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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 6359 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
| 2 | eloni 6359 | . 2 ⊢ (𝐵 ∈ On → Ord 𝐵) | |
| 3 | ordelssne 6376 | . 2 ⊢ ((Ord 𝐴 ∧ Ord 𝐵) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) | |
| 4 | 1, 2, 3 | syl2an 607 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2145 ≠ wne 2960 ⊆ wss 3907 Ord word 6348 Oncon0 6349 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 ax-sep 5250 ax-pr 5394 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-br 5105 df-opab 5167 df-tr 5212 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-ord 6352 df-on 6353 |
| This theorem is referenced by: tfindsg 7845 findsg 7882 oancom 9608 cardsdom2 9962 alephord 10047 cutbdaylt 27945 omabs2 43916 naddwordnexlem4 43985 omssrncard 44123 |
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