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| Mirrors > Home > MPE Home > Th. List > lestrd | Structured version Visualization version GIF version | ||
| Description: Surreal less-than or equal is transitive. (Contributed by Scott Fenton, 8-Dec-2021.) |
| Ref | Expression |
|---|---|
| ltstrd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| ltstrd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| ltstrd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| lestrd.4 | ⊢ (𝜑 → 𝐴 ≤s 𝐵) |
| lestrd.5 | ⊢ (𝜑 → 𝐵 ≤s 𝐶) |
| Ref | Expression |
|---|---|
| lestrd | ⊢ (𝜑 → 𝐴 ≤s 𝐶) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lestrd.4 | . 2 ⊢ (𝜑 → 𝐴 ≤s 𝐵) | |
| 2 | lestrd.5 | . 2 ⊢ (𝜑 → 𝐵 ≤s 𝐶) | |
| 3 | ltstrd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 4 | ltstrd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 5 | ltstrd.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 6 | lestr 27730 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 ≤s 𝐵 ∧ 𝐵 ≤s 𝐶) → 𝐴 ≤s 𝐶)) | |
| 7 | 3, 4, 5, 6 | syl3anc 1373 | . 2 ⊢ (𝜑 → ((𝐴 ≤s 𝐵 ∧ 𝐵 ≤s 𝐶) → 𝐴 ≤s 𝐶)) |
| 8 | 1, 2, 7 | mp2and 699 | 1 ⊢ (𝜑 → 𝐴 ≤s 𝐶) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 ∈ wcel 2113 class class class wbr 5098 No csur 27607 ≤s cles 27712 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-tp 4585 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-ord 6320 df-on 6321 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-fv 6500 df-1o 8397 df-2o 8398 df-no 27610 df-lts 27611 df-les 27713 |
| This theorem is referenced by: mulsuniflem 28145 leabss 28244 n0sge0 28334 bdaypw2n0bndlem 28459 bdayfinbndlem1 28463 |
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