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| Mirrors > Home > ILE Home > Th. List > setsvalg | GIF version | ||
| Description: Value of the structure replacement function. (Contributed by Mario Carneiro, 30-Apr-2015.) |
| Ref | Expression |
|---|---|
| setsvalg | ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elex 2774 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝑆 ∈ V) | |
| 2 | elex 2774 | . 2 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ V) | |
| 3 | resexg 4986 | . . . 4 ⊢ (𝑆 ∈ V → (𝑆 ↾ (V ∖ dom {𝐴})) ∈ V) | |
| 4 | snexg 4217 | . . . 4 ⊢ (𝐴 ∈ V → {𝐴} ∈ V) | |
| 5 | unexg 4478 | . . . 4 ⊢ (((𝑆 ↾ (V ∖ dom {𝐴})) ∈ V ∧ {𝐴} ∈ V) → ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) | |
| 6 | 3, 4, 5 | syl2an 289 | . . 3 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V) → ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) |
| 7 | simpl 109 | . . . . . 6 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → 𝑠 = 𝑆) | |
| 8 | simpr 110 | . . . . . . . . 9 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → 𝑒 = 𝐴) | |
| 9 | 8 | sneqd 3635 | . . . . . . . 8 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → {𝑒} = {𝐴}) |
| 10 | 9 | dmeqd 4868 | . . . . . . 7 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → dom {𝑒} = dom {𝐴}) |
| 11 | 10 | difeq2d 3281 | . . . . . 6 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → (V ∖ dom {𝑒}) = (V ∖ dom {𝐴})) |
| 12 | 7, 11 | reseq12d 4947 | . . . . 5 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → (𝑠 ↾ (V ∖ dom {𝑒})) = (𝑆 ↾ (V ∖ dom {𝐴}))) |
| 13 | 12, 9 | uneq12d 3318 | . . . 4 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → ((𝑠 ↾ (V ∖ dom {𝑒})) ∪ {𝑒}) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
| 14 | df-sets 12685 | . . . 4 ⊢ sSet = (𝑠 ∈ V, 𝑒 ∈ V ↦ ((𝑠 ↾ (V ∖ dom {𝑒})) ∪ {𝑒})) | |
| 15 | 13, 14 | ovmpoga 6052 | . . 3 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V ∧ ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
| 16 | 6, 15 | mpd3an3 1349 | . 2 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
| 17 | 1, 2, 16 | syl2an 289 | 1 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 = wceq 1364 ∈ wcel 2167 Vcvv 2763 ∖ cdif 3154 ∪ cun 3155 {csn 3622 dom cdm 4663 ↾ cres 4665 (class class class)co 5922 sSet csts 12676 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-setind 4573 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-sbc 2990 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-br 4034 df-opab 4095 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-res 4675 df-iota 5219 df-fun 5260 df-fv 5266 df-ov 5925 df-oprab 5926 df-mpo 5927 df-sets 12685 |
| This theorem is referenced by: setsvala 12709 setsfun 12713 setsfun0 12714 setsresg 12716 |
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