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| Mirrors > Home > MPE Home > Th. List > mulscomd | Structured version Visualization version GIF version | ||
| Description: Surreal multiplication commutes. Part of theorem 7 of [Conway] p. 19. (Contributed by Scott Fenton, 6-Mar-2025.) |
| Ref | Expression |
|---|---|
| mulscomd.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| mulscomd.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| Ref | Expression |
|---|---|
| mulscomd | ⊢ (𝜑 → (𝐴 ·s 𝐵) = (𝐵 ·s 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | mulscomd.1 | . 2 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | mulscomd.2 | . 2 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | mulscom 28065 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No ) → (𝐴 ·s 𝐵) = (𝐵 ·s 𝐴)) | |
| 4 | 1, 2, 3 | syl2anc 584 | 1 ⊢ (𝜑 → (𝐴 ·s 𝐵) = (𝐵 ·s 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 (class class class)co 7353 No csur 27567 ·s cmuls 28032 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7675 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-ral 3045 df-rex 3054 df-rmo 3345 df-reu 3346 df-rab 3397 df-v 3440 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4479 df-pw 4555 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-ot 4588 df-uni 4862 df-int 4900 df-iun 4946 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5518 df-eprel 5523 df-po 5531 df-so 5532 df-fr 5576 df-se 5577 df-we 5578 df-xp 5629 df-rel 5630 df-cnv 5631 df-co 5632 df-dm 5633 df-rn 5634 df-res 5635 df-ima 5636 df-pred 6253 df-ord 6314 df-on 6315 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7310 df-ov 7356 df-oprab 7357 df-mpo 7358 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-1o 8395 df-2o 8396 df-nadd 8591 df-no 27570 df-slt 27571 df-bday 27572 df-sle 27673 df-sslt 27710 df-scut 27712 df-0s 27756 df-made 27775 df-old 27776 df-left 27778 df-right 27779 df-norec 27868 df-norec2 27879 df-adds 27890 df-negs 27950 df-subs 27951 df-muls 28033 |
| This theorem is referenced by: addsdird 28083 subsdird 28085 mulnegs2d 28087 muls4d 28094 sltmul1d 28099 sltmulneg2d 28103 mulscan1d 28106 muls12d 28107 divscan1wd 28124 sltdivmul2wd 28126 sltmuldiv2wd 28128 |
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