New Foundations Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > NFE Home > Th. List > copsex4g | GIF version |
Description: An implicit substitution inference for 2 ordered pairs. (Contributed by NM, 5-Aug-1995.) |
Ref | Expression |
---|---|
copsex4g.1 | ⊢ (((x = A ∧ y = B) ∧ (z = C ∧ w = D)) → (φ ↔ ψ)) |
Ref | Expression |
---|---|
copsex4g | ⊢ (((A ∈ R ∧ B ∈ S) ∧ (C ∈ R ∧ D ∈ S)) → (∃x∃y∃z∃w((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ∧ φ) ↔ ψ)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqcom 2355 | . . . . . . 7 ⊢ (〈A, B〉 = 〈x, y〉 ↔ 〈x, y〉 = 〈A, B〉) | |
2 | opth 4602 | . . . . . . 7 ⊢ (〈x, y〉 = 〈A, B〉 ↔ (x = A ∧ y = B)) | |
3 | 1, 2 | bitri 240 | . . . . . 6 ⊢ (〈A, B〉 = 〈x, y〉 ↔ (x = A ∧ y = B)) |
4 | eqcom 2355 | . . . . . . 7 ⊢ (〈C, D〉 = 〈z, w〉 ↔ 〈z, w〉 = 〈C, D〉) | |
5 | opth 4602 | . . . . . . 7 ⊢ (〈z, w〉 = 〈C, D〉 ↔ (z = C ∧ w = D)) | |
6 | 4, 5 | bitri 240 | . . . . . 6 ⊢ (〈C, D〉 = 〈z, w〉 ↔ (z = C ∧ w = D)) |
7 | 3, 6 | anbi12i 678 | . . . . 5 ⊢ ((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ↔ ((x = A ∧ y = B) ∧ (z = C ∧ w = D))) |
8 | 7 | anbi1i 676 | . . . 4 ⊢ (((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ∧ φ) ↔ (((x = A ∧ y = B) ∧ (z = C ∧ w = D)) ∧ φ)) |
9 | 8 | 2exbii 1583 | . . 3 ⊢ (∃z∃w((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ∧ φ) ↔ ∃z∃w(((x = A ∧ y = B) ∧ (z = C ∧ w = D)) ∧ φ)) |
10 | 9 | 2exbii 1583 | . 2 ⊢ (∃x∃y∃z∃w((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ∧ φ) ↔ ∃x∃y∃z∃w(((x = A ∧ y = B) ∧ (z = C ∧ w = D)) ∧ φ)) |
11 | id 19 | . . 3 ⊢ (((x = A ∧ y = B) ∧ (z = C ∧ w = D)) → ((x = A ∧ y = B) ∧ (z = C ∧ w = D))) | |
12 | copsex4g.1 | . . 3 ⊢ (((x = A ∧ y = B) ∧ (z = C ∧ w = D)) → (φ ↔ ψ)) | |
13 | 11, 12 | cgsex4g 2892 | . 2 ⊢ (((A ∈ R ∧ B ∈ S) ∧ (C ∈ R ∧ D ∈ S)) → (∃x∃y∃z∃w(((x = A ∧ y = B) ∧ (z = C ∧ w = D)) ∧ φ) ↔ ψ)) |
14 | 10, 13 | syl5bb 248 | 1 ⊢ (((A ∈ R ∧ B ∈ S) ∧ (C ∈ R ∧ D ∈ S)) → (∃x∃y∃z∃w((〈A, B〉 = 〈x, y〉 ∧ 〈C, D〉 = 〈z, w〉) ∧ φ) ↔ ψ)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 176 ∧ wa 358 ∃wex 1541 = wceq 1642 ∈ wcel 1710 〈cop 4561 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1546 ax-5 1557 ax-17 1616 ax-9 1654 ax-8 1675 ax-13 1712 ax-14 1714 ax-6 1729 ax-7 1734 ax-11 1746 ax-12 1925 ax-ext 2334 ax-nin 4078 ax-xp 4079 ax-cnv 4080 ax-1c 4081 ax-sset 4082 ax-si 4083 ax-ins2 4084 ax-ins3 4085 ax-typlower 4086 ax-sn 4087 |
This theorem depends on definitions: df-bi 177 df-or 359 df-an 360 df-3or 935 df-3an 936 df-nan 1288 df-tru 1319 df-ex 1542 df-nf 1545 df-sb 1649 df-eu 2208 df-mo 2209 df-clab 2340 df-cleq 2346 df-clel 2349 df-nfc 2478 df-ne 2518 df-ral 2619 df-rex 2620 df-reu 2621 df-rmo 2622 df-rab 2623 df-v 2861 df-sbc 3047 df-nin 3211 df-compl 3212 df-in 3213 df-un 3214 df-dif 3215 df-symdif 3216 df-ss 3259 df-pss 3261 df-nul 3551 df-if 3663 df-pw 3724 df-sn 3741 df-pr 3742 df-uni 3892 df-int 3927 df-opk 4058 df-1c 4136 df-pw1 4137 df-uni1 4138 df-xpk 4185 df-cnvk 4186 df-ins2k 4187 df-ins3k 4188 df-imak 4189 df-cok 4190 df-p6 4191 df-sik 4192 df-ssetk 4193 df-imagek 4194 df-idk 4195 df-iota 4339 df-0c 4377 df-addc 4378 df-nnc 4379 df-fin 4380 df-lefin 4440 df-ltfin 4441 df-ncfin 4442 df-tfin 4443 df-evenfin 4444 df-oddfin 4445 df-sfin 4446 df-spfin 4447 df-phi 4565 df-op 4566 df-proj1 4567 df-proj2 4568 |
This theorem is referenced by: opbrop 4841 ov3 5599 |
Copyright terms: Public domain | W3C validator |