ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  1p2e3 GIF version

Theorem 1p2e3 8166
Description: 1 + 2 = 3 (common case). (Contributed by David A. Wheeler, 8-Dec-2018.)
Assertion
Ref Expression
1p2e3 (1 + 2) = 3

Proof of Theorem 1p2e3
StepHypRef Expression
1 2cn 8110 . 2 2 ∈ ℂ
2 ax-1cn 7069 . 2 1 ∈ ℂ
3 2p1e3 8165 . 2 (2 + 1) = 3
41, 2, 3addcomli 7253 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1284  (class class class)co 5532  1c1 6982   + caddc 6984  2c2 8089  3c3 8090
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106  ax-5 1376  ax-7 1377  ax-gen 1378  ax-ie1 1422  ax-ie2 1423  ax-8 1435  ax-11 1437  ax-4 1440  ax-17 1459  ax-i9 1463  ax-ial 1467  ax-i5r 1468  ax-ext 2063  ax-resscn 7068  ax-1cn 7069  ax-1re 7070  ax-addrcl 7073  ax-addcom 7076
This theorem depends on definitions:  df-bi 115  df-nf 1390  df-sb 1686  df-clab 2068  df-cleq 2074  df-clel 2077  df-in 2979  df-ss 2986  df-2 8098  df-3 8099
This theorem is referenced by:  binom3  9590  3lcm2e6woprm  10468  1kp2ke3k  10562
  Copyright terms: Public domain W3C validator