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| Mirrors > Home > MPE Home > Th. List > muls4d | Structured version Visualization version GIF version | ||
| Description: Rearrangement of four surreal factors. (Contributed by Scott Fenton, 16-Apr-2025.) |
| Ref | Expression |
|---|---|
| muls4d.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| muls4d.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| muls4d.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| muls4d.4 | ⊢ (𝜑 → 𝐷 ∈ No ) |
| Ref | Expression |
|---|---|
| muls4d | ⊢ (𝜑 → ((𝐴 ·s 𝐵) ·s (𝐶 ·s 𝐷)) = ((𝐴 ·s 𝐶) ·s (𝐵 ·s 𝐷))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | muls4d.2 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 2 | muls4d.3 | . . . . . 6 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 3 | 1, 2 | mulscomd 28033 | . . . . 5 ⊢ (𝜑 → (𝐵 ·s 𝐶) = (𝐶 ·s 𝐵)) |
| 4 | 3 | oveq1d 7355 | . . . 4 ⊢ (𝜑 → ((𝐵 ·s 𝐶) ·s 𝐷) = ((𝐶 ·s 𝐵) ·s 𝐷)) |
| 5 | muls4d.4 | . . . . 5 ⊢ (𝜑 → 𝐷 ∈ No ) | |
| 6 | 1, 2, 5 | mulsassd 28060 | . . . 4 ⊢ (𝜑 → ((𝐵 ·s 𝐶) ·s 𝐷) = (𝐵 ·s (𝐶 ·s 𝐷))) |
| 7 | 2, 1, 5 | mulsassd 28060 | . . . 4 ⊢ (𝜑 → ((𝐶 ·s 𝐵) ·s 𝐷) = (𝐶 ·s (𝐵 ·s 𝐷))) |
| 8 | 4, 6, 7 | 3eqtr3d 2772 | . . 3 ⊢ (𝜑 → (𝐵 ·s (𝐶 ·s 𝐷)) = (𝐶 ·s (𝐵 ·s 𝐷))) |
| 9 | 8 | oveq2d 7356 | . 2 ⊢ (𝜑 → (𝐴 ·s (𝐵 ·s (𝐶 ·s 𝐷))) = (𝐴 ·s (𝐶 ·s (𝐵 ·s 𝐷)))) |
| 10 | muls4d.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 11 | 2, 5 | mulscld 28028 | . . 3 ⊢ (𝜑 → (𝐶 ·s 𝐷) ∈ No ) |
| 12 | 10, 1, 11 | mulsassd 28060 | . 2 ⊢ (𝜑 → ((𝐴 ·s 𝐵) ·s (𝐶 ·s 𝐷)) = (𝐴 ·s (𝐵 ·s (𝐶 ·s 𝐷)))) |
| 13 | 1, 5 | mulscld 28028 | . . 3 ⊢ (𝜑 → (𝐵 ·s 𝐷) ∈ No ) |
| 14 | 10, 2, 13 | mulsassd 28060 | . 2 ⊢ (𝜑 → ((𝐴 ·s 𝐶) ·s (𝐵 ·s 𝐷)) = (𝐴 ·s (𝐶 ·s (𝐵 ·s 𝐷)))) |
| 15 | 9, 12, 14 | 3eqtr4d 2774 | 1 ⊢ (𝜑 → ((𝐴 ·s 𝐵) ·s (𝐶 ·s 𝐷)) = ((𝐴 ·s 𝐶) ·s (𝐵 ·s 𝐷))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1540 ∈ wcel 2109 (class class class)co 7340 No csur 27532 ·s cmuls 27999 |
| 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 5214 ax-sep 5231 ax-nul 5241 ax-pow 5300 ax-pr 5367 ax-un 7662 |
| 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 3343 df-reu 3344 df-rab 3393 df-v 3435 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4281 df-if 4473 df-pw 4549 df-sn 4574 df-pr 4576 df-tp 4578 df-op 4580 df-ot 4582 df-uni 4857 df-int 4895 df-iun 4940 df-br 5089 df-opab 5151 df-mpt 5170 df-tr 5196 df-id 5508 df-eprel 5513 df-po 5521 df-so 5522 df-fr 5566 df-se 5567 df-we 5568 df-xp 5619 df-rel 5620 df-cnv 5621 df-co 5622 df-dm 5623 df-rn 5624 df-res 5625 df-ima 5626 df-pred 6243 df-ord 6304 df-on 6305 df-suc 6307 df-iota 6432 df-fun 6478 df-fn 6479 df-f 6480 df-f1 6481 df-fo 6482 df-f1o 6483 df-fv 6484 df-riota 7297 df-ov 7343 df-oprab 7344 df-mpo 7345 df-1st 7915 df-2nd 7916 df-frecs 8205 df-wrecs 8236 df-recs 8285 df-1o 8379 df-2o 8380 df-nadd 8575 df-no 27535 df-slt 27536 df-bday 27537 df-sle 27638 df-sslt 27675 df-scut 27677 df-0s 27722 df-made 27742 df-old 27743 df-left 27745 df-right 27746 df-norec 27835 df-norec2 27846 df-adds 27857 df-negs 27917 df-subs 27918 df-muls 28000 |
| This theorem is referenced by: divmuldivsd 28124 pw2recs 28315 |
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