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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 2737 | . 2 ⊢ (𝑆 ∈ 𝑉 → 𝑆 ∈ V) | |
2 | elex 2737 | . 2 ⊢ (𝐴 ∈ 𝑊 → 𝐴 ∈ V) | |
3 | resexg 4924 | . . . 4 ⊢ (𝑆 ∈ V → (𝑆 ↾ (V ∖ dom {𝐴})) ∈ V) | |
4 | snexg 4163 | . . . 4 ⊢ (𝐴 ∈ V → {𝐴} ∈ V) | |
5 | unexg 4421 | . . . 4 ⊢ (((𝑆 ↾ (V ∖ dom {𝐴})) ∈ V ∧ {𝐴} ∈ V) → ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) | |
6 | 3, 4, 5 | syl2an 287 | . . 3 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V) → ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) |
7 | simpl 108 | . . . . . 6 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → 𝑠 = 𝑆) | |
8 | simpr 109 | . . . . . . . . 9 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → 𝑒 = 𝐴) | |
9 | 8 | sneqd 3589 | . . . . . . . 8 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → {𝑒} = {𝐴}) |
10 | 9 | dmeqd 4806 | . . . . . . 7 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → dom {𝑒} = dom {𝐴}) |
11 | 10 | difeq2d 3240 | . . . . . 6 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → (V ∖ dom {𝑒}) = (V ∖ dom {𝐴})) |
12 | 7, 11 | reseq12d 4885 | . . . . 5 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → (𝑠 ↾ (V ∖ dom {𝑒})) = (𝑆 ↾ (V ∖ dom {𝐴}))) |
13 | 12, 9 | uneq12d 3277 | . . . 4 ⊢ ((𝑠 = 𝑆 ∧ 𝑒 = 𝐴) → ((𝑠 ↾ (V ∖ dom {𝑒})) ∪ {𝑒}) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
14 | df-sets 12401 | . . . 4 ⊢ sSet = (𝑠 ∈ V, 𝑒 ∈ V ↦ ((𝑠 ↾ (V ∖ dom {𝑒})) ∪ {𝑒})) | |
15 | 13, 14 | ovmpoga 5971 | . . 3 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V ∧ ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴}) ∈ V) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
16 | 6, 15 | mpd3an3 1328 | . 2 ⊢ ((𝑆 ∈ V ∧ 𝐴 ∈ V) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
17 | 1, 2, 16 | syl2an 287 | 1 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊) → (𝑆 sSet 𝐴) = ((𝑆 ↾ (V ∖ dom {𝐴})) ∪ {𝐴})) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∧ wa 103 = wceq 1343 ∈ wcel 2136 Vcvv 2726 ∖ cdif 3113 ∪ cun 3114 {csn 3576 dom cdm 4604 ↾ cres 4606 (class class class)co 5842 sSet csts 12392 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-sep 4100 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 |
This theorem depends on definitions: df-bi 116 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-ral 2449 df-rex 2450 df-rab 2453 df-v 2728 df-sbc 2952 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-br 3983 df-opab 4044 df-id 4271 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-res 4616 df-iota 5153 df-fun 5190 df-fv 5196 df-ov 5845 df-oprab 5846 df-mpo 5847 df-sets 12401 |
This theorem is referenced by: setsvala 12425 setsfun 12429 setsfun0 12430 setsresg 12432 |
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