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| Mirrors > Home > MPE Home > Th. List > omelon2 | Structured version Visualization version GIF version | ||
| Description: Omega is an ordinal number. (Contributed by Mario Carneiro, 30-Jan-2013.) |
| Ref | Expression |
|---|---|
| omelon2 | ⊢ (ω ∈ V → ω ∈ On) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | omon 7872 | . . . 4 ⊢ (ω ∈ On ∨ ω = On) | |
| 2 | 1 | ori 874 | . . 3 ⊢ (¬ ω ∈ On → ω = On) |
| 3 | onprc 7775 | . . . 4 ⊢ ¬ On ∈ V | |
| 4 | eleq1 2850 | . . . 4 ⊢ (ω = On → (ω ∈ V ↔ On ∈ V)) | |
| 5 | 3, 4 | mtbiri 330 | . . 3 ⊢ (ω = On → ¬ ω ∈ V) |
| 6 | 2, 5 | syl 18 | . 2 ⊢ (¬ ω ∈ On → ¬ ω ∈ V) |
| 7 | 6 | con4i 115 | 1 ⊢ (ω ∈ V → ω ∈ On) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 = wceq 1569 ∈ wcel 2142 Vcvv 3454 Oncon0 6360 ωcom 7860 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5256 ax-pr 5403 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-sb 2096 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-tr 5218 df-eprel 5560 df-po 5568 df-so 5569 df-fr 5613 df-we 5615 df-ord 6363 df-on 6364 df-lim 6365 df-om 7861 |
| This theorem is used by: oaabs 8632 omelon 9613 fictb 10234 axdc3lem 10440 n0ssoldg 28557 |
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