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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 22 | . . 3 ⊢ (𝑁 ∈ ℂ → 𝑁 ∈ ℂ) | |
| 2 | 1cnd 11127 | . . 3 ⊢ (𝑁 ∈ ℂ → 1 ∈ ℂ) | |
| 3 | 1, 2, 2 | addassd 11154 | . 2 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1))) |
| 4 | 1p1e2 12265 | . . . 4 ⊢ (1 + 1) = 2 | |
| 5 | 4 | a1i 11 | . . 3 ⊢ (𝑁 ∈ ℂ → (1 + 1) = 2) |
| 6 | 5 | oveq2d 7374 | . 2 ⊢ (𝑁 ∈ ℂ → (𝑁 + (1 + 1)) = (𝑁 + 2)) |
| 7 | 3, 6 | eqtrd 2771 | 1 ⊢ (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2113 (class class class)co 7358 ℂcc 11024 1c1 11027 + caddc 11029 2c2 12200 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11084 ax-addass 11091 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-iota 6448 df-fv 6500 df-ov 7361 df-2 12208 |
| This theorem is referenced by: nneo 12576 ccatw2s1len 14549 chfacfscmul0 22802 chfacfscmulfsupp 22803 chfacfscmulgsum 22804 chfacfpmmul0 22806 chfacfpmmulfsupp 22807 chfacfpmmulgsum 22808 upgrwlkdvdelem 29809 poimirlem7 37828 fmtnoprmfac2 47823 fmtnofac1 47826 evenltle 47973 gpg5nbgrvtx03starlem2 48325 |
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