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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 6261 | . 2 ⊢ (𝐴 ∈ On → Ord 𝐴) | |
2 | eloni 6261 | . 2 ⊢ (𝐵 ∈ On → Ord 𝐵) | |
3 | ordelssne 6278 | . 2 ⊢ ((Ord 𝐴 ∧ Ord 𝐵) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) | |
4 | 1, 2, 3 | syl2an 595 | 1 ⊢ ((𝐴 ∈ On ∧ 𝐵 ∈ On) → (𝐴 ∈ 𝐵 ↔ (𝐴 ⊆ 𝐵 ∧ 𝐴 ≠ 𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 395 ∈ wcel 2108 ≠ wne 2942 ⊆ wss 3883 Ord word 6250 Oncon0 6251 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-11 2156 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pr 5347 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-sb 2069 df-clab 2716 df-cleq 2730 df-clel 2817 df-ne 2943 df-ral 3068 df-rex 3069 df-rab 3072 df-v 3424 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-tr 5188 df-eprel 5486 df-po 5494 df-so 5495 df-fr 5535 df-we 5537 df-ord 6254 df-on 6255 |
This theorem is referenced by: tfindsg 7682 findsg 7720 oancom 9339 cardsdom2 9677 alephord 9762 scutbdaylt 33939 |
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