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Mirrors > Home > MPE Home > Th. List > fin23lem15 | Structured version Visualization version GIF version |
Description: Lemma for fin23 10145. 𝑈 is a monotone function. (Contributed by Stefan O'Rear, 1-Nov-2014.) |
Ref | Expression |
---|---|
fin23lem.a | ⊢ 𝑈 = seqω((𝑖 ∈ ω, 𝑢 ∈ V ↦ if(((𝑡‘𝑖) ∩ 𝑢) = ∅, 𝑢, ((𝑡‘𝑖) ∩ 𝑢))), ∪ ran 𝑡) |
Ref | Expression |
---|---|
fin23lem15 | ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵 ⊆ 𝐴) → (𝑈‘𝐴) ⊆ (𝑈‘𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fveq2 6774 | . . 3 ⊢ (𝑏 = 𝐵 → (𝑈‘𝑏) = (𝑈‘𝐵)) | |
2 | 1 | sseq1d 3952 | . 2 ⊢ (𝑏 = 𝐵 → ((𝑈‘𝑏) ⊆ (𝑈‘𝐵) ↔ (𝑈‘𝐵) ⊆ (𝑈‘𝐵))) |
3 | fveq2 6774 | . . 3 ⊢ (𝑏 = 𝑎 → (𝑈‘𝑏) = (𝑈‘𝑎)) | |
4 | 3 | sseq1d 3952 | . 2 ⊢ (𝑏 = 𝑎 → ((𝑈‘𝑏) ⊆ (𝑈‘𝐵) ↔ (𝑈‘𝑎) ⊆ (𝑈‘𝐵))) |
5 | fveq2 6774 | . . 3 ⊢ (𝑏 = suc 𝑎 → (𝑈‘𝑏) = (𝑈‘suc 𝑎)) | |
6 | 5 | sseq1d 3952 | . 2 ⊢ (𝑏 = suc 𝑎 → ((𝑈‘𝑏) ⊆ (𝑈‘𝐵) ↔ (𝑈‘suc 𝑎) ⊆ (𝑈‘𝐵))) |
7 | fveq2 6774 | . . 3 ⊢ (𝑏 = 𝐴 → (𝑈‘𝑏) = (𝑈‘𝐴)) | |
8 | 7 | sseq1d 3952 | . 2 ⊢ (𝑏 = 𝐴 → ((𝑈‘𝑏) ⊆ (𝑈‘𝐵) ↔ (𝑈‘𝐴) ⊆ (𝑈‘𝐵))) |
9 | ssidd 3944 | . 2 ⊢ (𝐵 ∈ ω → (𝑈‘𝐵) ⊆ (𝑈‘𝐵)) | |
10 | fin23lem.a | . . . . 5 ⊢ 𝑈 = seqω((𝑖 ∈ ω, 𝑢 ∈ V ↦ if(((𝑡‘𝑖) ∩ 𝑢) = ∅, 𝑢, ((𝑡‘𝑖) ∩ 𝑢))), ∪ ran 𝑡) | |
11 | 10 | fin23lem13 10088 | . . . 4 ⊢ (𝑎 ∈ ω → (𝑈‘suc 𝑎) ⊆ (𝑈‘𝑎)) |
12 | 11 | ad2antrr 723 | . . 3 ⊢ (((𝑎 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵 ⊆ 𝑎) → (𝑈‘suc 𝑎) ⊆ (𝑈‘𝑎)) |
13 | sstr2 3928 | . . 3 ⊢ ((𝑈‘suc 𝑎) ⊆ (𝑈‘𝑎) → ((𝑈‘𝑎) ⊆ (𝑈‘𝐵) → (𝑈‘suc 𝑎) ⊆ (𝑈‘𝐵))) | |
14 | 12, 13 | syl 17 | . 2 ⊢ (((𝑎 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵 ⊆ 𝑎) → ((𝑈‘𝑎) ⊆ (𝑈‘𝐵) → (𝑈‘suc 𝑎) ⊆ (𝑈‘𝐵))) |
15 | 2, 4, 6, 8, 9, 14 | findsg 7746 | 1 ⊢ (((𝐴 ∈ ω ∧ 𝐵 ∈ ω) ∧ 𝐵 ⊆ 𝐴) → (𝑈‘𝐴) ⊆ (𝑈‘𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 Vcvv 3432 ∩ cin 3886 ⊆ wss 3887 ∅c0 4256 ifcif 4459 ∪ cuni 4839 ran crn 5590 suc csuc 6268 ‘cfv 6433 ∈ cmpo 7277 ωcom 7712 seqωcseqom 8278 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-oprab 7279 df-mpo 7280 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-seqom 8279 |
This theorem is referenced by: fin23lem16 10091 |
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