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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 4589 | . 2 ⊢ {𝐴, 𝐵, 𝐶} = ({𝐴, 𝐵} ∪ {𝐶}) | |
| 2 | prfi 9319 | . . 3 ⊢ {𝐴, 𝐵} ∈ Fin | |
| 3 | snfi 9075 | . . 3 ⊢ {𝐶} ∈ Fin | |
| 4 | unfi 9190 | . . 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 2856 | 1 ⊢ {𝐴, 𝐵, 𝐶} ∈ Fin |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 ∪ cun 4149 {csn 4584 {cpr 4586 {ctp 4588 Fincfn 8977 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pr 5390 ax-un 7752 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-om 7879 df-1o 8480 df-2o 8481 df-en 8978 df-fin 8981 |
| This theorem is used by: hash7g 14635 hashge3el3dif 14636 tpf1o 14650 s7f1o 15125 sumtp 15921 lcmftp 16817 perfectlem2 27563 prodtp 33465 gsumtp 33672 constrlccllem 34432 constrcccllem 34433 hgt750lemg 35330 limsupequzlem 46826 fourierdlem102 47312 fourierdlem114 47324 etransclem48 47386 perfectALTVlem2 48914 |
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