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| Mirrors > Home > MPE Home > Th. List > addscomd | Structured version Visualization version GIF version | ||
| Description: Surreal addition is commutative. Part of Theorem 3 of [Conway] p. 17. (Contributed by Scott Fenton, 20-Aug-2024.) |
| Ref | Expression |
|---|---|
| addscomd.1 | ⊢ (𝜑 → 𝐴 ∈ No) |
| addscomd.2 | ⊢ (𝜑 → 𝐵 ∈ No) |
| Ref | Expression |
|---|---|
| addscomd | ⊢ (𝜑 → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addscomd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ No) | |
| 2 | addscomd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ No) | |
| 3 | addscom 28385 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) | |
| 4 | 1, 2, 3 | syl2anc 596 | 1 ⊢ (𝜑 → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2147 (class class class)co 7446 Nocsur 28030 +s cadds 28378 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5236 ax-sep 5253 ax-nul 5264 ax-pow 5332 ax-pr 5396 ax-un 7778 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5551 df-eprel 5556 df-po 5564 df-so 5565 df-fr 5609 df-se 5610 df-we 5611 df-xp 5662 df-rel 5663 df-cnv 5664 df-co 5665 df-dm 5666 df-rn 5667 df-res 5668 df-ima 5669 df-pred 6325 df-ord 6386 df-on 6387 df-suc 6389 df-iota 6515 df-fun 6563 df-fn 6564 df-f 6565 df-f1 6566 df-fo 6567 df-f1o 6568 df-fv 6569 df-riota 7403 df-ov 7449 df-oprab 7450 df-mpo 7451 df-1st 8028 df-2nd 8029 df-frecs 8330 df-wrecs 8361 df-recs 8410 df-1o 8507 df-2o 8508 df-no 28033 df-lts 28034 df-bday 28035 df-slts 28177 df-cuts 28179 df-made 28246 df-old 28247 df-left 28249 df-right 28250 df-norec2 28368 df-adds 28379 |
| This theorem is used by: addslid 28387 addsproplem2 28389 addsproplem4 28391 addsproplem5 28392 addsproplem6 28393 adds32d 28426 adds12d 28427 adds42d 28429 addbday 28437 negnegs 28463 npcans 28494 negsubsdi2d 28499 ltsubsubsbd 28502 ltsubadds2d 28509 ltaddsubs2d 28511 lesubsd 28515 mulsproplem12 28546 mulscom 28558 addsdilem3 28572 addsdilem4 28573 mulsasslem3 28584 mulsunif2lem 28588 elzn0s 28817 zcuts 28826 zsoring 28828 halfcut 28877 pw2cut2 28881 bdayfinbndlem1 28886 z12addscl 28896 |
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