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

Theorem 1p2e3 9125
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 9061 . 2 2 ∈ ℂ
2 ax-1cn 7972 . 2 1 ∈ ℂ
3 2p1e3 9124 . 2 (2 + 1) = 3
41, 2, 3addcomli 8171 1 (1 + 2) = 3
Colors of variables: wff set class
Syntax hints:   = wceq 1364  (class class class)co 5922  1c1 7880   + caddc 7882  2c2 9041  3c3 9042
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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-11 1520  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-ext 2178  ax-resscn 7971  ax-1cn 7972  ax-1re 7973  ax-addrcl 7976  ax-addcom 7979
This theorem depends on definitions:  df-bi 117  df-nf 1475  df-sb 1777  df-clab 2183  df-cleq 2189  df-clel 2192  df-in 3163  df-ss 3170  df-2 9049  df-3 9050
This theorem is referenced by:  binom3  10749  3lcm2e6woprm  12254  2exp16  12606  1kp2ke3k  15370
  Copyright terms: Public domain W3C validator