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Mirrors > Home > MPE Home > Th. List > sltne | Structured version Visualization version GIF version |
Description: Surreal less-than implies not equal. (Contributed by Scott Fenton, 12-Mar-2025.) |
Ref | Expression |
---|---|
sltne | ⊢ ((𝐴 ∈ No ∧ 𝐴 <s 𝐵) → 𝐵 ≠ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | sltirr 27725 | . . . 4 ⊢ (𝐴 ∈ No → ¬ 𝐴 <s 𝐴) | |
2 | breq2 5153 | . . . . 5 ⊢ (𝐵 = 𝐴 → (𝐴 <s 𝐵 ↔ 𝐴 <s 𝐴)) | |
3 | 2 | notbid 317 | . . . 4 ⊢ (𝐵 = 𝐴 → (¬ 𝐴 <s 𝐵 ↔ ¬ 𝐴 <s 𝐴)) |
4 | 1, 3 | syl5ibrcom 246 | . . 3 ⊢ (𝐴 ∈ No → (𝐵 = 𝐴 → ¬ 𝐴 <s 𝐵)) |
5 | 4 | necon2ad 2944 | . 2 ⊢ (𝐴 ∈ No → (𝐴 <s 𝐵 → 𝐵 ≠ 𝐴)) |
6 | 5 | imp 405 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐴 <s 𝐵) → 𝐵 ≠ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 = wceq 1533 ∈ wcel 2098 ≠ wne 2929 class class class wbr 5149 No csur 27618 <s cslt 27619 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5300 ax-nul 5307 ax-pr 5429 |
This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2930 df-ral 3051 df-rex 3060 df-rab 3419 df-v 3463 df-sbc 3774 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3964 df-nul 4323 df-if 4531 df-pw 4606 df-sn 4631 df-pr 4633 df-tp 4635 df-op 4637 df-uni 4910 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5633 df-we 5635 df-xp 5684 df-rel 5685 df-cnv 5686 df-co 5687 df-dm 5688 df-rn 5689 df-res 5690 df-ima 5691 df-ord 6374 df-on 6375 df-suc 6377 df-iota 6501 df-fun 6551 df-fn 6552 df-f 6553 df-fv 6557 df-1o 8487 df-2o 8488 df-no 27621 df-slt 27622 |
This theorem is referenced by: sltlend 27750 sgt0ne0 27813 0elright 27883 |
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