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| Mirrors > Home > MPE Home > Th. List > npcans | Structured version Visualization version GIF version | ||
| Description: Cancellation law for surreal subtraction. (Contributed by Scott Fenton, 4-Feb-2025.) |
| Ref | Expression |
|---|---|
| npcans | ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → ((𝐴 −s 𝐵) +s 𝐵) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | subscl 28457 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → (𝐴 −s 𝐵) ∈ No) | |
| 2 | simpr 490 | . . 3 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → 𝐵 ∈ No) | |
| 3 | 1, 2 | addscomd 28362 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → ((𝐴 −s 𝐵) +s 𝐵) = (𝐵 +s (𝐴 −s 𝐵))) |
| 4 | pncan3s 28468 | . . 3 ⊢ ((𝐵 ∈ No ∧ 𝐴 ∈ No) → (𝐵 +s (𝐴 −s 𝐵)) = 𝐴) | |
| 5 | 4 | ancoms 464 | . 2 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → (𝐵 +s (𝐴 −s 𝐵)) = 𝐴) |
| 6 | 3, 5 | eqtrd 2795 | 1 ⊢ ((𝐴 ∈ No ∧ 𝐵 ∈ No) → ((𝐴 −s 𝐵) +s 𝐵) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∈ wcel 2144 (class class class)co 7424 Nocsur 28006 +s cadds 28354 −s csubs 28415 |
| 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 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5327 ax-pr 5391 ax-un 7755 |
| 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 2099 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 3739 df-csb 3848 df-ss 3897 df-pss 4013 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-ot 4858 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-se 5605 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6307 df-ord 6368 df-on 6369 df-suc 6371 df-iota 6497 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7381 df-ov 7427 df-oprab 7428 df-mpo 7429 df-1st 8005 df-2nd 8006 df-frecs 8306 df-wrecs 8337 df-recs 8386 df-1o 8483 df-2o 8484 df-nadd 8682 df-no 28009 df-lts 28010 df-bday 28011 df-les 28111 df-slts 28153 df-cuts 28155 df-0s 28202 df-made 28222 df-old 28223 df-left 28225 df-right 28226 df-norec 28333 df-norec2 28344 df-adds 28355 df-negs 28416 df-subs 28417 |
| This theorem is used by: ltsubsubsbd 28478 ltsubaddsd 28484 lesubsd 28491 posdifsd 28493 subsge0d 28495 n0cut 28729 eucliddivs 28771 peano5uzs 28799 bdayfinbndlem1 28862 elreno2 28890 |
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