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| Mirrors > Home > MPE Home > Th. List > lesubsubsbd | Structured version Visualization version GIF version | ||
| Description: Equivalence for the surreal less-than or equal relationship between differences. (Contributed by Scott Fenton, 7-Mar-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 |
|---|---|
| lesubsubsbd | ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ (𝐴 -s 𝐵) ≤s (𝐶 -s 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ltsubsubsbd.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 2 | ltsubsubsbd.1 | . . . 4 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 3 | ltsubsubsbd.4 | . . . 4 ⊢ (𝜑 → 𝐷 ∈ No ) | |
| 4 | ltsubsubsbd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 5 | 1, 2, 3, 4 | ltsubsubs3bd 28258 | . . 3 ⊢ (𝜑 → ((𝐵 -s 𝐷) <s (𝐴 -s 𝐶) ↔ (𝐶 -s 𝐷) <s (𝐴 -s 𝐵))) |
| 6 | 5 | notbid 321 | . 2 ⊢ (𝜑 → (¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶) ↔ ¬ (𝐶 -s 𝐷) <s (𝐴 -s 𝐵))) |
| 7 | 2, 4 | subscld 28236 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) ∈ No ) |
| 8 | 1, 3 | subscld 28236 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐷) ∈ No ) |
| 9 | lenlts 27896 | . . 3 ⊢ (((𝐴 -s 𝐶) ∈ No ∧ (𝐵 -s 𝐷) ∈ No ) → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ ¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶))) | |
| 10 | 7, 8, 9 | syl2anc 595 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ ¬ (𝐵 -s 𝐷) <s (𝐴 -s 𝐶))) |
| 11 | 2, 1 | subscld 28236 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐵) ∈ No ) |
| 12 | 4, 3 | subscld 28236 | . . 3 ⊢ (𝜑 → (𝐶 -s 𝐷) ∈ No ) |
| 13 | lenlts 27896 | . . 3 ⊢ (((𝐴 -s 𝐵) ∈ No ∧ (𝐶 -s 𝐷) ∈ No ) → ((𝐴 -s 𝐵) ≤s (𝐶 -s 𝐷) ↔ ¬ (𝐶 -s 𝐷) <s (𝐴 -s 𝐵))) | |
| 14 | 11, 12, 13 | syl2anc 595 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐵) ≤s (𝐶 -s 𝐷) ↔ ¬ (𝐶 -s 𝐷) <s (𝐴 -s 𝐵))) |
| 15 | 6, 10, 14 | 3bitr4d 314 | 1 ⊢ (𝜑 → ((𝐴 -s 𝐶) ≤s (𝐵 -s 𝐷) ↔ (𝐴 -s 𝐵) ≤s (𝐶 -s 𝐷))) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∈ wcel 2150 class class class wbr 5114 (class class class)co 7414 No csur 27784 <s clts 27785 ≤s cles 27888 -s csubs 28193 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1823 ax-4 1837 ax-5 1938 ax-6 1995 ax-7 2036 ax-8 2152 ax-9 2160 ax-10 2183 ax-11 2199 ax-12 2220 ax-ext 2742 ax-rep 5243 ax-sep 5262 ax-nul 5274 ax-pow 5340 ax-pr 5408 ax-un 7736 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1571 df-fal 1581 df-ex 1808 df-nf 1812 df-sb 2099 df-mo 2574 df-eu 2604 df-clab 2749 df-cleq 2762 df-clel 2845 df-nfc 2919 df-ne 2966 df-ral 3087 df-rex 3097 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3464 df-sbc 3753 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-ot 4603 df-uni 4878 df-int 4918 df-iun 4963 df-br 5115 df-opab 5179 df-mpt 5198 df-tr 5224 df-id 5560 df-eprel 5565 df-po 5573 df-so 5574 df-fr 5618 df-se 5619 df-we 5620 df-xp 5671 df-rel 5672 df-cnv 5673 df-co 5674 df-dm 5675 df-rn 5676 df-res 5677 df-ima 5678 df-pred 6306 df-ord 6367 df-on 6368 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-1st 7989 df-2nd 7990 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-1o 8456 df-2o 8457 df-nadd 8655 df-no 27787 df-lts 27788 df-bday 27789 df-les 27889 df-slts 27931 df-cuts 27933 df-0s 27980 df-made 28000 df-old 28001 df-left 28003 df-right 28004 df-norec 28111 df-norec2 28122 df-adds 28133 df-negs 28194 df-subs 28195 |
| This theorem is referenced by: mulsuniflem 28322 |
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