HomeHome Metamath Proof Explorer < Previous   Next >
Related theorems
GIF version

Theorem ecoptocl 3239
Description: Implicit substitution of class for equivalence class of ordered pair.
Hypotheses
Ref Expression
ecoptocl.1 S = ((B × C) / R)
ecoptocl.2 ([⟨x, y⟩]R = A → (φψ))
ecoptocl.3 ((xByC) → φ)
Assertion
Ref Expression
ecoptocl (AS&ps$;)
Distinct variable group(s):   x,y,A   x,B,y   x,C,y   x,R,y   ψ,x,y

Proof of Theorem ecoptocl
StepHypRef Expression
1 ecoptocl.1 . . 3 S = ((B × C) / R)
21eleq2i 1153 . 2 (ASA ∈ ((B × C) / R))
3 elqsi 3228 . . 3 (A ∈ ((B × C) / R) → ∃z(z ∈ (B × C) ∧ A = [z]R))
4 cleqid 1102 . . . . . 6 (B × C) = (B × C)
5 eceq2 3215 . . . . . . . 8 (⟨x, y⟩ = z → [⟨x, y⟩]R = [z]R)
65cleq2d 1112 . . . . . . 7 (⟨x, y⟩ = z → (A = [⟨x, y⟩]RA = [z]R))
76imbi1d 465 . . . . . 6 (⟨x, y⟩ = z → ((A = [⟨x, y⟩]Rψ) ↔ (A = [z]Rψ)))
8 ecoptocl.2 . . . . . . . . 9 ([⟨x, y⟩]R = A → (φψ))
98cleqcoms 1104 . . . . . . . 8 (A = [⟨x, y⟩]R → (φψ))
10 ecoptocl.3 . . . . . . . 8 ((xByC) → φ)
119, 10syl5bi 183 . . . . . . 7 (A = [⟨x, y⟩]R → ((xByC) → ψ))
1211com12 13 . . . . . 6 ((xByC) → (A = [⟨x, y⟩]Rψ))
134, 7, 12optocl 2469 . . . . 5 (z ∈ (B × C) → (A = [z]Rψ))
1413imp 277 . . . 4 ((z ∈ (B × C) ∧ A = [z]R) → ψ)
151419.23aiv 952 . . 3 (∃z(z ∈ (B × C) ∧ A = [z]R) → ψ)
163, 15syl 12 . 2 (A ∈ ((B × C) / R) → ψ)
172, 16sylbi 174 1 (ASψ)
Colors of variables: wff set class
Syntax hints:   → wi 2   ↔ wb 127   ∧ wa 196  ∃wex 678   = wceq 1091   ∈ wcel 1092  ⟨cop 1810   × cxp 2408  [cec 3198   / cqs 3199
This theorem is referenced by:  2ecoptocl 3240  3ecoptocl 3241  mulidpq 3863  recmulpq 3864  halfpq 3876  0idsr 4000  1idsr 4001  00sr 4002  recexsrlem 4006  map2psrpr 4014
This theorem was proved from axioms:  ax-1 3  ax-2 4  ax-3 5  ax-mp 6  ax-4 673  ax-5 674  ax-6 675  ax-7 676  ax-gen 677  ax-8 798  ax-9 799  ax-10 800  ax-11 801  ax-12 802  ax-13 804  ax-14 805  ax-16 922  ax-17 925  ax-ext 1074  ax-rep 1075  ax-pow 1077
This theorem depends on definitions:  df-bi 128  df-or 197  df-an 198  df-ex 679  df-sb 853  df-clab 1093  df-cleq 1097  df-clel 1099  df-rex 1206  df-v 1349  df-dif 1489  df-un 1490  df-in 1491  df-ss 1492  df-nul 1708  df-pw 1799  df-sn 1811  df-pr 1812  df-op 1815  df-br 2063  df-opab 2098  df-xp 2424  df-cnv 2426  df-dm 2428  df-rn 2429  df-res 2430  df-ima 2431  df-ec 3202  df-qs 3205
metamath.org