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Mirrors > Home > NFE Home > Th. List > oprabid2 | GIF version |
Description: Identity law for operator abstractions. (Contributed by Scott Fenton, 19-Apr-2021.) |
Ref | Expression |
---|---|
oprabid2 | ⊢ {〈〈x, y〉, z〉 ∣ 〈〈x, y〉, z〉 ∈ A} = A |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | vex 2862 | . . 3 ⊢ w ∈ V | |
2 | vex 2862 | . . 3 ⊢ t ∈ V | |
3 | vex 2862 | . . 3 ⊢ u ∈ V | |
4 | opeq1 4578 | . . . . . 6 ⊢ (x = w → 〈x, y〉 = 〈w, y〉) | |
5 | 4 | opeq1d 4584 | . . . . 5 ⊢ (x = w → 〈〈x, y〉, z〉 = 〈〈w, y〉, z〉) |
6 | 5 | eleq1d 2419 | . . . 4 ⊢ (x = w → (〈〈x, y〉, z〉 ∈ A ↔ 〈〈w, y〉, z〉 ∈ A)) |
7 | opeq2 4579 | . . . . . 6 ⊢ (y = t → 〈w, y〉 = 〈w, t〉) | |
8 | 7 | opeq1d 4584 | . . . . 5 ⊢ (y = t → 〈〈w, y〉, z〉 = 〈〈w, t〉, z〉) |
9 | 8 | eleq1d 2419 | . . . 4 ⊢ (y = t → (〈〈w, y〉, z〉 ∈ A ↔ 〈〈w, t〉, z〉 ∈ A)) |
10 | opeq2 4579 | . . . . 5 ⊢ (z = u → 〈〈w, t〉, z〉 = 〈〈w, t〉, u〉) | |
11 | 10 | eleq1d 2419 | . . . 4 ⊢ (z = u → (〈〈w, t〉, z〉 ∈ A ↔ 〈〈w, t〉, u〉 ∈ A)) |
12 | 6, 9, 11 | eloprabg 5579 | . . 3 ⊢ ((w ∈ V ∧ t ∈ V ∧ u ∈ V) → (〈〈w, t〉, u〉 ∈ {〈〈x, y〉, z〉 ∣ 〈〈x, y〉, z〉 ∈ A} ↔ 〈〈w, t〉, u〉 ∈ A)) |
13 | 1, 2, 3, 12 | mp3an 1277 | . 2 ⊢ (〈〈w, t〉, u〉 ∈ {〈〈x, y〉, z〉 ∣ 〈〈x, y〉, z〉 ∈ A} ↔ 〈〈w, t〉, u〉 ∈ A) |
14 | 13 | eqoprriv 4853 | 1 ⊢ {〈〈x, y〉, z〉 ∣ 〈〈x, y〉, z〉 ∈ A} = A |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 176 = wceq 1642 ∈ wcel 1710 Vcvv 2859 〈cop 4561 {coprab 5527 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-3 7 ax-mp 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 df-oprab 5528 |
This theorem is referenced by: oprabbi2i 5647 |
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