T2 → ∀X2. ⇧[O, 1] X2 ≡ T2 →
122 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
123 ∃∃T. L1 ⊢ X1 ➡ T & L2 ⊢ X2 ➡ T.
124 #L0 #V0 #T0 #IH #T1 #HT01 #X1 #HXT1
125 #T2 #HT02 #X2 #HXT2 #L1 #HL01 #L2 #HL02
126 elim (IH … HT01 … HT02 (L1.ⓓV0) … (L2.ⓓV0)) -IH -HT01 -HT02 // /2 width=1/ -L0 -T0 #T #HT1 #HT2
127 elim (cpr_inv_lift1 … HT1 L1 … HXT1) -T1 /2 width=1/ #T1 #HT1 #HXT1
128 elim (cpr_inv_lift1 … HT2 L2 … HXT2) -T2 /2 width=1/ #T2 #HT2 #HXT2
129 lapply (lift_inj … HT2 … HT1) -T #H destruct /2 width=3/
132 fact cpr_conf_lpr_flat_flat:
134 ∀L,T.♯{L,T} < ♯{L0,ⓕ{I}V0.T0} →
135 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
136 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
137 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
139 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0 ⊢ T0 ➡ T1 →
140 ∀V2. L0 ⊢ V0 ➡ V2 → ∀T2. L0 ⊢ T0 ➡ T2 →
141 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
142 ∃∃T. L1 ⊢ ⓕ{I}V1.T1 ➡ T & L2 ⊢ ⓕ{I}V2.T2 ➡ T.
143 #I #L0 #V0 #T0 #IH #V1 #HV01 #T1 #HT01
144 #V2 #HV02 #T2 #HT02 #L1 #HL01 #L2 #HL02
145 elim (IH … HV01 … HV02 … HL01 … HL02) //
146 elim (IH … HT01 … HT02 … HL01 … HL02) // /3 width=5/
149 fact cpr_conf_lpr_flat_tau:
151 ∀L,T.♯{L,T} < ♯{L0,ⓝV0.T0} →
152 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
153 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
154 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
156 ∀V1,T1. L0 ⊢ T0 ➡ T1 → ∀T2. L0 ⊢ T0 ➡ T2 →
157 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
158 ∃∃T. L1 ⊢ ⓝV1.T1 ➡ T & L2 ⊢ T2 ➡ T.
159 #L0 #V0 #T0 #IH #V1 #T1 #HT01
160 #T2 #HT02 #L1 #HL01 #L2 #HL02
161 elim (IH … HT01 … HT02 … HL01 … HL02) // -L0 -V0 -T0 /3 width=3/
164 fact cpr_conf_lpr_tau_tau:
166 ∀L,T.♯{L,T} < ♯{L0,ⓝV0.T0} →
167 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
168 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
169 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
171 ∀T1. L0 ⊢ T0 ➡ T1 → ∀T2. L0 ⊢ T0 ➡ T2 →
172 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
173 ∃∃T. L1 ⊢ T1 ➡ T & L2 ⊢ T2 ➡ T.
174 #L0 #V0 #T0 #IH #T1 #HT01
175 #T2 #HT02 #L1 #HL01 #L2 #HL02
176 elim (IH … HT01 … HT02 … HL01 … HL02) // -L0 -V0 -T0 /2 width=3/
179 fact cpr_conf_lpr_flat_beta:
181 ∀L,T.♯{L,T} < ♯{L0,ⓐV0.ⓛ{a}W0.T0} →
182 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
183 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
184 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
186 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0 ⊢ ⓛ{a}W0.T0 ➡ T1 →
187 ∀V2. L0 ⊢ V0 ➡ V2 → ∀T2. L0.ⓛW0 ⊢ T0 ➡ T2 →
188 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
189 ∃∃T. L1 ⊢ ⓐV1.T1 ➡ T & L2 ⊢ ⓓ{a}V2.T2 ➡ T.
190 #a #L0 #V0 #W0 #T0 #IH #V1 #HV01 #X #H
191 #V2 #HV02 #T2 #HT02 #L1 #HL01 #L2 #HL02
192 elim (cpr_inv_abst1 … H) -H #W1 #T1 #HW01 #HT01 #H destruct
193 elim (IH … HV01 … HV02 … HL01 … HL02) -HV01 -HV02 /2 width=1/ #V #HV1 #HV2
194 elim (IH … HT01 … HT02 (L1.ⓛW1) … (L2.ⓛW1)) /2 width=1/ -L0 -V0 -W0 -T0 #T #HT1 #HT2
195 lapply (cpr_lsubr_trans … HT2 (L2.ⓓV2) ?) -HT2 /2 width=1/ /3 width=5/
198 (* Basic-1: includes:
199 pr0_cong_upsilon_refl pr0_cong_upsilon_zeta
200 pr0_cong_upsilon_cong pr0_cong_upsilon_delta
202 fact cpr_conf_lpr_flat_theta:
204 ∀L,T.♯{L,T} < ♯{L0,ⓐV0.ⓓ{a}W0.T0} →
205 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
206 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
207 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
209 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0 ⊢ ⓓ{a}W0.T0 ➡ T1 →
210 ∀V2. L0 ⊢ V0 ➡ V2 → ∀U2. ⇧[O, 1] V2 ≡ U2 →
211 ∀W2. L0 ⊢ W0 ➡ W2 → ∀T2. L0.ⓓW0 ⊢ T0 ➡ T2 →
212 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
213 ∃∃T. L1 ⊢ ⓐV1.T1 ➡ T & L2 ⊢ ⓓ{a}W2.ⓐU2.T2 ➡ T.
214 #a #L0 #V0 #W0 #T0 #IH #V1 #HV01 #X #H
215 #V2 #HV02 #U2 #HVU2 #W2 #HW02 #T2 #HT02 #L1 #HL01 #L2 #HL02
216 elim (IH … HV01 … HV02 … HL01 … HL02) -HV01 -HV02 /2 width=1/ #V #HV1 #HV2
217 elim (lift_total V 0 1) #U #HVU
218 lapply (cpr_lift … HV2 (L2.ⓓW2) … HVU2 … HVU) -HVU2 /2 width=1/ #HU2
219 elim (cpr_inv_abbr1 … H) -H *
220 [ #W1 #T1 #HW01 #HT01 #H destruct
221 elim (IH … HW01 … HW02 … HL01 … HL02) /2 width=1/
222 elim (IH … HT01 … HT02 (L1.ⓓW1) … (L2.ⓓW2)) /2 width=1/ -L0 -V0 -W0 -T0 /4 width=7/
223 | #T1 #HT01 #HXT1 #H destruct
224 elim (IH … HT01 … HT02 (L1.ⓓW2) … (L2.ⓓW2)) /2 width=1/ -L0 -V0 -W0 -T0 #T #HT1 #HT2
225 elim (cpr_inv_lift1 … HT1 L1 … HXT1) -HXT1 /2 width=1/ #Y #HYT #HXY
226 @(ex2_intro … (ⓐV.Y)) /2 width=1/ /3 width=5/ (**) (* auto /4 width=9/ is too slow *)
230 fact cpr_conf_lpr_beta_beta:
232 ∀L,T.♯{L,T} < ♯{L0,ⓐV0.ⓛ{a}W0.T0} →
233 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
234 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
235 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
237 ∀V1. L0 ⊢ V0 ➡ V1 → ∀T1. L0.ⓛW0 ⊢ T0 ➡ T1 →
238 ∀V2. L0 ⊢ V0 ➡ V2 → ∀T2. L0.ⓛW0 ⊢ T0 ➡ T2 →
239 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
240 ∃∃T. L1 ⊢ ⓓ{a}V1.T1 ➡ T & L2 ⊢ ⓓ{a}V2.T2 ➡ T.
241 #a #L0 #V0 #W0 #T0 #IH #V1 #HV01 #T1 #HT01
242 #V2 #HV02 #T2 #HT02 #L1 #HL01 #L2 #HL02
243 elim (IH … HV01 … HV02 … HL01 … HL02) -HV01 -HV02 /2 width=1/ #V #HV1 #HV2
244 elim (IH … HT01 … HT02 (L1.ⓛW0) … (L2.ⓛW0)) /2 width=1/ -L0 -V0 -T0 #T #HT1 #HT2
245 lapply (cpr_lsubr_trans … HT1 (L1.ⓓV1) ?) -HT1 /2 width=1/
246 lapply (cpr_lsubr_trans … HT2 (L2.ⓓV2) ?) -HT2 /2 width=1/ /3 width=5/
249 (* Basic_1: was: pr0_upsilon_upsilon *)
250 fact cpr_conf_lpr_theta_theta:
252 ∀L,T.♯{L,T} < ♯{L0,ⓐV0.ⓓ{a}W0.T0} →
253 ∀T1. L ⊢ T ➡ T1 → ∀T2. L ⊢ T ➡ T2 →
254 ∀L1. L ⊢ ➡ L1 → ∀L2. L ⊢ ➡ L2 →
255 ∃∃T0. L1 ⊢ T1 ➡ T0 & L2 ⊢ T2 ➡ T0
257 ∀V1. L0 ⊢ V0 ➡ V1 → ∀U1. ⇧[O, 1] V1 ≡ U1 →
258 ∀W1. L0 ⊢ W0 ➡ W1 → ∀T1. L0.ⓓW0 ⊢ T0 ➡ T1 →
259 ∀V2. L0 ⊢ V0 ➡ V2 → ∀U2. ⇧[O, 1] V2 ≡ U2 →
260 ∀W2. L0 ⊢ W0 ➡ W2 → ∀T2. L0.ⓓW0 ⊢ T0 ➡ T2 →
261 ∀L1. L0 ⊢ ➡ L1 → ∀L2. L0 ⊢ ➡ L2 →
262 ∃∃T. L1 ⊢ ⓓ{a}W1.ⓐU1.T1 ➡ T & L2 ⊢ ⓓ{a}W2.ⓐU2.T2 ➡ T.
263 #a #L0 #V0 #W0 #T0 #IH #V1 #HV01 #U1 #HVU1 #W1 #HW01 #T1 #HT01
264 #V2 #HV02 #U2 #HVU2 #W2 #HW02 #T2 #HT02 #L1 #HL01 #L2 #HL02
265 elim (IH … HV01 … HV02 … HL01 … HL02) -HV01 -HV02 /2 width=1/ #V #HV1 #HV2
266 elim (IH … HW01 … HW02 … HL01 … HL02) /2 width=1/
267 elim (IH … HT01 … HT02 (L1.ⓓW1) … (L2.ⓓW2)) /2 width=1/ -L0 -V0 -W0 -T0
268 elim (lift_total V 0 1) #U #HVU
269 lapply (cpr_lift … HV1 (L1.ⓓW1) … HVU1 … HVU) -HVU1 /2 width=1/
270 lapply (cpr_lift … HV2 (L2.ⓓW2) … HVU2 … HVU) -HVU2 /2 width=1/ /4 width=7/
273 theorem cpr_conf_lpr: lpx_sn_confluent cpr cpr.
274 #L0 #T0 @(f2_ind … fw … L0 T0) -L0 -T0 #n #IH #L0 * [|*]
275 [ #I0 #Hn #T1 #H1 #T2 #H2 #L1 #HL01 #L2 #HL02 destruct
276 elim (cpr_inv_atom1 … H1) -H1
277 elim (cpr_inv_atom1 … H2) -H2
279 /2 width=1 by cpr_conf_lpr_atom_atom/
280 | * #K0 #V0 #V2 #i2 #HLK0 #HV02 #HVT2 #H2 #H1 destruct
281 /3 width=10 by cpr_conf_lpr_atom_delta/
282 | #H2 * #K0 #V0 #V1 #i1 #HLK0 #HV01 #HVT1 #H1 destruct
283 /4 width=10 by ex2_commute, cpr_conf_lpr_atom_delta/
284 | * #X #Y #V2 #z #H #HV02 #HVT2 #H2
285 * #K0 #V0 #V1 #i #HLK0 #HV01 #HVT1 #H1 destruct
286 /3 width=17 by cpr_conf_lpr_delta_delta/
288 | #a #I #V0 #T0 #Hn #X1 #H1 #X2 #H2 #L1 #HL01 #L2 #HL02 destruct
289 elim (cpr_inv_bind1 … H1) -H1 *
290 [ #V1 #T1 #HV01 #HT01 #H1
291 | #T1 #HT01 #HXT1 #H11 #H12
293 elim (cpr_inv_bind1 … H2) -H2 *
294 [1,3: #V2 #T2 #HV02 #HT02 #H2
295 |2,4: #T2 #HT02 #HXT2 #H21 #H22
297 [ /3 width=10 by cpr_conf_lpr_bind_bind/
298 | /4 width=11 by ex2_commute, cpr_conf_lpr_bind_zeta/
299 | /3 width=11 by cpr_conf_lpr_bind_zeta/
300 | /3 width=12 by cpr_conf_lpr_zeta_zeta/
302 | #I #V0 #T0 #Hn #X1 #H1 #X2 #H2 #L1 #HL01 #L2 #HL02 destruct
303 elim (cpr_inv_flat1 … H1) -H1 *
304 [ #V1 #T1 #HV01 #HT01 #H1
306 | #a1 #V1 #Y1 #Z1 #T1 #HV01 #HZT1 #H11 #H12 #H13
307 | #a1 #V1 #U1 #Y1 #W1 #Z1 #T1 #HV01 #HVU1 #HYW1 #HZT1 #H11 #H12 #H13
309 elim (cpr_inv_flat1 … H2) -H2 *
310 [1,5,9,13: #V2 #T2 #HV02 #HT02 #H2
312 |3,7,11,15: #a2 #V2 #Y2 #Z2 #T2 #HV02 #HZT2 #H21 #H22 #H23
313 |4,8,12,16: #a2 #V2 #U2 #Y2 #W2 #Z2 #T2 #HV02 #HVU2 #HYW2 #HZT2 #H21 #H22 #H23
315 [ /3 width=10 by cpr_conf_lpr_flat_flat/
316 | /4 width=8 by ex2_commute, cpr_conf_lpr_flat_tau/
317 | /4 width=11 by ex2_commute, cpr_conf_lpr_flat_beta/
318 | /4 width=14 by ex2_commute, cpr_conf_lpr_flat_theta/
319 | /3 width=8 by cpr_conf_lpr_flat_tau/
320 | /3 width=7 by cpr_conf_lpr_tau_tau/
321 | /3 width=11 by cpr_conf_lpr_flat_beta/
322 | /3 width=11 by cpr_conf_lpr_beta_beta/
323 | /3 width=14 by cpr_conf_lpr_flat_theta/
324 | /3 width=17 by cpr_conf_lpr_theta_theta/
329 (* Basic_1: includes: pr0_confluence pr2_confluence *)
330 theorem cpr_conf: ∀L. confluent … (cpr L).
331 /2 width=6 by cpr_conf_lpr/ qed-.
333 (* Properties on context-sensitive parallel reduction for terms *************)
335 lemma lpr_cpr_conf_dx: ∀L0,T0,T1. L0 ⊢ T0 ➡ T1 → ∀L1. L0 ⊢ ➡ L1 →
336 ∃∃T. L1 ⊢ T0 ➡ T & L1 ⊢ T1 ➡ T.
337 #L0 #T0 #T1 #HT01 #L1 #HL01
338 elim (cpr_conf_lpr … HT01 T0 … HL01 … HL01) // -L0 /2 width=3/
341 lemma lpr_cpr_conf_sn: ∀L0,T0,T1. L0 ⊢ T0 ➡ T1 → ∀L1. L0 ⊢ ➡ L1 →
342 ∃∃T. L1 ⊢ T0 ➡ T & L0 ⊢ T1 ➡ T.
343 #L0 #T0 #T1 #HT01 #L1 #HL01
344 elim (cpr_conf_lpr … HT01 T0 … L0 … HL01) // -HT01 -HL01 /2 width=3/
347 lemma fsup_cpr_trans: ∀L1,L2,T1,T2. ⦃L1, T1⦄ ⊃ ⦃L2, T2⦄ → ∀U2. L2 ⊢ T2 ➡ U2 →
348 ∃∃L,U1. L1 ⊢ ➡ L & L ⊢ T1 ➡ U1 & ⦃L, U1⦄ ⊃ ⦃L2, U2⦄.
349 #L1 #L2 #T1 #T2 #H elim H -L1 -L2 -T1 -T2 [1,2,3,4,5: /3 width=5/ ]
350 #L1 #K1 #K2 #T1 #T2 #U1 #d #e #HLK1 #HTU1 #_ #IHT12 #U2 #HTU2
351 elim (IHT12 … HTU2) -IHT12 -HTU2 #K #T #HK1 #HT1 #HT2
352 elim (lift_total T d e) #U #HTU
353 elim (ldrop_lpr_trans … HLK1 … HK1) -HLK1 -HK1 #L2 #HL12 #HL2K
354 lapply (cpr_lift … HT1 … HL2K … HTU1 … HTU) -HT1 -HTU1 /3 width=11/