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| Mirrors > Home > ILE Home > Th. List > setsabsd | GIF version | ||
| Description: Replacing the same components twice yields the same as the second setting only. (Contributed by Mario Carneiro, 2-Dec-2014.) (Revised by Jim Kingdon, 22-Jan-2023.) |
| Ref | Expression |
|---|---|
| setsabsd.s | ⊢ (𝜑 → 𝑆 ∈ 𝑉) |
| setsabsd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑊) |
| setsabsd.b | ⊢ (𝜑 → 𝐵 ∈ 𝑋) |
| setsabsd.c | ⊢ (𝜑 → 𝐶 ∈ 𝑈) |
| Ref | Expression |
|---|---|
| setsabsd | ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (𝑆 sSet 〈𝐴, 𝐶〉)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | setsabsd.s | . . . 4 ⊢ (𝜑 → 𝑆 ∈ 𝑉) | |
| 2 | setsabsd.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ 𝑊) | |
| 3 | setsabsd.b | . . . 4 ⊢ (𝜑 → 𝐵 ∈ 𝑋) | |
| 4 | setsresg 13373 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐵 ∈ 𝑋) → ((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴}))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1278 | . . 3 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴}))) |
| 6 | 5 | uneq1d 3382 | . 2 ⊢ (𝜑 → (((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉}) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 7 | setsex 13367 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐵 ∈ 𝑋) → (𝑆 sSet 〈𝐴, 𝐵〉) ∈ V) | |
| 8 | 1, 2, 3, 7 | syl3anc 1278 | . . 3 ⊢ (𝜑 → (𝑆 sSet 〈𝐴, 𝐵〉) ∈ V) |
| 9 | setsabsd.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑈) | |
| 10 | setsvala 13366 | . . 3 ⊢ (((𝑆 sSet 〈𝐴, 𝐵〉) ∈ V ∧ 𝐴 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) | |
| 11 | 8, 2, 9, 10 | syl3anc 1278 | . 2 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 12 | setsvala 13366 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (𝑆 sSet 〈𝐴, 𝐶〉) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) | |
| 13 | 1, 2, 9, 12 | syl3anc 1278 | . 2 ⊢ (𝜑 → (𝑆 sSet 〈𝐴, 𝐶〉) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 14 | 6, 11, 13 | 3eqtr4d 2281 | 1 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (𝑆 sSet 〈𝐴, 𝐶〉)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1402 ∈ wcel 2209 Vcvv 2821 ∖ cdif 3217 ∪ cun 3218 {csn 3708 〈cop 3711 ↾ cres 4774 (class class class)co 6079 sSet csts 13333 |
| 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 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4247 ax-pow 4309 ax-pr 4344 ax-un 4576 ax-setind 4682 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-ral 2533 df-rex 2534 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-nul 3521 df-pw 3690 df-sn 3714 df-pr 3715 df-op 3717 df-uni 3934 df-br 4129 df-opab 4191 df-id 4436 df-xp 4778 df-rel 4779 df-cnv 4780 df-co 4781 df-dm 4782 df-res 4784 df-iota 5335 df-fun 5377 df-fv 5383 df-ov 6082 df-oprab 6083 df-mpo 6084 df-sets 13342 |
| This theorem is referenced by: ressressg 13412 |
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