MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  add1p1 Structured version   Visualization version   GIF version

Theorem add1p1 12472
Description: Adding two times 1 to a number. (Contributed by AV, 22-Sep-2018.)
Assertion
Ref Expression
add1p1 (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2))

Proof of Theorem add1p1
StepHypRef Expression
1 id 22 . . 3 (𝑁 ∈ ℂ → 𝑁 ∈ ℂ)
2 1cnd 11175 . . 3 (𝑁 ∈ ℂ → 1 ∈ ℂ)
31, 2, 2addassd 11204 . 2 (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + (1 + 1)))
4 1p1e2 12341 . . . 4 (1 + 1) = 2
54a1i 11 . . 3 (𝑁 ∈ ℂ → (1 + 1) = 2)
65oveq2d 7412 . 2 (𝑁 ∈ ℂ → (𝑁 + (1 + 1)) = (𝑁 + 2))
73, 6eqtrd 2797 1 (𝑁 ∈ ℂ → ((𝑁 + 1) + 1) = (𝑁 + 2))
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1560  wcel 2142  (class class class)co 7396  cc 11071  1c1 11074   + caddc 11076  2c2 12272
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1815  ax-4 1829  ax-5 1930  ax-6 1987  ax-7 2028  ax-8 2144  ax-9 2152  ax-ext 2734  ax-1cn 11131  ax-addass 11138
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1100  df-tru 1563  df-fal 1573  df-ex 1800  df-sb 2091  df-clab 2741  df-cleq 2754  df-clel 2837  df-rab 3415  df-v 3456  df-dif 3907  df-un 3909  df-ss 3921  df-nul 4286  df-if 4481  df-sn 4583  df-pr 4585  df-op 4589  df-uni 4866  df-br 5101  df-iota 6477  df-fv 6529  df-ov 7399  df-2 12280
This theorem is referenced by:  nneo  12657  ccatw2s1len  14639  chfacfscmul0  22918  chfacfscmulfsupp  22919  chfacfscmulgsum  22920  chfacfpmmul0  22922  chfacfpmmulfsupp  22923  chfacfpmmulgsum  22924  upgrwlkdvdelem  29936  poimirlem7  38126  fmtnoprmfac2  48176  fmtnofac1  48179  evenltle  48339  gpg5nbgrvtx03starlem2  48691
  Copyright terms: Public domain W3C validator