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| Mirrors > Home > MPE Home > Th. List > posdifsd | Structured version Visualization version GIF version | ||
| Description: Comparison of two surreals whose difference is positive. (Contributed by Scott Fenton, 10-Mar-2025.) |
| Ref | Expression |
|---|---|
| posdifsd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| posdifsd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| Ref | Expression |
|---|---|
| posdifsd | ⊢ (𝜑 → (𝐴 <s 𝐵 ↔ 0s <s (𝐵 -s 𝐴))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 0sno 27773 | . . . 4 ⊢ 0s ∈ No | |
| 2 | 1 | a1i 11 | . . 3 ⊢ (𝜑 → 0s ∈ No ) |
| 3 | posdifsd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 4 | posdifsd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 5 | 3, 4 | subscld 28006 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐴) ∈ No ) |
| 6 | 2, 5, 4 | sltadd1d 27944 | . 2 ⊢ (𝜑 → ( 0s <s (𝐵 -s 𝐴) ↔ ( 0s +s 𝐴) <s ((𝐵 -s 𝐴) +s 𝐴))) |
| 7 | addslid 27914 | . . . 4 ⊢ (𝐴 ∈ No → ( 0s +s 𝐴) = 𝐴) | |
| 8 | 4, 7 | syl 17 | . . 3 ⊢ (𝜑 → ( 0s +s 𝐴) = 𝐴) |
| 9 | npcans 28018 | . . . 4 ⊢ ((𝐵 ∈ No ∧ 𝐴 ∈ No ) → ((𝐵 -s 𝐴) +s 𝐴) = 𝐵) | |
| 10 | 3, 4, 9 | syl2anc 584 | . . 3 ⊢ (𝜑 → ((𝐵 -s 𝐴) +s 𝐴) = 𝐵) |
| 11 | 8, 10 | breq12d 5108 | . 2 ⊢ (𝜑 → (( 0s +s 𝐴) <s ((𝐵 -s 𝐴) +s 𝐴) ↔ 𝐴 <s 𝐵)) |
| 12 | 6, 11 | bitr2d 280 | 1 ⊢ (𝜑 → (𝐴 <s 𝐵 ↔ 0s <s (𝐵 -s 𝐴))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1541 ∈ wcel 2113 class class class wbr 5095 (class class class)co 7354 No csur 27581 <s cslt 27582 0s c0s 27769 +s cadds 27905 -s csubs 27965 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7676 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-tp 4582 df-op 4584 df-ot 4586 df-uni 4861 df-int 4900 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-se 5575 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6255 df-ord 6316 df-on 6317 df-suc 6319 df-iota 6444 df-fun 6490 df-fn 6491 df-f 6492 df-f1 6493 df-fo 6494 df-f1o 6495 df-fv 6496 df-riota 7311 df-ov 7357 df-oprab 7358 df-mpo 7359 df-1st 7929 df-2nd 7930 df-frecs 8219 df-wrecs 8250 df-recs 8299 df-1o 8393 df-2o 8394 df-nadd 8589 df-no 27584 df-slt 27585 df-bday 27586 df-sle 27687 df-sslt 27724 df-scut 27726 df-0s 27771 df-made 27791 df-old 27792 df-left 27794 df-right 27795 df-norec 27884 df-norec2 27895 df-adds 27906 df-negs 27966 df-subs 27967 |
| This theorem is referenced by: sltmul2 28113 precsexlem9 28156 |
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