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| Mirrors > Home > MPE Home > Th. List > Mathboxes > mnurnd | Structured version Visualization version GIF version | ||
| Description: Minimal universes contain ranges of functions from an element of the universe to the universe. (Contributed by Rohan Ridenour, 13-Aug-2023.) |
| Ref | Expression |
|---|---|
| mnurnd.1 | ⊢ 𝑀 = {𝑘 ∣ ∀𝑙 ∈ 𝑘 (𝒫 𝑙 ⊆ 𝑘 ∧ ∀𝑚∃𝑛 ∈ 𝑘 (𝒫 𝑙 ⊆ 𝑛 ∧ ∀𝑝 ∈ 𝑙 (∃𝑞 ∈ 𝑘 (𝑝 ∈ 𝑞 ∧ 𝑞 ∈ 𝑚) → ∃𝑟 ∈ 𝑚 (𝑝 ∈ 𝑟 ∧ ∪ 𝑟 ⊆ 𝑛))))} |
| mnurnd.2 | ⊢ (𝜑 → 𝑈 ∈ 𝑀) |
| mnurnd.3 | ⊢ (𝜑 → 𝐴 ∈ 𝑈) |
| mnurnd.4 | ⊢ (𝜑 → 𝐹:𝐴⟶𝑈) |
| Ref | Expression |
|---|---|
| mnurnd | ⊢ (𝜑 → ran 𝐹 ∈ 𝑈) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mnurnd.1 | . 2 ⊢ 𝑀 = {𝑘 ∣ ∀𝑙 ∈ 𝑘 (𝒫 𝑙 ⊆ 𝑘 ∧ ∀𝑚∃𝑛 ∈ 𝑘 (𝒫 𝑙 ⊆ 𝑛 ∧ ∀𝑝 ∈ 𝑙 (∃𝑞 ∈ 𝑘 (𝑝 ∈ 𝑞 ∧ 𝑞 ∈ 𝑚) → ∃𝑟 ∈ 𝑚 (𝑝 ∈ 𝑟 ∧ ∪ 𝑟 ⊆ 𝑛))))} | |
| 2 | mnurnd.2 | . 2 ⊢ (𝜑 → 𝑈 ∈ 𝑀) | |
| 3 | mnurnd.3 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑈) | |
| 4 | 3 | elexd 3478 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ V) |
| 5 | 4 | iftrued 4496 | . . 3 ⊢ (𝜑 → if(𝐴 ∈ V, 𝐴, ∅) = 𝐴) |
| 6 | 5, 3 | eqeltrd 2863 | . 2 ⊢ (𝜑 → if(𝐴 ∈ V, 𝐴, ∅) ∈ 𝑈) |
| 7 | mnurnd.4 | . . 3 ⊢ (𝜑 → 𝐹:𝐴⟶𝑈) | |
| 8 | 5 | feq2d 6691 | . . 3 ⊢ (𝜑 → (𝐹:if(𝐴 ∈ V, 𝐴, ∅)⟶𝑈 ↔ 𝐹:𝐴⟶𝑈)) |
| 9 | 7, 8 | mpbird 260 | . 2 ⊢ (𝜑 → 𝐹:if(𝐴 ∈ V, 𝐴, ∅)⟶𝑈) |
| 10 | 0ex 5271 | . . 3 ⊢ ∅ ∈ V | |
| 11 | 10 | elimel 4558 | . 2 ⊢ if(𝐴 ∈ V, 𝐴, ∅) ∈ V |
| 12 | 1, 2, 6, 9, 11 | mnurndlem2 44975 | 1 ⊢ (𝜑 → ran 𝐹 ∈ 𝑈) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∀wal 1568 = wceq 1570 ∈ wcel 2143 {cab 2741 ∀wral 3079 ∃wrex 3089 Vcvv 3455 ⊆ wss 3906 ∅c0 4287 ifcif 4488 𝒫 cpw 4563 ∪ cuni 4873 ran crn 5664 ⟶wf 6534 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pr 5406 ax-reg 9555 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-eprel 5563 df-fr 5616 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-fv 6546 |
| This theorem is referenced by: mnugrud 44977 |
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