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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 28188 | . . 3 ⊢ (𝜑 → ( -us ‘𝐶) ∈ No ) |
| 5 | 1, 2, 4 | adds32d 28158 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s ( -us ‘𝐶)) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 6 | 1, 2 | addscld 28131 | . . 3 ⊢ (𝜑 → (𝐴 +s 𝐵) ∈ No ) |
| 7 | 6, 3 | subsvald 28212 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 +s 𝐵) +s ( -us ‘𝐶))) |
| 8 | 1, 3 | subsvald 28212 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) = (𝐴 +s ( -us ‘𝐶))) |
| 9 | 8 | oveq1d 7415 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐵) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 10 | 5, 7, 9 | 3eqtr4d 2810 | 1 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 -s 𝐶) +s 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1563 ∈ wcel 2145 ‘cfv 6525 (class class class)co 7400 No csur 27762 +s cadds 28110 -us cnegs 28170 -s csubs 28171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2737 ax-rep 5232 ax-sep 5251 ax-nul 5261 ax-pow 5327 ax-pr 5395 ax-un 7722 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-nf 1807 df-sb 2094 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3080 df-rex 3090 df-rmo 3370 df-reu 3371 df-rab 3418 df-v 3459 df-sbc 3748 df-csb 3856 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-pss 3927 df-nul 4289 df-if 4484 df-pw 4560 df-sn 4586 df-pr 4588 df-tp 4590 df-op 4592 df-ot 4594 df-uni 4869 df-int 4909 df-iun 4954 df-br 5106 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5547 df-eprel 5552 df-po 5560 df-so 5561 df-fr 5605 df-se 5606 df-we 5607 df-xp 5658 df-rel 5659 df-cnv 5660 df-co 5661 df-dm 5662 df-rn 5663 df-res 5664 df-ima 5665 df-pred 6292 df-ord 6353 df-on 6354 df-suc 6356 df-iota 6481 df-fun 6527 df-fn 6528 df-f 6529 df-f1 6530 df-fo 6531 df-f1o 6532 df-fv 6533 df-riota 7357 df-ov 7403 df-oprab 7404 df-mpo 7405 df-1st 7974 df-2nd 7975 df-frecs 8266 df-wrecs 8297 df-recs 8346 df-1o 8441 df-2o 8442 df-nadd 8640 df-no 27765 df-lts 27766 df-bday 27767 df-les 27867 df-slts 27909 df-cuts 27911 df-0s 27958 df-made 27978 df-old 27979 df-left 27981 df-right 27982 df-norec 28089 df-norec2 28100 df-adds 28111 df-negs 28172 df-subs 28173 |
| This theorem is referenced by: addsubs4d 28252 mulsproplem5 28271 mulsproplem6 28272 mulsproplem7 28273 mulsproplem8 28274 sltmuls1 28298 sltmuls2 28299 mulsuniflem 28300 addsdilem3 28304 addsdilem4 28305 mulsasslem3 28316 mulsunif2lem 28320 zseo 28573 pw2cut2 28613 bdayfinbndlem1 28618 readdscl 28650 |
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