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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iinfssclem3 | Structured version Visualization version GIF version | ||
| Description: Lemma for iinfssc 49182. (Contributed by Zhi Wang, 31-Oct-2025.) |
| Ref | Expression |
|---|---|
| iinfssc.1 | ⊢ (𝜑 → 𝐴 ≠ ∅) |
| iinfssc.2 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐻 ⊆cat 𝐽) |
| iinfssc.3 | ⊢ (𝜑 → 𝐾 = (𝑦 ∈ ∩ 𝑥 ∈ 𝐴 dom 𝐻 ↦ ∩ 𝑥 ∈ 𝐴 (𝐻‘𝑦))) |
| iinfssclem1.4 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑆 = dom dom 𝐻) |
| iinfssclem1.5 | ⊢ Ⅎ𝑥𝜑 |
| iinfssclem3.x | ⊢ (𝜑 → 𝑋 ∈ ∩ 𝑥 ∈ 𝐴 𝑆) |
| iinfssclem3.y | ⊢ (𝜑 → 𝑌 ∈ ∩ 𝑥 ∈ 𝐴 𝑆) |
| Ref | Expression |
|---|---|
| iinfssclem3 | ⊢ (𝜑 → (𝑋𝐾𝑌) = ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iinfssc.1 | . . 3 ⊢ (𝜑 → 𝐴 ≠ ∅) | |
| 2 | iinfssc.2 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐻 ⊆cat 𝐽) | |
| 3 | iinfssc.3 | . . 3 ⊢ (𝜑 → 𝐾 = (𝑦 ∈ ∩ 𝑥 ∈ 𝐴 dom 𝐻 ↦ ∩ 𝑥 ∈ 𝐴 (𝐻‘𝑦))) | |
| 4 | iinfssclem1.4 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑆 = dom dom 𝐻) | |
| 5 | iinfssclem1.5 | . . 3 ⊢ Ⅎ𝑥𝜑 | |
| 6 | 1, 2, 3, 4, 5 | iinfssclem1 49179 | . 2 ⊢ (𝜑 → 𝐾 = (𝑧 ∈ ∩ 𝑥 ∈ 𝐴 𝑆, 𝑤 ∈ ∩ 𝑥 ∈ 𝐴 𝑆 ↦ ∩ 𝑥 ∈ 𝐴 (𝑧𝐻𝑤))) |
| 7 | nfv 1915 | . . . 4 ⊢ Ⅎ𝑥(𝑧 = 𝑋 ∧ 𝑤 = 𝑌) | |
| 8 | 5, 7 | nfan 1900 | . . 3 ⊢ Ⅎ𝑥(𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) |
| 9 | simplrl 776 | . . . 4 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → 𝑧 = 𝑋) | |
| 10 | simplrr 777 | . . . 4 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → 𝑤 = 𝑌) | |
| 11 | 9, 10 | oveq12d 7370 | . . 3 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → (𝑧𝐻𝑤) = (𝑋𝐻𝑌)) |
| 12 | 8, 11 | iineq2d 4965 | . 2 ⊢ ((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) → ∩ 𝑥 ∈ 𝐴 (𝑧𝐻𝑤) = ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌)) |
| 13 | iinfssclem3.x | . 2 ⊢ (𝜑 → 𝑋 ∈ ∩ 𝑥 ∈ 𝐴 𝑆) | |
| 14 | iinfssclem3.y | . 2 ⊢ (𝜑 → 𝑌 ∈ ∩ 𝑥 ∈ 𝐴 𝑆) | |
| 15 | ovex 7385 | . . . 4 ⊢ (𝑋𝐻𝑌) ∈ V | |
| 16 | 15 | rgenw 3052 | . . 3 ⊢ ∀𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V |
| 17 | iinexg 5288 | . . 3 ⊢ ((𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) → ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) | |
| 18 | 1, 16, 17 | sylancl 586 | . 2 ⊢ (𝜑 → ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) |
| 19 | 6, 12, 13, 14, 18 | ovmpod 7504 | 1 ⊢ (𝜑 → (𝑋𝐾𝑌) = ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 Ⅎwnf 1784 ∈ wcel 2113 ≠ wne 2929 ∀wral 3048 Vcvv 3437 ∅c0 4282 ∩ ciin 4942 class class class wbr 5093 ↦ cmpt 5174 dom cdm 5619 ‘cfv 6486 (class class class)co 7352 ⊆cat cssc 17716 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-int 4898 df-iun 4943 df-iin 4944 df-br 5094 df-opab 5156 df-mpt 5175 df-id 5514 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-ov 7355 df-oprab 7356 df-mpo 7357 df-ixp 8828 df-ssc 17719 |
| This theorem is referenced by: iinfsubc 49183 |
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