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| Mirrors > Home > MPE Home > Th. List > addsassd | Structured version Visualization version GIF version | ||
| Description: Surreal addition is associative. Part of theorem 3 of [Conway] p. 17. (Contributed by Scott Fenton, 22-Jan-2025.) |
| Ref | Expression |
|---|---|
| addsassd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| addsassd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| addsassd.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| Ref | Expression |
|---|---|
| addsassd | ⊢ (𝜑 → ((𝐴 +s 𝐵) +s 𝐶) = (𝐴 +s (𝐵 +s 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addsassd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | addsassd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | addsassd.3 | . 2 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 4 | addsass 28006 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ∧ 𝐶 ∈ No ) → ((𝐴 +s 𝐵) +s 𝐶) = (𝐴 +s (𝐵 +s 𝐶))) | |
| 5 | 1, 2, 3, 4 | syl3anc 1374 | 1 ⊢ (𝜑 → ((𝐴 +s 𝐵) +s 𝐶) = (𝐴 +s (𝐵 +s 𝐶))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1542 ∈ wcel 2114 (class class class)co 7361 No csur 27612 +s cadds 27960 |
| 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 2709 ax-rep 5225 ax-sep 5242 ax-nul 5252 ax-pow 5311 ax-pr 5378 ax-un 7683 |
| 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 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3062 df-rmo 3351 df-reu 3352 df-rab 3401 df-v 3443 df-sbc 3742 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4287 df-if 4481 df-pw 4557 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-ot 4590 df-uni 4865 df-int 4904 df-iun 4949 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-se 5579 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 df-pred 6260 df-ord 6321 df-on 6322 df-suc 6324 df-iota 6449 df-fun 6495 df-fn 6496 df-f 6497 df-f1 6498 df-fo 6499 df-f1o 6500 df-fv 6501 df-riota 7318 df-ov 7364 df-oprab 7365 df-mpo 7366 df-1st 7936 df-2nd 7937 df-frecs 8226 df-wrecs 8257 df-recs 8306 df-1o 8400 df-2o 8401 df-nadd 8597 df-no 27615 df-lts 27616 df-bday 27617 df-les 27718 df-slts 27759 df-cuts 27761 df-0s 27808 df-made 27828 df-old 27829 df-left 27831 df-right 27832 df-norec2 27950 df-adds 27961 |
| This theorem is referenced by: adds32d 28008 adds12d 28009 adds4d 28010 addsubsassd 28082 subsubs4d 28095 addsdilem3 28154 mulsasslem3 28166 n0addscl 28345 eucliddivs 28377 n0seo 28422 expadds 28436 addhalfcut 28460 pw2cutp1 28462 pw2cut2 28463 bdaypw2n0bndlem 28464 bdaypw2bnd 28466 bdayfinbndlem1 28468 readdscl 28500 |
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