ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  5p3e8 GIF version

Theorem 5p3e8 9434
Description: 5 + 3 = 8. (Contributed by NM, 11-May-2004.)
Assertion
Ref Expression
5p3e8 (5 + 3) = 8

Proof of Theorem 5p3e8
StepHypRef Expression
1 df-3 9346 . . . 4 3 = (2 + 1)
21oveq2i 6089 . . 3 (5 + 3) = (5 + (2 + 1))
3 5cn 9366 . . . 4 5 ∈ ℂ
4 2cn 9357 . . . 4 2 ∈ ℂ
5 ax-1cn 8265 . . . 4 1 ∈ ℂ
63, 4, 5addassi 8327 . . 3 ((5 + 2) + 1) = (5 + (2 + 1))
72, 6eqtr4i 2262 . 2 (5 + 3) = ((5 + 2) + 1)
8 df-8 9351 . . 3 8 = (7 + 1)
9 5p2e7 9433 . . . 4 (5 + 2) = 7
109oveq1i 6088 . . 3 ((5 + 2) + 1) = (7 + 1)
118, 10eqtr4i 2262 . 2 8 = ((5 + 2) + 1)
127, 11eqtr4i 2262 1 (5 + 3) = 8
Colors of variables: wff set class
Syntax hints:   = wceq 1402  (class class class)co 6078  1c1 8173   + caddc 8175  2c2 9337  3c3 9338  5c5 9340  7c7 9342  8c8 9343
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-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220  ax-resscn 8264  ax-1cn 8265  ax-1re 8266  ax-addrcl 8269  ax-addass 8274
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-br 4129  df-iota 5335  df-fv 5383  df-ov 6081  df-2 9345  df-3 9346  df-4 9347  df-5 9348  df-6 9349  df-7 9350  df-8 9351
This theorem is referenced by:  5p4e9  9435  ef01bndlem  12504  2exp16  13197  lgsdir2lem1  16064
  Copyright terms: Public domain W3C validator