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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 27781 | . 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 839 | 1 ⊢ (𝜑 → (𝑋 <s 𝑌 ↔ (∃𝑐 ∈ 𝐶 𝑋 ≤s 𝑐 ∨ ∃𝑏 ∈ 𝐵 𝑏 ≤s 𝑌))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∨ wo 848 = wceq 1542 ∃wrex 3059 class class class wbr 5074 (class class class)co 7356 <s clts 27592 ≤s cles 27696 <<s cslts 27737 |s ccuts 27739 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2184 ax-ext 2707 ax-rep 5201 ax-sep 5220 ax-nul 5230 ax-pow 5296 ax-pr 5364 ax-un 7678 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2538 df-eu 2568 df-clab 2714 df-cleq 2727 df-clel 2810 df-nfc 2884 df-ne 2931 df-ral 3050 df-rex 3060 df-rmo 3340 df-reu 3341 df-rab 3388 df-v 3429 df-sbc 3726 df-csb 3834 df-dif 3888 df-un 3890 df-in 3892 df-ss 3902 df-pss 3905 df-nul 4264 df-if 4457 df-pw 4533 df-sn 4558 df-pr 4560 df-tp 4562 df-op 4564 df-uni 4841 df-int 4880 df-br 5075 df-opab 5137 df-mpt 5156 df-tr 5182 df-id 5515 df-eprel 5520 df-po 5528 df-so 5529 df-fr 5573 df-we 5575 df-xp 5626 df-rel 5627 df-cnv 5628 df-co 5629 df-dm 5630 df-rn 5631 df-res 5632 df-ima 5633 df-ord 6315 df-on 6316 df-suc 6318 df-iota 6443 df-fun 6489 df-fn 6490 df-f 6491 df-f1 6492 df-fo 6493 df-f1o 6494 df-fv 6495 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-1o 8394 df-2o 8395 df-no 27594 df-lts 27595 df-bday 27596 df-les 27697 df-slts 27738 df-cuts 27740 |
| This theorem is referenced by: ltsn0 27886 leadds1 27969 oncutlt 28244 n0fincut 28335 halfcut 28438 |
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