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| Mirrors > Home > MPE Home > Th. List > Mathboxes > iunordi | Structured version Visualization version GIF version | ||
| Description: The indexed union of a collection of ordinal numbers 𝐵(𝑥) is ordinal. (Contributed by Emmett Weisz, 3-Nov-2019.) |
| Ref | Expression |
|---|---|
| iunordi.B | ⊢ Ord 𝐵 |
| Ref | Expression |
|---|---|
| iunordi | ⊢ Ord ∪ 𝑥 ∈ 𝐴 𝐵 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | iunord 50109 | . 2 ⊢ (∀𝑥 ∈ 𝐴 Ord 𝐵 → Ord ∪ 𝑥 ∈ 𝐴 𝐵) | |
| 2 | iunordi.B | . . 3 ⊢ Ord 𝐵 | |
| 3 | 2 | a1i 11 | . 2 ⊢ (𝑥 ∈ 𝐴 → Ord 𝐵) |
| 4 | 1, 3 | mprg 3058 | 1 ⊢ Ord ∪ 𝑥 ∈ 𝐴 𝐵 |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ∪ ciun 4934 Ord word 6314 |
| 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-sep 5231 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-tr 5194 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-ord 6318 df-on 6319 |
| This theorem is referenced by: (None) |
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