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| Mirrors > Home > MPE Home > Th. List > ltsrecd | Structured version Visualization version GIF version | ||
| Description: A comparison law for surreals considered as cuts of sets of surreals. (Contributed by Scott Fenton, 5-Dec-2025.) |
| Ref | Expression |
|---|---|
| ltsrecd.1 | ⊢ (𝜑 → 𝐴 <<s 𝐵) |
| ltsrecd.2 | ⊢ (𝜑 → 𝐶 <<s 𝐷) |
| ltsrecd.3 | ⊢ (𝜑 → 𝑋 = (𝐴 |s 𝐵)) |
| ltsrecd.4 | ⊢ (𝜑 → 𝑌 = (𝐶 |s 𝐷)) |
| Ref | Expression |
|---|---|
| ltsrecd | ⊢ (𝜑 → (𝑋 <s 𝑌 ↔ (∃𝑐 ∈ 𝐶 𝑋 ≤s 𝑐 ∨ ∃𝑏 ∈ 𝐵 𝑏 ≤s 𝑌))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltsrecd.1 | . 2 ⊢ (𝜑 → 𝐴 <<s 𝐵) | |
| 2 | ltsrecd.2 | . 2 ⊢ (𝜑 → 𝐶 <<s 𝐷) | |
| 3 | ltsrecd.3 | . 2 ⊢ (𝜑 → 𝑋 = (𝐴 |s 𝐵)) | |
| 4 | ltsrecd.4 | . 2 ⊢ (𝜑 → 𝑌 = (𝐶 |s 𝐷)) | |
| 5 | ltsrec 28192 | . 2 ⊢ (((𝐴 <<s 𝐵 ∧ 𝐶 <<s 𝐷) ∧ (𝑋 = (𝐴 |s 𝐵) ∧ 𝑌 = (𝐶 |s 𝐷))) → (𝑋 <s 𝑌 ↔ (∃𝑐 ∈ 𝐶 𝑋 ≤s 𝑐 ∨ ∃𝑏 ∈ 𝐵 𝑏 ≤s 𝑌))) | |
| 6 | 1, 2, 3, 4, 5 | syl22anc 852 | 1 ⊢ (𝜑 → (𝑋 <s 𝑌 ↔ (∃𝑐 ∈ 𝐶 𝑋 ≤s 𝑐 ∨ ∃𝑏 ∈ 𝐵 𝑏 ≤s 𝑌))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∨ wo 861 = wceq 1569 ∃wrex 3086 class class class wbr 5102 (class class class)co 7420 <s clts 28003 ≤s cles 28106 <<s cslts 28148 |s ccuts 28150 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-int 4907 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-ord 6365 df-on 6366 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-1o 8479 df-2o 8480 df-no 28005 df-lts 28006 df-bday 28007 df-les 28107 df-slts 28149 df-cuts 28151 |
| This theorem is used by: ltsn0 28297 leadds1 28380 oncutlt 28655 n0fincut 28746 halfcut 28849 |
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