ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  8p2e10 Unicode version

Theorem 8p2e10 9835
Description: 8 + 2 = 10. (Contributed by NM, 5-Feb-2007.) (Revised by Stanislas Polu, 7-Apr-2020.) (Revised by AV, 6-Sep-2021.)
Assertion
Ref Expression
8p2e10  |-  ( 8  +  2 )  = ; 1
0

Proof of Theorem 8p2e10
StepHypRef Expression
1 df-2 9342 . . . 4  |-  2  =  ( 1  +  1 )
21oveq2i 6086 . . 3  |-  ( 8  +  2 )  =  ( 8  +  ( 1  +  1 ) )
3 8cn 9369 . . . 4  |-  8  e.  CC
4 ax-1cn 8262 . . . 4  |-  1  e.  CC
53, 4, 4addassi 8324 . . 3  |-  ( ( 8  +  1 )  +  1 )  =  ( 8  +  ( 1  +  1 ) )
62, 5eqtr4i 2262 . 2  |-  ( 8  +  2 )  =  ( ( 8  +  1 )  +  1 )
7 df-9 9349 . . 3  |-  9  =  ( 8  +  1 )
87oveq1i 6085 . 2  |-  ( 9  +  1 )  =  ( ( 8  +  1 )  +  1 )
9 9p1e10 9758 . 2  |-  ( 9  +  1 )  = ; 1
0
106, 8, 93eqtr2i 2265 1  |-  ( 8  +  2 )  = ; 1
0
Colors of variables: wff set class
Syntax hints:    = wceq 1402  (class class class)co 6075   0cc0 8169   1c1 8170    + caddc 8172   2c2 9334   8c8 9340   9c9 9341  ;cdc 9756
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-sep 4244  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-mulcom 8270  ax-addass 8271  ax-mulass 8272  ax-distr 8273  ax-1rid 8276  ax-0id 8277  ax-cnre 8280
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-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-br 4126  df-iota 5332  df-fv 5380  df-ov 6078  df-inn 9284  df-2 9342  df-3 9343  df-4 9344  df-5 9345  df-6 9346  df-7 9347  df-8 9348  df-9 9349  df-dec 9757
This theorem is referenced by:  8p3e11  9836  8t5e40  9873
  Copyright terms: Public domain W3C validator