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| Mirrors > Home > MPE Home > Th. List > addsubsd | Structured version Visualization version GIF version | ||
| Description: Law for surreal addition and subtraction. (Contributed by Scott Fenton, 4-Mar-2025.) |
| Ref | Expression |
|---|---|
| addsubsassd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| addsubsassd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| addsubsassd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| Ref | Expression |
|---|---|
| addsubsd | ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 -s 𝐶) +s 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addsubsassd.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | addsubsassd.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | addsubsassd.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 4 | 3 | negscld 28196 | . . 3 ⊢ (𝜑 → ( -us ‘𝐶) ∈ No ) |
| 5 | 1, 2, 4 | adds32d 28166 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s ( -us ‘𝐶)) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 6 | 1, 2 | addscld 28139 | . . 3 ⊢ (𝜑 → (𝐴 +s 𝐵) ∈ No ) |
| 7 | 6, 3 | subsvald 28220 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 +s 𝐵) +s ( -us ‘𝐶))) |
| 8 | 1, 3 | subsvald 28220 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) = (𝐴 +s ( -us ‘𝐶))) |
| 9 | 8 | oveq1d 7426 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐵) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 10 | 5, 7, 9 | 3eqtr4d 2814 | 1 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 -s 𝐶) +s 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1567 ∈ wcel 2149 ‘cfv 6537 (class class class)co 7411 No csur 27770 +s cadds 28118 -us cnegs 28178 -s csubs 28179 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 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 4877 df-int 4917 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-se 5616 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-1st 7986 df-2nd 7987 df-frecs 8278 df-wrecs 8309 df-recs 8358 df-1o 8453 df-2o 8454 df-nadd 8652 df-no 27773 df-lts 27774 df-bday 27775 df-les 27875 df-slts 27917 df-cuts 27919 df-0s 27966 df-made 27986 df-old 27987 df-left 27989 df-right 27990 df-norec 28097 df-norec2 28108 df-adds 28119 df-negs 28180 df-subs 28181 |
| This theorem is referenced by: addsubs4d 28260 mulsproplem5 28279 mulsproplem6 28280 mulsproplem7 28281 mulsproplem8 28282 sltmuls1 28306 sltmuls2 28307 mulsuniflem 28308 addsdilem3 28312 addsdilem4 28313 mulsasslem3 28324 mulsunif2lem 28328 zseo 28581 pw2cut2 28621 bdayfinbndlem1 28626 readdscl 28658 |
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