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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 28239 | . 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 2145 (class class class)co 7417 No csur 27884 +s cadds 28232 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 |
| 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 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4594 df-uni 4871 df-int 4911 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-se 5613 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 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 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-1st 7990 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-1o 8459 df-2o 8460 df-no 27887 df-lts 27888 df-bday 27889 df-slts 28031 df-cuts 28033 df-made 28100 df-old 28101 df-left 28103 df-right 28104 df-norec2 28222 df-adds 28233 |
| This theorem is used by: addslid 28241 addsproplem2 28243 addsproplem4 28245 addsproplem5 28246 addsproplem6 28247 adds32d 28280 adds12d 28281 adds42d 28283 addbday 28291 negnegs 28317 npcans 28348 negsubsdi2d 28353 ltsubsubsbd 28356 ltsubadds2d 28363 ltaddsubs2d 28365 lesubsd 28369 mulsproplem12 28400 mulscom 28412 addsdilem3 28426 addsdilem4 28427 mulsasslem3 28438 mulsunif2lem 28442 elzn0s 28671 zcuts 28680 zsoring 28682 halfcut 28731 pw2cut2 28735 bdayfinbndlem1 28740 z12addscl 28750 |
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