New Foundations Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > NFE Home > Th. List > 2ecoptocl | GIF version |
Description: Implicit substitution of classes for equivalence classes of ordered pairs. (Contributed by set.mm contributors, 23-Jul-1995.) |
Ref | Expression |
---|---|
2ecoptocl.1 | ⊢ S = ((C × D) / R) |
2ecoptocl.2 | ⊢ ([〈x, y〉]R = A → (φ ↔ ψ)) |
2ecoptocl.3 | ⊢ ([〈z, w〉]R = B → (ψ ↔ χ)) |
2ecoptocl.4 | ⊢ (((x ∈ C ∧ y ∈ D) ∧ (z ∈ C ∧ w ∈ D)) → φ) |
Ref | Expression |
---|---|
2ecoptocl | ⊢ ((A ∈ S ∧ B ∈ S) → χ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2ecoptocl.1 | . . 3 ⊢ S = ((C × D) / R) | |
2 | 2ecoptocl.3 | . . . 4 ⊢ ([〈z, w〉]R = B → (ψ ↔ χ)) | |
3 | 2 | imbi2d 307 | . . 3 ⊢ ([〈z, w〉]R = B → ((A ∈ S → ψ) ↔ (A ∈ S → χ))) |
4 | 2ecoptocl.2 | . . . . . 6 ⊢ ([〈x, y〉]R = A → (φ ↔ ψ)) | |
5 | 4 | imbi2d 307 | . . . . 5 ⊢ ([〈x, y〉]R = A → (((z ∈ C ∧ w ∈ D) → φ) ↔ ((z ∈ C ∧ w ∈ D) → ψ))) |
6 | 2ecoptocl.4 | . . . . . 6 ⊢ (((x ∈ C ∧ y ∈ D) ∧ (z ∈ C ∧ w ∈ D)) → φ) | |
7 | 6 | ex 423 | . . . . 5 ⊢ ((x ∈ C ∧ y ∈ D) → ((z ∈ C ∧ w ∈ D) → φ)) |
8 | 1, 5, 7 | ecoptocl 5997 | . . . 4 ⊢ (A ∈ S → ((z ∈ C ∧ w ∈ D) → ψ)) |
9 | 8 | com12 27 | . . 3 ⊢ ((z ∈ C ∧ w ∈ D) → (A ∈ S → ψ)) |
10 | 1, 3, 9 | ecoptocl 5997 | . 2 ⊢ (B ∈ S → (A ∈ S → χ)) |
11 | 10 | impcom 419 | 1 ⊢ ((A ∈ S ∧ B ∈ S) → χ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 176 ∧ wa 358 = wceq 1642 ∈ wcel 1710 〈cop 4562 × cxp 4771 [cec 5946 / cqs 5947 |
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 4079 ax-xp 4080 ax-cnv 4081 ax-1c 4082 ax-sset 4083 ax-si 4084 ax-ins2 4085 ax-ins3 4086 ax-typlower 4087 ax-sn 4088 |
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 2479 df-ne 2519 df-ral 2620 df-rex 2621 df-reu 2622 df-rmo 2623 df-rab 2624 df-v 2862 df-sbc 3048 df-nin 3212 df-compl 3213 df-in 3214 df-un 3215 df-dif 3216 df-symdif 3217 df-ss 3260 df-pss 3262 df-nul 3552 df-if 3664 df-pw 3725 df-sn 3742 df-pr 3743 df-uni 3893 df-int 3928 df-opk 4059 df-1c 4137 df-pw1 4138 df-uni1 4139 df-xpk 4186 df-cnvk 4187 df-ins2k 4188 df-ins3k 4189 df-imak 4190 df-cok 4191 df-p6 4192 df-sik 4193 df-ssetk 4194 df-imagek 4195 df-idk 4196 df-iota 4340 df-0c 4378 df-addc 4379 df-nnc 4380 df-fin 4381 df-lefin 4441 df-ltfin 4442 df-ncfin 4443 df-tfin 4444 df-evenfin 4445 df-oddfin 4446 df-sfin 4447 df-spfin 4448 df-phi 4566 df-op 4567 df-proj1 4568 df-proj2 4569 df-opab 4624 df-ima 4728 df-xp 4785 df-ec 5948 df-qs 5952 |
This theorem is referenced by: 3ecoptocl 5999 |
Copyright terms: Public domain | W3C validator |