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Mirrors > Home > ILE Home > Th. List > addcanpig | GIF version |
Description: Addition cancellation law for positive integers. (Contributed by Jim Kingdon, 27-Aug-2019.) |
Ref | Expression |
---|---|
addcanpig | ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → ((𝐴 +N 𝐵) = (𝐴 +N 𝐶) ↔ 𝐵 = 𝐶)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | addpiord 7293 | . . . . 5 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N) → (𝐴 +N 𝐵) = (𝐴 +o 𝐵)) | |
2 | 1 | 3adant3 1017 | . . . 4 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → (𝐴 +N 𝐵) = (𝐴 +o 𝐵)) |
3 | addpiord 7293 | . . . . 5 ⊢ ((𝐴 ∈ N ∧ 𝐶 ∈ N) → (𝐴 +N 𝐶) = (𝐴 +o 𝐶)) | |
4 | 3 | 3adant2 1016 | . . . 4 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → (𝐴 +N 𝐶) = (𝐴 +o 𝐶)) |
5 | 2, 4 | eqeq12d 2192 | . . 3 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → ((𝐴 +N 𝐵) = (𝐴 +N 𝐶) ↔ (𝐴 +o 𝐵) = (𝐴 +o 𝐶))) |
6 | pinn 7286 | . . . 4 ⊢ (𝐴 ∈ N → 𝐴 ∈ ω) | |
7 | pinn 7286 | . . . 4 ⊢ (𝐵 ∈ N → 𝐵 ∈ ω) | |
8 | pinn 7286 | . . . 4 ⊢ (𝐶 ∈ N → 𝐶 ∈ ω) | |
9 | nnacan 6506 | . . . . 5 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴 +o 𝐵) = (𝐴 +o 𝐶) ↔ 𝐵 = 𝐶)) | |
10 | 9 | biimpd 144 | . . . 4 ⊢ ((𝐴 ∈ ω ∧ 𝐵 ∈ ω ∧ 𝐶 ∈ ω) → ((𝐴 +o 𝐵) = (𝐴 +o 𝐶) → 𝐵 = 𝐶)) |
11 | 6, 7, 8, 10 | syl3an 1280 | . . 3 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → ((𝐴 +o 𝐵) = (𝐴 +o 𝐶) → 𝐵 = 𝐶)) |
12 | 5, 11 | sylbid 150 | . 2 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → ((𝐴 +N 𝐵) = (𝐴 +N 𝐶) → 𝐵 = 𝐶)) |
13 | oveq2 5876 | . 2 ⊢ (𝐵 = 𝐶 → (𝐴 +N 𝐵) = (𝐴 +N 𝐶)) | |
14 | 12, 13 | impbid1 142 | 1 ⊢ ((𝐴 ∈ N ∧ 𝐵 ∈ N ∧ 𝐶 ∈ N) → ((𝐴 +N 𝐵) = (𝐴 +N 𝐶) ↔ 𝐵 = 𝐶)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 105 ∧ w3a 978 = wceq 1353 ∈ wcel 2148 ωcom 4585 (class class class)co 5868 +o coa 6407 Ncnpi 7249 +N cpli 7250 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 614 ax-in2 615 ax-io 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-13 2150 ax-14 2151 ax-ext 2159 ax-coll 4115 ax-sep 4118 ax-nul 4126 ax-pow 4171 ax-pr 4205 ax-un 4429 ax-setind 4532 ax-iinf 4583 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-fal 1359 df-nf 1461 df-sb 1763 df-eu 2029 df-mo 2030 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-ne 2348 df-ral 2460 df-rex 2461 df-reu 2462 df-rab 2464 df-v 2739 df-sbc 2963 df-csb 3058 df-dif 3131 df-un 3133 df-in 3135 df-ss 3142 df-nul 3423 df-pw 3576 df-sn 3597 df-pr 3598 df-op 3600 df-uni 3808 df-int 3843 df-iun 3886 df-br 4001 df-opab 4062 df-mpt 4063 df-tr 4099 df-id 4289 df-iord 4362 df-on 4364 df-suc 4367 df-iom 4586 df-xp 4628 df-rel 4629 df-cnv 4630 df-co 4631 df-dm 4632 df-rn 4633 df-res 4634 df-ima 4635 df-iota 5173 df-fun 5213 df-fn 5214 df-f 5215 df-f1 5216 df-fo 5217 df-f1o 5218 df-fv 5219 df-ov 5871 df-oprab 5872 df-mpo 5873 df-1st 6134 df-2nd 6135 df-recs 6299 df-irdg 6364 df-oadd 6414 df-ni 7281 df-pli 7282 |
This theorem is referenced by: (None) |
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