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| Mirrors > Home > MPE Home > Th. List > lesloe | Structured version Visualization version GIF version | ||
| Description: Surreal less-than or equal in terms of less-than. (Contributed by Scott Fenton, 8-Dec-2021.) |
| Ref | Expression |
|---|---|
| lesloe | ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 ≤s 𝐵 ↔ (𝐴 <s 𝐵 ∨ 𝐴 = 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | lenlts 27716 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 ≤s 𝐵 ↔ ¬ 𝐵 <s 𝐴)) | |
| 2 | orcom 871 | . . . 4 ⊢ ((𝐴 <s 𝐵 ∨ 𝐴 = 𝐵) ↔ (𝐴 = 𝐵 ∨ 𝐴 <s 𝐵)) | |
| 3 | eqcom 2743 | . . . . 5 ⊢ (𝐴 = 𝐵 ↔ 𝐵 = 𝐴) | |
| 4 | 3 | orbi1i 914 | . . . 4 ⊢ ((𝐴 = 𝐵 ∨ 𝐴 <s 𝐵) ↔ (𝐵 = 𝐴 ∨ 𝐴 <s 𝐵)) |
| 5 | 2, 4 | bitri 275 | . . 3 ⊢ ((𝐴 <s 𝐵 ∨ 𝐴 = 𝐵) ↔ (𝐵 = 𝐴 ∨ 𝐴 <s 𝐵)) |
| 6 | ltsso 27640 | . . . . . 6 ⊢ <s Or No | |
| 7 | sotric 5569 | . . . . . 6 ⊢ (( <s Or No ∧ (𝐵 ∈ No ∧ 𝐴 ∈ No )) → (𝐵 <s 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 <s 𝐵))) | |
| 8 | 6, 7 | mpan 691 | . . . . 5 ⊢ ((𝐵 ∈ No ∧ 𝐴 ∈ No ) → (𝐵 <s 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 <s 𝐵))) |
| 9 | 8 | ancoms 458 | . . . 4 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐵 <s 𝐴 ↔ ¬ (𝐵 = 𝐴 ∨ 𝐴 <s 𝐵))) |
| 10 | 9 | con2bid 354 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → ((𝐵 = 𝐴 ∨ 𝐴 <s 𝐵) ↔ ¬ 𝐵 <s 𝐴)) |
| 11 | 5, 10 | bitrid 283 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → ((𝐴 <s 𝐵 ∨ 𝐴 = 𝐵) ↔ ¬ 𝐵 <s 𝐴)) |
| 12 | 1, 11 | bitr4d 282 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 ≤s 𝐵 ↔ (𝐴 <s 𝐵 ∨ 𝐴 = 𝐵))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∨ wo 848 = wceq 1542 ∈ wcel 2114 class class class wbr 5085 Or wor 5538 No csur 27603 <s clts 27604 ≤s cles 27708 |
| 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 2185 ax-ext 2708 ax-sep 5231 ax-nul 5241 ax-pr 5375 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-ord 6326 df-on 6327 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-fv 6506 df-1o 8405 df-2o 8406 df-no 27606 df-lts 27607 df-les 27709 |
| This theorem is referenced by: lesloed 27722 ltlesnd 27739 leslss 27901 lemulsd 28130 mulsge0d 28138 lemuls1ad 28174 abssnid 28235 om2noseqlt2 28292 elnns2 28333 eucliddivs 28368 bdaypw2n0bndlem 28455 bdayfinbndlem1 28459 |
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