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| Mirrors > Home > MPE Home > Th. List > Mathboxes > fineqvomon | Structured version Visualization version GIF version | ||
| Description: If all sets are finite, then the class of all natural numbers equals the proper class of all ordinal numbers. (Contributed by BTernaryTau, 30-Dec-2025.) |
| Ref | Expression |
|---|---|
| fineqvomon | ⊢ (Fin = V → ω = On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | onfin2 9144 | . 2 ⊢ ω = (On ∩ Fin) | |
| 2 | ineq2 4155 | . . 3 ⊢ (Fin = V → (On ∩ Fin) = (On ∩ V)) | |
| 3 | inv1 4339 | . . 3 ⊢ (On ∩ V) = On | |
| 4 | 2, 3 | eqtrdi 2788 | . 2 ⊢ (Fin = V → (On ∩ Fin) = On) |
| 5 | 1, 4 | eqtrid 2784 | 1 ⊢ (Fin = V → ω = On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 Vcvv 3430 ∩ cin 3889 Oncon0 6317 ωcom 7810 Fincfn 8886 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pr 5370 ax-un 7682 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-om 7811 df-1o 8398 df-en 8887 df-dom 8888 df-sdom 8889 df-fin 8890 |
| This theorem is referenced by: fineqvomonb 35279 fineqvr1ombregs 35298 |
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