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| Mirrors > Home > MPE Home > Th. List > addscomd | Structured version Visualization version GIF version | ||
| Description: Surreal addition commutes. 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 27958 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) | |
| 4 | 1, 2, 3 | syl2anc 585 | 1 ⊢ (𝜑 → (𝐴 +s 𝐵) = (𝐵 +s 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 (class class class)co 7367 No csur 27603 +s cadds 27951 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-1o 8405 df-2o 8406 df-no 27606 df-lts 27607 df-bday 27608 df-slts 27750 df-cuts 27752 df-made 27819 df-old 27820 df-left 27822 df-right 27823 df-norec2 27941 df-adds 27952 |
| This theorem is referenced by: addslid 27960 addsproplem2 27962 addsproplem4 27964 addsproplem5 27965 addsproplem6 27966 adds32d 27999 adds12d 28000 adds42d 28002 addbday 28010 negnegs 28036 npcans 28067 negsubsdi2d 28072 ltsubsubsbd 28075 ltsubadds2d 28082 ltaddsubs2d 28084 lesubsd 28088 mulsproplem12 28119 mulscom 28131 addsdilem3 28145 addsdilem4 28146 mulsasslem3 28157 mulsunif2lem 28161 elzn0s 28390 zcuts 28399 zsoring 28401 halfcut 28450 pw2cut2 28454 bdayfinbndlem1 28459 z12addscl 28469 |
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