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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 28145 | . . . . 5 ⊢ ((𝐴 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 -s 𝐶) +s 𝐶) = 𝐴) | |
| 4 | 1, 2, 3 | syl2anc 593 | . . . 4 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐶) = 𝐴) |
| 5 | ltsubsubsbd.2 | . . . . 5 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 6 | npcans 28145 | . . . . 5 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → ((𝐴 -s 𝐵) +s 𝐵) = 𝐴) | |
| 7 | 1, 5, 6 | syl2anc 593 | . . . 4 ⊢ (𝜑 → ((𝐴 -s 𝐵) +s 𝐵) = 𝐴) |
| 8 | 4, 7 | eqtr4d 2799 | . . 3 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐶) = ((𝐴 -s 𝐵) +s 𝐵)) |
| 9 | 5, 2 | addscomd 28037 | . . . . 5 ⊢ (𝜑 → (𝐵 +s 𝐶) = (𝐶 +s 𝐵)) |
| 10 | 9 | oveq1d 7407 | . . . 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 28131 | . . . . . 6 ⊢ (𝜑 → (𝐵 -s 𝐷) = (𝐵 +s ( -us ‘𝐷))) |
| 13 | 12 | oveq1d 7407 | . . . . 5 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐵 +s ( -us ‘𝐷)) +s 𝐶)) |
| 14 | 11 | negscld 28107 | . . . . . 6 ⊢ (𝜑 → ( -us ‘𝐷) ∈ No ) |
| 15 | 5, 14, 2 | adds32d 28077 | . . . . 5 ⊢ (𝜑 → ((𝐵 +s ( -us ‘𝐷)) +s 𝐶) = ((𝐵 +s 𝐶) +s ( -us ‘𝐷))) |
| 16 | 13, 15 | eqtrd 2796 | . . . 4 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐵 +s 𝐶) +s ( -us ‘𝐷))) |
| 17 | 2, 11 | subsvald 28131 | . . . . . 6 ⊢ (𝜑 → (𝐶 -s 𝐷) = (𝐶 +s ( -us ‘𝐷))) |
| 18 | 17 | oveq1d 7407 | . . . . 5 ⊢ (𝜑 → ((𝐶 -s 𝐷) +s 𝐵) = ((𝐶 +s ( -us ‘𝐷)) +s 𝐵)) |
| 19 | 2, 14, 5 | adds32d 28077 | . . . . 5 ⊢ (𝜑 → ((𝐶 +s ( -us ‘𝐷)) +s 𝐵) = ((𝐶 +s 𝐵) +s ( -us ‘𝐷))) |
| 20 | 18, 19 | eqtrd 2796 | . . . 4 ⊢ (𝜑 → ((𝐶 -s 𝐷) +s 𝐵) = ((𝐶 +s 𝐵) +s ( -us ‘𝐷))) |
| 21 | 10, 16, 20 | 3eqtr4d 2806 | . . 3 ⊢ (𝜑 → ((𝐵 -s 𝐷) +s 𝐶) = ((𝐶 -s 𝐷) +s 𝐵)) |
| 22 | 8, 21 | breq12d 5112 | . 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 28133 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) ∈ No ) |
| 24 | 5, 11 | subscld 28133 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐷) ∈ No ) |
| 25 | 23, 24, 2 | ltadds1d 28068 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) <s (𝐵 -s 𝐷) ↔ ((𝐴 -s 𝐶) +s 𝐶) <s ((𝐵 -s 𝐷) +s 𝐶))) |
| 26 | 1, 5 | subscld 28133 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐵) ∈ No ) |
| 27 | 2, 11 | subscld 28133 | . . 3 ⊢ (𝜑 → (𝐶 -s 𝐷) ∈ No ) |
| 28 | 26, 27, 5 | ltadds1d 28068 | . 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 313 | 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 208 = wceq 1559 ∈ wcel 2141 class class class wbr 5099 ‘cfv 6517 (class class class)co 7392 No csur 27681 <s clts 27682 +s cadds 28029 -us cnegs 28089 -s csubs 28090 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-ot 4590 df-uni 4865 df-int 4905 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-se 5599 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-1st 7966 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-1o 8432 df-2o 8433 df-nadd 8631 df-no 27684 df-lts 27685 df-bday 27686 df-les 27786 df-slts 27828 df-cuts 27830 df-0s 27877 df-made 27897 df-old 27898 df-left 27900 df-right 27901 df-norec 28008 df-norec2 28019 df-adds 28030 df-negs 28091 df-subs 28092 |
| This theorem is referenced by: ltsubsubs3bd 28155 lesubsubs3bd 28158 mulsproplem6 28191 mulsproplem7 28192 mulsproplem8 28193 |
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