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| Mirrors > Home > MPE Home > Th. List > rankuniss | Structured version Visualization version GIF version | ||
| Description: Upper bound of the rank of a union. Part of Exercise 30 of [Enderton] p. 207. (Contributed by NM, 30-Nov-2003.) |
| Ref | Expression |
|---|---|
| rankr1b.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| rankuniss | ⊢ (rank‘∪ 𝐴) ⊆ (rank‘𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rankuni 9776 | . 2 ⊢ (rank‘∪ 𝐴) = ∪ (rank‘𝐴) | |
| 2 | rankon 9708 | . . . 4 ⊢ (rank‘𝐴) ∈ On | |
| 3 | 2 | onordi 6425 | . . 3 ⊢ Ord (rank‘𝐴) |
| 4 | orduniss 6411 | . . 3 ⊢ (Ord (rank‘𝐴) → ∪ (rank‘𝐴) ⊆ (rank‘𝐴)) | |
| 5 | 3, 4 | ax-mp 5 | . 2 ⊢ ∪ (rank‘𝐴) ⊆ (rank‘𝐴) |
| 6 | 1, 5 | eqsstri 3963 | 1 ⊢ (rank‘∪ 𝐴) ⊆ (rank‘𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 Vcvv 3427 ⊆ wss 3885 ∪ cuni 4840 Ord word 6311 ‘cfv 6487 rankcrnk 9676 |
| 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 2184 ax-ext 2707 ax-rep 5201 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 ax-reg 9496 ax-inf2 9551 |
| 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-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-reu 3341 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-op 4564 df-uni 4841 df-int 4880 df-iun 4925 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-pred 6254 df-ord 6315 df-on 6316 df-lim 6317 df-suc 6318 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-r1 9677 df-rank 9678 |
| This theorem is referenced by: rankc1 9783 rankxpl 9788 |
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