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| Mirrors > Home > MPE Home > Th. List > ltsne | Structured version Visualization version GIF version | ||
| Description: Surreal less-than implies not equal. (Contributed by Scott Fenton, 12-Mar-2025.) |
| Ref | Expression |
|---|---|
| ltsne | ⊢ ((𝐴 ∈ No ∧ 𝐴 <s 𝐵) → 𝐵 ≠ 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltsirr 27910 | . . . 4 ⊢ (𝐴 ∈ No → ¬ 𝐴 <s 𝐴) | |
| 2 | breq2 5113 | . . . . 5 ⊢ (𝐵 = 𝐴 → (𝐴 <s 𝐵 ↔ 𝐴 <s 𝐴)) | |
| 3 | 2 | notbid 321 | . . . 4 ⊢ (𝐵 = 𝐴 → (¬ 𝐴 <s 𝐵 ↔ ¬ 𝐴 <s 𝐴)) |
| 4 | 1, 3 | syl5ibrcom 250 | . . 3 ⊢ (𝐴 ∈ No → (𝐵 = 𝐴 → ¬ 𝐴 <s 𝐵)) |
| 5 | 4 | necon2ad 2973 | . 2 ⊢ (𝐴 ∈ No → (𝐴 <s 𝐵 → 𝐵 ≠ 𝐴)) |
| 6 | 5 | imp 411 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐴 <s 𝐵) → 𝐵 ≠ 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∧ wa 400 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 class class class wbr 5109 No csur 27804 <s clts 27805 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5257 ax-nul 5269 ax-pr 5404 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-ord 6363 df-on 6364 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-fv 6544 df-1o 8449 df-2o 8450 df-no 27807 df-lts 27808 |
| This theorem is referenced by: ltlesnd 27939 gt0ne0s 28011 0elright 28105 |
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