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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 11229 | . . 3 ⊢ (𝑁 ∈ ℂ → 1 ∈ ℂ) | |
| 3 | 1, 2, 2 | addassd 11258 | . 2 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1))) |
| 4 | 1p1e2 12391 | . . . 4 ⊢ (1 + 1) = 2 | |
| 5 | 4 | a1i 11 | . . 3 ⊢ (𝑁 ∈ ℂ → (1 + 1) = 2) |
| 6 | 5 | oveq2d 7430 | . 2 ⊢ (𝑁 ∈ ℂ → (𝑁 + (1 + 1)) = (𝑁 + 2)) |
| 7 | 3, 6 | eqtrd 2795 | 1 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 (class class class)co 7414 ℂcc 11125 1c1 11128 + caddc 11130 2c2 12322 |
| 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-ext 2732 ax-1cn 11185 ax-addass 11192 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2739 df-cleq 2752 df-clel 2835 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-iota 6489 df-fv 6541 df-ov 7417 df-2 12330 |
| This theorem is used by: nneo 12708 ccatw2s1len 14696 chfacfscmul0 23086 chfacfscmulfsupp 23087 chfacfscmulgsum 23088 chfacfpmmul0 23090 chfacfpmmulfsupp 23091 chfacfpmmulgsum 23092 upgrwlkdvdelem 30204 poimirlem7 38379 fmtnoprmfac2 48473 fmtnofac1 48476 evenltle 48636 gpg5nbgrvtx03starlem2 48988 |
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