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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 9141 | . 2 ⊢ ω = (On ∩ Fin) | |
| 2 | ineq2 4166 | . . 3 ⊢ (Fin = V → (On ∩ Fin) = (On ∩ V)) | |
| 3 | inv1 4350 | . . 3 ⊢ (On ∩ V) = On | |
| 4 | 2, 3 | eqtrdi 2787 | . 2 ⊢ (Fin = V → (On ∩ Fin) = On) |
| 5 | 1, 4 | eqtrid 2783 | 1 ⊢ (Fin = V → ω = On) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 Vcvv 3440 ∩ cin 3900 Oncon0 6317 ωcom 7808 Fincfn 8883 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 ax-un 7680 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 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 7809 df-1o 8397 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 |
| This theorem is referenced by: fineqvomonb 35275 fineqvr1ombregs 35294 |
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