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| Mirrors > Home > MPE Home > Th. List > subsubs2d | Structured version Visualization version GIF version | ||
| Description: Law for double surreal subtraction. (Contributed by Scott Fenton, 16-Apr-2025.) |
| Ref | Expression |
|---|---|
| subsubs4d.1 | ⊢ (𝜑 → 𝐴 ∈ No ) |
| subsubs4d.2 | ⊢ (𝜑 → 𝐵 ∈ No ) |
| subsubs4d.3 | ⊢ (𝜑 → 𝐶 ∈ No ) |
| Ref | Expression |
|---|---|
| subsubs2d | ⊢ (𝜑 → (𝐴 -s (𝐵 -s 𝐶)) = (𝐴 +s (𝐶 -s 𝐵))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | subsubs4d.1 | . . 3 ⊢ (𝜑 → 𝐴 ∈ No ) | |
| 2 | subsubs4d.2 | . . . 4 ⊢ (𝜑 → 𝐵 ∈ No ) | |
| 3 | subsubs4d.3 | . . . 4 ⊢ (𝜑 → 𝐶 ∈ No ) | |
| 4 | 2, 3 | subscld 28328 | . . 3 ⊢ (𝜑 → (𝐵 -s 𝐶) ∈ No ) |
| 5 | 1, 4 | subsvald 28326 | . 2 ⊢ (𝜑 → (𝐴 -s (𝐵 -s 𝐶)) = (𝐴 +s ( -us ‘(𝐵 -s 𝐶)))) |
| 6 | 2, 3 | negsubsdi2d 28345 | . . 3 ⊢ (𝜑 → ( -us ‘(𝐵 -s 𝐶)) = (𝐶 -s 𝐵)) |
| 7 | 6 | oveq2d 7429 | . 2 ⊢ (𝜑 → (𝐴 +s ( -us ‘(𝐵 -s 𝐶))) = (𝐴 +s (𝐶 -s 𝐵))) |
| 8 | 5, 7 | eqtrd 2795 | 1 ⊢ (𝜑 → (𝐴 -s (𝐵 -s 𝐶)) = (𝐴 +s (𝐶 -s 𝐵))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 ‘cfv 6533 (class class class)co 7413 No csur 27876 +s cadds 28224 -us cnegs 28284 -s csubs 28285 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-ot 4593 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-se 5609 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-1st 7986 df-2nd 7987 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-1o 8455 df-2o 8456 df-nadd 8654 df-no 27879 df-lts 27880 df-bday 27881 df-les 27981 df-slts 28023 df-cuts 28025 df-0s 28072 df-made 28092 df-old 28093 df-left 28095 df-right 28096 df-norec 28203 df-norec2 28214 df-adds 28225 df-negs 28286 df-subs 28287 |
| This theorem is used by: nncansd 28362 mulsunif2lem 28434 n0subs 28628 zmulscld 28662 |
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