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| Mirrors > Home > MPE Home > Th. List > add1p1 | Structured version Visualization version GIF version | ||
| Description: Adding two times 1 to a number. (Contributed by AV, 22-Sep-2018.) |
| Ref | Expression |
|---|---|
| add1p1 | ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | id 23 | . . 3 ⊢ (𝑁 ∈ ℂ → 𝑁 ∈ ℂ) | |
| 2 | 1cnd 11315 | . . 3 ⊢ (𝑁 ∈ ℂ → 1 ∈ ℂ) | |
| 3 | 1, 2, 2 | addassd 11344 | . 2 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1))) |
| 4 | 1p1e2 12479 | . . . 4 ⊢ (1 + 1) = 2 | |
| 5 | 4 | a1i 11 | . . 3 ⊢ (𝑁 ∈ ℂ → (1 + 1) = 2) |
| 6 | 5 | oveq2d 7446 | . 2 ⊢ (𝑁 ∈ ℂ → (𝑁 + (1 + 1)) = (𝑁 + 2)) |
| 7 | 3, 6 | eqtrd 2798 | 1 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2146 (class class class)co 7430 ℂcc 11211 1c1 11214 + caddc 11216 2c2 12410 |
| 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-ext 2735 ax-1cn 11271 ax-addass 11278 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2101 df-clab 2742 df-cleq 2755 df-clel 2839 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-uni 4871 df-br 5107 df-iota 6501 df-fv 6555 df-ov 7433 df-2 12418 |
| This theorem is used by: nneo 12796 ccatw2s1len 14787 chfacfscmul0 23191 chfacfscmulfsupp 23192 chfacfscmulgsum 23193 chfacfpmmul0 23195 chfacfpmmulfsupp 23196 chfacfpmmulgsum 23197 upgrwlkdvdelem 30337 poimirlem7 38691 fmtnoprmfac2 48797 fmtnofac1 48800 evenltle 48960 gpg5nbgrvtx03starlem2 49312 |
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