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| Mirrors > Home > MPE Home > Th. List > ltlesd | Structured version Visualization version GIF version | ||
| Description: Surreal less-than implies less-than or equal. (Contributed by Scott Fenton, 16-Feb-2025.) |
| Ref | Expression |
|---|---|
| ltlesd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| ltlesd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| ltlesd.3 | ⊢ (𝜑 → 𝐴 <s 𝐵) |
| Ref | Expression |
|---|---|
| ltlesd | ⊢ (𝜑 → 𝐴 ≤s 𝐵) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltlesd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | ltlesd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | 1, 2 | jca 511 | . . 3 ⊢ (𝜑 → (𝐴 ∈ No ∧ 𝐵 ∈ No )) |
| 4 | ltlesd.3 | . . 3 ⊢ (𝜑 → 𝐴 <s 𝐵) | |
| 5 | ltsasym 27728 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 <s 𝐵 → ¬ 𝐵 <s 𝐴)) | |
| 6 | 3, 4, 5 | sylc 65 | . 2 ⊢ (𝜑 → ¬ 𝐵 <s 𝐴) |
| 7 | lenlts 27732 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 ≤s 𝐵 ↔ ¬ 𝐵 <s 𝐴)) | |
| 8 | 1, 2, 7 | syl2anc 585 | . 2 ⊢ (𝜑 → (𝐴 ≤s 𝐵 ↔ ¬ 𝐵 <s 𝐴)) |
| 9 | 6, 8 | mpbird 257 | 1 ⊢ (𝜑 → 𝐴 ≤s 𝐵) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 class class class wbr 5100 No csur 27619 <s clts 27620 ≤s cles 27724 |
| 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 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-tp 4587 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-ord 6328 df-on 6329 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-fv 6508 df-1o 8407 df-2o 8408 df-no 27622 df-lts 27623 df-les 27725 |
| This theorem is referenced by: ltlesnd 27755 lemulsd 28146 mulsge0d 28154 mulsuniflem 28157 ltmuls12ad 28191 ltonold 28269 oncutlt 28272 onnolt 28274 n0sge0 28346 uzsind 28413 halfcut 28466 bdaypw2n0bndlem 28471 bdayfinbndlem1 28475 elreno2 28503 1reno 28505 |
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