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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iinfssclem3 | Structured version Visualization version GIF version | ||
| Description: Lemma for iinfssc 49416. (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 49413 | . 2 ⊢ (𝜑 → 𝐾 = (𝑧 ∈ ∩ 𝑥 ∈ 𝐴 𝑆, 𝑤 ∈ ∩ 𝑥 ∈ 𝐴 𝑆 ↦ ∩ 𝑥 ∈ 𝐴 (𝑧𝐻𝑤))) |
| 7 | nfv 1916 | . . . 4 ⊢ Ⅎ𝑥(𝑧 = 𝑋 ∧ 𝑤 = 𝑌) | |
| 8 | 5, 7 | nfan 1901 | . . 3 ⊢ Ⅎ𝑥(𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) |
| 9 | simplrl 777 | . . . 4 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → 𝑧 = 𝑋) | |
| 10 | simplrr 778 | . . . 4 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → 𝑤 = 𝑌) | |
| 11 | 9, 10 | oveq12d 7386 | . . 3 ⊢ (((𝜑 ∧ (𝑧 = 𝑋 ∧ 𝑤 = 𝑌)) ∧ 𝑥 ∈ 𝐴) → (𝑧𝐻𝑤) = (𝑋𝐻𝑌)) |
| 12 | 8, 11 | iineq2d 4972 | . 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 7401 | . . . 4 ⊢ (𝑋𝐻𝑌) ∈ V | |
| 16 | 15 | rgenw 3056 | . . 3 ⊢ ∀𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V |
| 17 | iinexg 5295 | . . 3 ⊢ ((𝐴 ≠ ∅ ∧ ∀𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) → ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) | |
| 18 | 1, 16, 17 | sylancl 587 | . 2 ⊢ (𝜑 → ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌) ∈ V) |
| 19 | 6, 12, 13, 14, 18 | ovmpod 7520 | 1 ⊢ (𝜑 → (𝑋𝐾𝑌) = ∩ 𝑥 ∈ 𝐴 (𝑋𝐻𝑌)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 Ⅎwnf 1785 ∈ wcel 2114 ≠ wne 2933 ∀wral 3052 Vcvv 3442 ∅c0 4287 ∩ ciin 4949 class class class wbr 5100 ↦ cmpt 5181 dom cdm 5632 ‘cfv 6500 (class class class)co 7368 ⊆cat cssc 17743 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-int 4905 df-iun 4950 df-iin 4951 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-oprab 7372 df-mpo 7373 df-ixp 8848 df-ssc 17746 |
| This theorem is referenced by: iinfsubc 49417 |
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