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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 28100 | . . 3 ⊢ (𝜑 → ( -us ‘𝐶) ∈ No ) |
| 5 | 1, 2, 4 | adds32d 28070 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s ( -us ‘𝐶)) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 6 | 1, 2 | addscld 28043 | . . 3 ⊢ (𝜑 → (𝐴 +s 𝐵) ∈ No ) |
| 7 | 6, 3 | subsvald 28124 | . 2 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 +s 𝐵) +s ( -us ‘𝐶))) |
| 8 | 1, 3 | subsvald 28124 | . . 3 ⊢ (𝜑 → (𝐴 -s 𝐶) = (𝐴 +s ( -us ‘𝐶))) |
| 9 | 8 | oveq1d 7400 | . 2 ⊢ (𝜑 → ((𝐴 -s 𝐶) +s 𝐵) = ((𝐴 +s ( -us ‘𝐶)) +s 𝐵)) |
| 10 | 5, 7, 9 | 3eqtr4d 2801 | 1 ⊢ (𝜑 → ((𝐴 +s 𝐵) -s 𝐶) = ((𝐴 -s 𝐶) +s 𝐵)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1554 ∈ wcel 2136 ‘cfv 6510 (class class class)co 7385 No csur 27674 +s cadds 28022 -us cnegs 28082 -s csubs 28083 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1809 ax-4 1823 ax-5 1924 ax-6 1981 ax-7 2022 ax-8 2138 ax-9 2146 ax-10 2169 ax-11 2185 ax-12 2206 ax-ext 2728 ax-rep 5221 ax-sep 5240 ax-nul 5250 ax-pow 5316 ax-pr 5384 ax-un 7707 |
| This theorem depends on definitions: df-bi 209 df-an 399 df-or 857 df-3or 1096 df-3an 1097 df-tru 1557 df-fal 1567 df-ex 1794 df-nf 1798 df-sb 2085 df-mo 2560 df-eu 2590 df-clab 2735 df-cleq 2748 df-clel 2831 df-nfc 2905 df-ne 2952 df-ral 3071 df-rex 3081 df-rmo 3361 df-reu 3362 df-rab 3409 df-v 3450 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4281 df-if 4475 df-pw 4551 df-sn 4577 df-pr 4579 df-tp 4581 df-op 4583 df-ot 4585 df-uni 4860 df-int 4900 df-iun 4945 df-br 5095 df-opab 5157 df-mpt 5176 df-tr 5202 df-id 5535 df-eprel 5540 df-po 5548 df-so 5549 df-fr 5593 df-se 5594 df-we 5595 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-pred 6277 df-ord 6338 df-on 6339 df-suc 6341 df-iota 6466 df-fun 6512 df-fn 6513 df-f 6514 df-f1 6515 df-fo 6516 df-f1o 6517 df-fv 6518 df-riota 7342 df-ov 7388 df-oprab 7389 df-mpo 7390 df-1st 7959 df-2nd 7960 df-frecs 8250 df-wrecs 8281 df-recs 8330 df-1o 8425 df-2o 8426 df-nadd 8624 df-no 27677 df-lts 27678 df-bday 27679 df-les 27779 df-slts 27821 df-cuts 27823 df-0s 27870 df-made 27890 df-old 27891 df-left 27893 df-right 27894 df-norec 28001 df-norec2 28012 df-adds 28023 df-negs 28084 df-subs 28085 |
| This theorem is referenced by: addsubs4d 28164 mulsproplem5 28183 mulsproplem6 28184 mulsproplem7 28185 mulsproplem8 28186 sltmuls1 28210 sltmuls2 28211 mulsuniflem 28212 addsdilem3 28216 addsdilem4 28217 mulsasslem3 28228 mulsunif2lem 28232 zseo 28485 pw2cut2 28525 bdayfinbndlem1 28530 readdscl 28562 |
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