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| Mirrors > Home > ILE Home > Th. List > elnmz | GIF version | ||
| Description: Elementhood in the normalizer. (Contributed by Mario Carneiro, 18-Jan-2015.) |
| Ref | Expression |
|---|---|
| elnmz.1 | ⊢ 𝑁 = {𝑥 ∈ 𝑋 ∣ ∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑦 + 𝑥) ∈ 𝑆)} |
| Ref | Expression |
|---|---|
| elnmz | ⊢ (𝐴 ∈ 𝑁 ↔ (𝐴 ∈ 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝐴 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq2 6008 | . . . . . 6 ⊢ (𝑦 = 𝑧 → (𝑥 + 𝑦) = (𝑥 + 𝑧)) | |
| 2 | 1 | eleq1d 2298 | . . . . 5 ⊢ (𝑦 = 𝑧 → ((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑥 + 𝑧) ∈ 𝑆)) |
| 3 | oveq1 6007 | . . . . . 6 ⊢ (𝑦 = 𝑧 → (𝑦 + 𝑥) = (𝑧 + 𝑥)) | |
| 4 | 3 | eleq1d 2298 | . . . . 5 ⊢ (𝑦 = 𝑧 → ((𝑦 + 𝑥) ∈ 𝑆 ↔ (𝑧 + 𝑥) ∈ 𝑆)) |
| 5 | 2, 4 | bibi12d 235 | . . . 4 ⊢ (𝑦 = 𝑧 → (((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑦 + 𝑥) ∈ 𝑆) ↔ ((𝑥 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝑥) ∈ 𝑆))) |
| 6 | 5 | cbvralvw 2769 | . . 3 ⊢ (∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑦 + 𝑥) ∈ 𝑆) ↔ ∀𝑧 ∈ 𝑋 ((𝑥 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝑥) ∈ 𝑆)) |
| 7 | oveq1 6007 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝑥 + 𝑧) = (𝐴 + 𝑧)) | |
| 8 | 7 | eleq1d 2298 | . . . . 5 ⊢ (𝑥 = 𝐴 → ((𝑥 + 𝑧) ∈ 𝑆 ↔ (𝐴 + 𝑧) ∈ 𝑆)) |
| 9 | oveq2 6008 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝑧 + 𝑥) = (𝑧 + 𝐴)) | |
| 10 | 9 | eleq1d 2298 | . . . . 5 ⊢ (𝑥 = 𝐴 → ((𝑧 + 𝑥) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆)) |
| 11 | 8, 10 | bibi12d 235 | . . . 4 ⊢ (𝑥 = 𝐴 → (((𝑥 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝑥) ∈ 𝑆) ↔ ((𝐴 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆))) |
| 12 | 11 | ralbidv 2530 | . . 3 ⊢ (𝑥 = 𝐴 → (∀𝑧 ∈ 𝑋 ((𝑥 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝑥) ∈ 𝑆) ↔ ∀𝑧 ∈ 𝑋 ((𝐴 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆))) |
| 13 | 6, 12 | bitrid 192 | . 2 ⊢ (𝑥 = 𝐴 → (∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑦 + 𝑥) ∈ 𝑆) ↔ ∀𝑧 ∈ 𝑋 ((𝐴 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆))) |
| 14 | elnmz.1 | . 2 ⊢ 𝑁 = {𝑥 ∈ 𝑋 ∣ ∀𝑦 ∈ 𝑋 ((𝑥 + 𝑦) ∈ 𝑆 ↔ (𝑦 + 𝑥) ∈ 𝑆)} | |
| 15 | 13, 14 | elrab2 2962 | 1 ⊢ (𝐴 ∈ 𝑁 ↔ (𝐴 ∈ 𝑋 ∧ ∀𝑧 ∈ 𝑋 ((𝐴 + 𝑧) ∈ 𝑆 ↔ (𝑧 + 𝐴) ∈ 𝑆))) |
| Colors of variables: wff set class |
| Syntax hints: ∧ wa 104 ↔ wb 105 = wceq 1395 ∈ wcel 2200 ∀wral 2508 {crab 2512 (class class class)co 6000 |
| 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-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-rab 2517 df-v 2801 df-un 3201 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3888 df-br 4083 df-iota 5277 df-fv 5325 df-ov 6003 |
| This theorem is referenced by: nmzbi 13741 nmzsubg 13742 ssnmz 13743 conjnmzb 13812 |
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