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| Mirrors > Home > MPE Home > Th. List > rankbnd | Structured version Visualization version GIF version | ||
| Description: The rank of a set is bounded by a bound for the successor of its members. (Contributed by NM, 18-Sep-2006.) |
| Ref | Expression |
|---|---|
| rankr1b.1 | ⊢ 𝐴 ∈ V |
| Ref | Expression |
|---|---|
| rankbnd | ⊢ (∀𝑥 ∈ 𝐴 suc (rank‘𝑥) ⊆ 𝐵 ↔ (rank‘𝐴) ⊆ 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rankr1b.1 | . . . 4 ⊢ 𝐴 ∈ V | |
| 2 | 1 | rankval4 9835 | . . 3 ⊢ (rank‘𝐴) = ∪ 𝑥 ∈ 𝐴 suc (rank‘𝑥) |
| 3 | 2 | sseq1i 3965 | . 2 ⊢ ((rank‘𝐴) ⊆ 𝐵 ↔ ∪ 𝑥 ∈ 𝐴 suc (rank‘𝑥) ⊆ 𝐵) |
| 4 | iunss 5009 | . 2 ⊢ (∪ 𝑥 ∈ 𝐴 suc (rank‘𝑥) ⊆ 𝐵 ↔ ∀𝑥 ∈ 𝐴 suc (rank‘𝑥) ⊆ 𝐵) | |
| 5 | 3, 4 | bitr2i 279 | 1 ⊢ (∀𝑥 ∈ 𝐴 suc (rank‘𝑥) ⊆ 𝐵 ↔ (rank‘𝐴) ⊆ 𝐵) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∈ wcel 2143 ∀wral 3079 Vcvv 3455 ⊆ wss 3905 ∪ ciun 4956 suc csuc 6362 ‘cfv 6536 rankcrnk 9731 |
| This proof depends on 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-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-reg 9550 ax-inf2 9606 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 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-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7413 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-r1 9732 df-rank 9733 |
| This theorem is used by: rankxplim 9847 |
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