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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 13125 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐵 ∈ 𝑋) → ((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴}))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1273 | . . 3 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) = (𝑆 ↾ (V ∖ {𝐴}))) |
| 6 | 5 | uneq1d 3360 | . 2 ⊢ (𝜑 → (((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉}) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 7 | setsex 13119 | . . . 4 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐵 ∈ 𝑋) → (𝑆 sSet 〈𝐴, 𝐵〉) ∈ V) | |
| 8 | 1, 2, 3, 7 | syl3anc 1273 | . . 3 ⊢ (𝜑 → (𝑆 sSet 〈𝐴, 𝐵〉) ∈ V) |
| 9 | setsabsd.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ 𝑈) | |
| 10 | setsvala 13118 | . . 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 1273 | . 2 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (((𝑆 sSet 〈𝐴, 𝐵〉) ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 12 | setsvala 13118 | . . 3 ⊢ ((𝑆 ∈ 𝑉 ∧ 𝐴 ∈ 𝑊 ∧ 𝐶 ∈ 𝑈) → (𝑆 sSet 〈𝐴, 𝐶〉) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) | |
| 13 | 1, 2, 9, 12 | syl3anc 1273 | . 2 ⊢ (𝜑 → (𝑆 sSet 〈𝐴, 𝐶〉) = ((𝑆 ↾ (V ∖ {𝐴})) ∪ {〈𝐴, 𝐶〉})) |
| 14 | 6, 11, 13 | 3eqtr4d 2274 | 1 ⊢ (𝜑 → ((𝑆 sSet 〈𝐴, 𝐵〉) sSet 〈𝐴, 𝐶〉) = (𝑆 sSet 〈𝐴, 𝐶〉)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1397 ∈ wcel 2202 Vcvv 2802 ∖ cdif 3197 ∪ cun 3198 {csn 3669 〈cop 3672 ↾ cres 4727 (class class class)co 6018 sSet csts 13085 |
| 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 619 ax-in2 620 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-pow 4264 ax-pr 4299 ax-un 4530 ax-setind 4635 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-fal 1403 df-nf 1509 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ne 2403 df-ral 2515 df-rex 2516 df-rab 2519 df-v 2804 df-sbc 3032 df-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-br 4089 df-opab 4151 df-id 4390 df-xp 4731 df-rel 4732 df-cnv 4733 df-co 4734 df-dm 4735 df-res 4737 df-iota 5286 df-fun 5328 df-fv 5334 df-ov 6021 df-oprab 6022 df-mpo 6023 df-sets 13094 |
| This theorem is referenced by: ressressg 13163 |
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