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

Theorem 1p2e3 9078
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 9015 . 2 2 ∈ ℂ
2 ax-1cn 7929 . 2 1 ∈ ℂ
3 2p1e3 9077 . 2 (2 + 1) = 3
41, 2, 3addcomli 8127 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1364  (class class class)co 5892  1c1 7837   + caddc 7839  2c2 8995  3c3 8996
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-11 1517  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-ext 2171  ax-resscn 7928  ax-1cn 7929  ax-1re 7930  ax-addrcl 7933  ax-addcom 7936
This theorem depends on definitions:  df-bi 117  df-nf 1472  df-sb 1774  df-clab 2176  df-cleq 2182  df-clel 2185  df-in 3150  df-ss 3157  df-2 9003  df-3 9004
This theorem is referenced by:  binom3  10664  3lcm2e6woprm  12113  1kp2ke3k  14913
  Copyright terms: Public domain W3C validator