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| Mirrors > Home > MPE Home > Th. List > onelpss | Structured version Visualization version GIF version | ||
| Description: Relationship between membership and proper subset of an ordinal number. (Contributed by NM, 15-Sep-1995.) |
| Ref | Expression |
|---|---|
| onelpss | ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eloni 6321 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | eloni 6321 | . 2 ⊢ (𝐵 ∈ On → Ord 𝐵) | |
| 3 | ordelssne 6338 | . 2 ⊢ ((Ord 𝐴 ∧ Ord 𝐵) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) | |
| 4 | 1, 2, 3 | syl2an 596 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2109 ≠ wne 2925 ⊆ wss 3905 Ord word 6310 Oncon0 6311 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-ext 2701 ax-sep 5238 ax-nul 5248 ax-pr 5374 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-sb 2066 df-clab 2708 df-cleq 2721 df-clel 2803 df-ne 2926 df-ral 3045 df-rex 3054 df-rab 3397 df-v 3440 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-op 4586 df-uni 4862 df-br 5096 df-opab 5158 df-tr 5203 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-we 5578 df-ord 6314 df-on 6315 |
| This theorem is referenced by: tfindsg 7801 findsg 7837 oancom 9566 cardsdom2 9903 alephord 9988 scutbdaylt 27747 omabs2 43305 naddwordnexlem4 43374 omssrncard 43513 |
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