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| Mirrors > Home > MPE Home > Th. List > Mathboxes > finonex | Structured version Visualization version GIF version | ||
| Description: The finite ordinals are a set. See also onprc 7776 and fiprc 9040 for proof that On and Fin are proper classes. (Contributed by RP, 27-Sep-2023.) |
| Ref | Expression |
|---|---|
| finonex | ⊢ (On ∩ Fin) ∈ V |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | onfin2 9200 | . 2 ⊢ ω = (On ∩ Fin) | |
| 2 | omex 9611 | . 2 ⊢ ω ∈ V | |
| 3 | 1, 2 | eqeltrri 2866 | 1 ⊢ (On ∩ Fin) ∈ V |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 Vcvv 3463 ∩ cin 3912 Oncon0 6361 ωcom 7861 Fincfn 8942 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5261 ax-nul 5271 ax-pr 5405 ax-un 7733 ax-inf2 9609 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-om 7862 df-1o 8452 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 |
| This theorem is referenced by: (None) |
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