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| Mirrors > Home > MPE Home > Th. List > tpfi | Structured version Visualization version GIF version | ||
| Description: An unordered triple is finite. (Contributed by Mario Carneiro, 28-Sep-2013.) |
| Ref | Expression |
|---|---|
| tpfi | ⊢ {𝐴, 𝐵, 𝐶} ∈ Fin |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-tp 4593 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prfi 9353 | . . 3 ⊢ {𝐴, 𝐵} ∈ Fin | |
| 3 | snfi 9109 | . . 3 ⊢ {𝐶} ∈ Fin | |
| 4 | unfi 9224 | . . 3 ⊢ (({𝐴, 𝐵} ∈ Fin ∧ {𝐶} ∈ Fin) → ({𝐴, 𝐵} ∪ {𝐶}) ∈ Fin) | |
| 5 | 2, 3, 4 | mp2an 705 | . 2 ⊢ ({𝐴, 𝐵} ∪ {𝐶}) ∈ Fin |
| 6 | 1, 5 | eqeltri 2860 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ Fin |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 ∪ cun 4152 {csn 4588 {cpr 4590 {ctp 4592 Fincfn 9011 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pr 5398 ax-un 7783 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-om 7912 df-1o 8514 df-2o 8515 df-en 9012 df-fin 9015 |
| This theorem is used by: hash7g 14672 hashge3el3dif 14673 tpf1o 14687 s7f1o 15162 sumtp 15959 lcmftp 16855 perfectlem2 27614 prodtp 33514 gsumtp 33724 constrlccllem 34496 constrcccllem 34497 hgt750lemg 35394 limsupequzlem 47005 fourierdlem102 47491 fourierdlem114 47503 etransclem48 47565 perfectALTVlem2 49093 |
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