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| Mirrors > Home > MPE Home > Th. List > ltsubsubsbd | Structured version Visualization version GIF version | ||
| Description: Equivalence for the surreal less-than relationship between differences. (Contributed by Scott Fenton, 6-Feb-2025.) |
| Ref | Expression |
|---|---|
| ltsubsubsbd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| ltsubsubsbd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| ltsubsubsbd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| ltsubsubsbd.4 | ⊢ (𝜑 → 𝐷 ∈ No ) |
| Ref | Expression |
|---|---|
| ltsubsubsbd | ⊢ (𝜑 → ((𝐴 -s 𝐶) <s (𝐵 -s 𝐷) ↔ (𝐴 -s 𝐵) <s (𝐶 -s 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltsubsubsbd.1 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | ltsubsubsbd.3 | . . . . 5 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 3 | npcans 28083 | . . . . 5 ⊢ ((𝐴 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 -s 𝐶) +s 𝐶) = 𝐴) | |
| 4 | 1, 2, 3 | syl2anc 585 | . . . 4 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐶) = 𝐴) |
| 5 | ltsubsubsbd.2 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 6 | npcans 28083 | . . . . 5 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → ((𝐴 -s 𝐵) +s 𝐵) = 𝐴) | |
| 7 | 1, 5, 6 | syl2anc 585 | . . . 4 ⊢ (𝜑 → ((𝐴 -s 𝐵) +s 𝐵) = 𝐴) |
| 8 | 4, 7 | eqtr4d 2775 | . . 3 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐶) = ((𝐴 -s 𝐵) +s 𝐵)) |
| 9 | 5, 2 | addscomd 27975 | . . . . 5 ⊢ (𝜑 → (𝐵 +s 𝐶) = (𝐶 +s 𝐵)) |
| 10 | 9 | oveq1d 7383 | . . . 4 ⊢ (𝜑 → ((𝐵 +s 𝐶) +s ( -us ‘𝐷)) = ((𝐶 +s 𝐵) +s ( -us ‘𝐷))) |
| 11 | ltsubsubsbd.4 | . . . . . . 7 ⊢ (𝜑 → 𝐷 ∈ No ) | |
| 12 | 5, 11 | subsvald 28069 | . . . . . 6 ⊢ (𝜑 → (𝐵 -s 𝐷) = (𝐵 +s ( -us ‘𝐷))) |
| 13 | 12 | oveq1d 7383 | . . . . 5 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐵 +s ( -us ‘𝐷)) +s 𝐶)) |
| 14 | 11 | negscld 28045 | . . . . . 6 ⊢ (𝜑 → ( -us ‘𝐷) ∈ No ) |
| 15 | 5, 14, 2 | adds32d 28015 | . . . . 5 ⊢ (𝜑 → ((𝐵 +s ( -us ‘𝐷)) +s 𝐶) = ((𝐵 +s 𝐶) +s ( -us ‘𝐷))) |
| 16 | 13, 15 | eqtrd 2772 | . . . 4 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐵 +s 𝐶) +s ( -us ‘𝐷))) |
| 17 | 2, 11 | subsvald 28069 | . . . . . 6 ⊢ (𝜑 → (𝐶 -s 𝐷) = (𝐶 +s ( -us ‘𝐷))) |
| 18 | 17 | oveq1d 7383 | . . . . 5 ⊢ (𝜑 → ((𝐶 -s 𝐷) +s 𝐵) = ((𝐶 +s ( -us ‘𝐷)) +s 𝐵)) |
| 19 | 2, 14, 5 | adds32d 28015 | . . . . 5 ⊢ (𝜑 → ((𝐶 +s ( -us ‘𝐷)) +s 𝐵) = ((𝐶 +s 𝐵) +s ( -us ‘𝐷))) |
| 20 | 18, 19 | eqtrd 2772 | . . . 4 ⊢ (𝜑 → ((𝐶 -s 𝐷) +s 𝐵) = ((𝐶 +s 𝐵) +s ( -us ‘𝐷))) |
| 21 | 10, 16, 20 | 3eqtr4d 2782 | . . 3 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐶 -s 𝐷) +s 𝐵)) |
| 22 | 8, 21 | breq12d 5113 | . 2 ⊢ (𝜑 → (((𝐴 -s 𝐶) +s 𝐶) <s ((𝐵 -s 𝐷) +s 𝐶) ↔ ((𝐴 -s 𝐵) +s 𝐵) <s ((𝐶 -s 𝐷) +s 𝐵))) |
| 23 | 1, 2 | subscld 28071 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) ∈ No ) |
| 24 | 5, 11 | subscld 28071 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐷) ∈ No ) |
| 25 | 23, 24, 2 | ltadds1d 28006 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) <s (𝐵 -s 𝐷) ↔ ((𝐴 -s 𝐶) +s 𝐶) <s ((𝐵 -s 𝐷) +s 𝐶))) |
| 26 | 1, 5 | subscld 28071 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐵) ∈ No ) |
| 27 | 2, 11 | subscld 28071 | . . 3 ⊢ (𝜑 → (𝐶 -s 𝐷) ∈ No ) |
| 28 | 26, 27, 5 | ltadds1d 28006 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐵) <s (𝐶 -s 𝐷) ↔ ((𝐴 -s 𝐵) +s 𝐵) <s ((𝐶 -s 𝐷) +s 𝐵))) |
| 29 | 22, 25, 28 | 3bitr4d 311 | 1 ⊢ (𝜑 → ((𝐴 -s 𝐶) <s (𝐵 -s 𝐷) ↔ (𝐴 -s 𝐵) <s (𝐶 -s 𝐷))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 = wceq 1542 ∈ wcel 2114 class class class wbr 5100 ‘cfv 6500 (class class class)co 7368 No csur 27619 <s clts 27620 +s cadds 27967 -us cnegs 28027 -s csubs 28028 |
| 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-rep 5226 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 |
| 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-rmo 3352 df-reu 3353 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-ot 4591 df-uni 4866 df-int 4905 df-iun 4950 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-se 5586 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-pred 6267 df-ord 6328 df-on 6329 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-1st 7943 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-1o 8407 df-2o 8408 df-nadd 8604 df-no 27622 df-lts 27623 df-bday 27624 df-les 27725 df-slts 27766 df-cuts 27768 df-0s 27815 df-made 27835 df-old 27836 df-left 27838 df-right 27839 df-norec 27946 df-norec2 27957 df-adds 27968 df-negs 28029 df-subs 28030 |
| This theorem is referenced by: ltsubsubs3bd 28093 lesubsubs3bd 28096 mulsproplem6 28129 mulsproplem7 28130 mulsproplem8 28131 |
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