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| Mirrors > Home > MPE Home > Th. List > ordtr2 | Structured version Visualization version GIF version | ||
| Description: Transitive law for ordinal classes. (Contributed by NM, 12-Dec-2004.) (Proof shortened by Andrew Salmon, 25-Jul-2011.) |
| Ref | Expression |
|---|---|
| ordtr2 | ⊢ ((Ord 𝐴 ∧ Ord 𝐶) → ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ordelord 6383 | . . . . . . . 8 ⊢ ((Ord 𝐶 ∧ 𝐵 ∈ 𝐶) → Ord 𝐵) | |
| 2 | 1 | ex 417 | . . . . . . 7 ⊢ (Ord 𝐶 → (𝐵 ∈ 𝐶 → Ord 𝐵)) |
| 3 | 2 | ancld 559 | . . . . . 6 ⊢ (Ord 𝐶 → (𝐵 ∈ 𝐶 → (𝐵 ∈ 𝐶 ∧ Ord 𝐵))) |
| 4 | 3 | anc2li 564 | . . . . 5 ⊢ (Ord 𝐶 → (𝐵 ∈ 𝐶 → (Ord 𝐶 ∧ (𝐵 ∈ 𝐶 ∧ Ord 𝐵)))) |
| 5 | ordelpss 6389 | . . . . . . . . . 10 ⊢ ((Ord 𝐵 ∧ Ord 𝐶) → (𝐵 ∈ 𝐶 ↔ 𝐵 ⊊ 𝐶)) | |
| 6 | sspsstr 4071 | . . . . . . . . . . 11 ⊢ ((𝐴 ⊆ 𝐵 ∧ 𝐵 ⊊ 𝐶) → 𝐴 ⊊ 𝐶) | |
| 7 | 6 | expcom 418 | . . . . . . . . . 10 ⊢ (𝐵 ⊊ 𝐶 → (𝐴 ⊆ 𝐵 → 𝐴 ⊊ 𝐶)) |
| 8 | 5, 7 | biimtrdi 256 | . . . . . . . . 9 ⊢ ((Ord 𝐵 ∧ Ord 𝐶) → (𝐵 ∈ 𝐶 → (𝐴 ⊆ 𝐵 → 𝐴 ⊊ 𝐶))) |
| 9 | 8 | expcom 418 | . . . . . . . 8 ⊢ (Ord 𝐶 → (Ord 𝐵 → (𝐵 ∈ 𝐶 → (𝐴 ⊆ 𝐵 → 𝐴 ⊊ 𝐶)))) |
| 10 | 9 | com23 87 | . . . . . . 7 ⊢ (Ord 𝐶 → (𝐵 ∈ 𝐶 → (Ord 𝐵 → (𝐴 ⊆ 𝐵 → 𝐴 ⊊ 𝐶)))) |
| 11 | 10 | imp32 423 | . . . . . 6 ⊢ ((Ord 𝐶 ∧ (𝐵 ∈ 𝐶 ∧ Ord 𝐵)) → (𝐴 ⊆ 𝐵 → 𝐴 ⊊ 𝐶)) |
| 12 | 11 | com12 33 | . . . . 5 ⊢ (𝐴 ⊆ 𝐵 → ((Ord 𝐶 ∧ (𝐵 ∈ 𝐶 ∧ Ord 𝐵)) → 𝐴 ⊊ 𝐶)) |
| 13 | 4, 12 | syl9 78 | . . . 4 ⊢ (Ord 𝐶 → (𝐴 ⊆ 𝐵 → (𝐵 ∈ 𝐶 → 𝐴 ⊊ 𝐶))) |
| 14 | 13 | impd 415 | . . 3 ⊢ (Ord 𝐶 → ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ⊊ 𝐶)) |
| 15 | 14 | adantl 486 | . 2 ⊢ ((Ord 𝐴 ∧ Ord 𝐶) → ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ⊊ 𝐶)) |
| 16 | ordelpss 6389 | . 2 ⊢ ((Ord 𝐴 ∧ Ord 𝐶) → (𝐴 ∈ 𝐶 ↔ 𝐴 ⊊ 𝐶)) | |
| 17 | 15, 16 | sylibrd 262 | 1 ⊢ ((Ord 𝐴 ∧ Ord 𝐶) → ((𝐴 ⊆ 𝐵 ∧ 𝐵 ∈ 𝐶) → 𝐴 ∈ 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 ∈ wcel 2149 ⊆ wss 3913 ⊊ wpss 3914 Ord word 6360 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5261 ax-pr 5405 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4877 df-br 5114 df-opab 5178 df-tr 5223 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-ord 6364 |
| This theorem is referenced by: ontr2 6410 ordelinel 6465 smogt 8353 smocdmdom 8354 nnarcl 8601 nnawordex 8622 coftr 10256 noetasuplem4 27865 noetainflem4 27869 addonbday 28437 z12bdaylem 28642 hfuni 36574 |
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