| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > rankxpu | Structured version Visualization version GIF version | ||
| Description: An upper bound on the rank of a Cartesian product. (Contributed by NM, 18-Sep-2006.) |
| Ref | Expression |
|---|---|
| rankxpl.1 | ⊢ 𝐴 ∈ V |
| rankxpl.2 | ⊢ 𝐵 ∈ V |
| Ref | Expression |
|---|---|
| rankxpu | ⊢ (rank‘(𝐴 × 𝐵)) ⊆ suc suc (rank‘(𝐴 ∪ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xpsspw 5753 | . . 3 ⊢ (𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) | |
| 2 | rankxpl.1 | . . . . . . 7 ⊢ 𝐴 ∈ V | |
| 3 | rankxpl.2 | . . . . . . 7 ⊢ 𝐵 ∈ V | |
| 4 | 2, 3 | unex 7683 | . . . . . 6 ⊢ (𝐴 ∪ 𝐵) ∈ V |
| 5 | 4 | pwex 5320 | . . . . 5 ⊢ 𝒫 (𝐴 ∪ 𝐵) ∈ V |
| 6 | 5 | pwex 5320 | . . . 4 ⊢ 𝒫 𝒫 (𝐴 ∪ 𝐵) ∈ V |
| 7 | 6 | rankss 9748 | . . 3 ⊢ ((𝐴 × 𝐵) ⊆ 𝒫 𝒫 (𝐴 ∪ 𝐵) → (rank‘(𝐴 × 𝐵)) ⊆ (rank‘𝒫 𝒫 (𝐴 ∪ 𝐵))) |
| 8 | 1, 7 | ax-mp 5 | . 2 ⊢ (rank‘(𝐴 × 𝐵)) ⊆ (rank‘𝒫 𝒫 (𝐴 ∪ 𝐵)) |
| 9 | 5 | rankpw 9742 | . . 3 ⊢ (rank‘𝒫 𝒫 (𝐴 ∪ 𝐵)) = suc (rank‘𝒫 (𝐴 ∪ 𝐵)) |
| 10 | 4 | rankpw 9742 | . . . 4 ⊢ (rank‘𝒫 (𝐴 ∪ 𝐵)) = suc (rank‘(𝐴 ∪ 𝐵)) |
| 11 | suceq 6380 | . . . 4 ⊢ ((rank‘𝒫 (𝐴 ∪ 𝐵)) = suc (rank‘(𝐴 ∪ 𝐵)) → suc (rank‘𝒫 (𝐴 ∪ 𝐵)) = suc suc (rank‘(𝐴 ∪ 𝐵))) | |
| 12 | 10, 11 | ax-mp 5 | . . 3 ⊢ suc (rank‘𝒫 (𝐴 ∪ 𝐵)) = suc suc (rank‘(𝐴 ∪ 𝐵)) |
| 13 | 9, 12 | eqtri 2754 | . 2 ⊢ (rank‘𝒫 𝒫 (𝐴 ∪ 𝐵)) = suc suc (rank‘(𝐴 ∪ 𝐵)) |
| 14 | 8, 13 | sseqtri 3978 | 1 ⊢ (rank‘(𝐴 × 𝐵)) ⊆ suc suc (rank‘(𝐴 ∪ 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1541 ∈ wcel 2111 Vcvv 3436 ∪ cun 3895 ⊆ wss 3897 𝒫 cpw 4549 × cxp 5617 suc csuc 6314 ‘cfv 6487 rankcrnk 9662 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-10 2144 ax-11 2160 ax-12 2180 ax-ext 2703 ax-rep 5219 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-reg 9484 ax-inf2 9537 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2535 df-eu 2564 df-clab 2710 df-cleq 2723 df-clel 2806 df-nfc 2881 df-ne 2929 df-ral 3048 df-rex 3057 df-reu 3347 df-rab 3396 df-v 3438 df-sbc 3737 df-csb 3846 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-pss 3917 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-int 4898 df-iun 4943 df-br 5094 df-opab 5156 df-mpt 5175 df-tr 5201 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 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 7355 df-om 7803 df-2nd 7928 df-frecs 8217 df-wrecs 8248 df-recs 8297 df-rdg 8335 df-r1 9663 df-rank 9664 |
| This theorem is referenced by: rankfu 9776 rankmapu 9777 rankxplim3 9780 |
| Copyright terms: Public domain | W3C validator |