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| Mirrors > Home > MPE Home > Th. List > subsdird | Structured version Visualization version GIF version | ||
| Description: Distribution of surreal multiplication over subtraction. (Contributed by Scott Fenton, 9-Mar-2025.) |
| Ref | Expression |
|---|---|
| addsdid.1 | ⊢ (𝜑 → 𝐴 ∈ No) |
| addsdid.2 | ⊢ (𝜑 → 𝐵 ∈ No) |
| addsdid.3 | ⊢ (𝜑 → 𝐶 ∈ No) |
| Ref | Expression |
|---|---|
| subsdird | ⊢ (𝜑 → ((𝐴 −s 𝐵) ·s 𝐶) = ((𝐴 ·s 𝐶) −s (𝐵 ·s 𝐶))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | addsdid.3 | . . 3 ⊢ (𝜑 → 𝐶 ∈ No) | |
| 2 | addsdid.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No) | |
| 3 | addsdid.2 | . . 3 ⊢ (𝜑 → 𝐵 ∈ No) | |
| 4 | 1, 2, 3 | subsdid 28556 | . 2 ⊢ (𝜑 → (𝐶 ·s (𝐴 −s 𝐵)) = ((𝐶 ·s 𝐴) −s (𝐶 ·s 𝐵))) |
| 5 | 2, 3 | subscld 28461 | . . 3 ⊢ (𝜑 → (𝐴 −s 𝐵) ∈ No) |
| 6 | 5, 1 | mulscomd 28538 | . 2 ⊢ (𝜑 → ((𝐴 −s 𝐵) ·s 𝐶) = (𝐶 ·s (𝐴 −s 𝐵))) |
| 7 | 2, 1 | mulscomd 28538 | . . 3 ⊢ (𝜑 → (𝐴 ·s 𝐶) = (𝐶 ·s 𝐴)) |
| 8 | 3, 1 | mulscomd 28538 | . . 3 ⊢ (𝜑 → (𝐵 ·s 𝐶) = (𝐶 ·s 𝐵)) |
| 9 | 7, 8 | oveq12d 7445 | . 2 ⊢ (𝜑 → ((𝐴 ·s 𝐶) −s (𝐵 ·s 𝐶)) = ((𝐶 ·s 𝐴) −s (𝐶 ·s 𝐵))) |
| 10 | 4, 6, 9 | 3eqtr4d 2808 | 1 ⊢ (𝜑 → ((𝐴 −s 𝐵) ·s 𝐶) = ((𝐴 ·s 𝐶) −s (𝐵 ·s 𝐶))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2146 (class class class)co 7427 Nocsur 28009 −s csubs 28418 ·s cmuls 28504 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-rep 5234 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-ral 3080 df-rex 3090 df-rmo 3368 df-reu 3369 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-pss 4016 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4838 df-ot 4861 df-uni 4870 df-int 4910 df-iun 4955 df-br 5106 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5549 df-eprel 5554 df-po 5562 df-so 5563 df-fr 5607 df-se 5608 df-we 5609 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-pred 6310 df-ord 6371 df-on 6372 df-suc 6374 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-riota 7384 df-ov 7430 df-oprab 7431 df-mpo 7432 df-1st 8008 df-2nd 8009 df-frecs 8310 df-wrecs 8341 df-recs 8390 df-1o 8487 df-2o 8488 df-nadd 8686 df-no 28012 df-lts 28013 df-bday 28014 df-les 28114 df-slts 28156 df-cuts 28158 df-0s 28205 df-made 28225 df-old 28226 df-left 28228 df-right 28229 df-norec 28336 df-norec2 28347 df-adds 28358 df-negs 28419 df-subs 28420 df-muls 28505 |
| This theorem is used by: mulsasslem3 28563 mulsunif2lem 28567 precsexlem11 28615 zmulscld 28795 |
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