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Theorem oa1suc 7180
Description: Addition with 1 is same as successor. Proposition 4.34(a) of [Mendelson] p. 266. (Contributed by NM, 29-Oct-1995.) (Revised by Mario Carneiro, 16-Nov-2014.)
Assertion
Ref Expression
oa1suc  |-  ( A  e.  On  ->  ( A  +o  1o )  =  suc  A )

Proof of Theorem oa1suc
StepHypRef Expression
1 df-1o 7129 . . . 4  |-  1o  =  suc  (/)
21oveq2i 6289 . . 3  |-  ( A  +o  1o )  =  ( A  +o  suc  (/) )
3 peano1 6701 . . . 4  |-  (/)  e.  om
4 onasuc 7177 . . . 4  |-  ( ( A  e.  On  /\  (/) 
e.  om )  ->  ( A  +o  suc  (/) )  =  suc  ( A  +o  (/) ) )
53, 4mpan2 671 . . 3  |-  ( A  e.  On  ->  ( A  +o  suc  (/) )  =  suc  ( A  +o  (/) ) )
62, 5syl5eq 2494 . 2  |-  ( A  e.  On  ->  ( A  +o  1o )  =  suc  ( A  +o  (/) ) )
7 oa0 7165 . . 3  |-  ( A  e.  On  ->  ( A  +o  (/) )  =  A )
8 suceq 4930 . . 3  |-  ( ( A  +o  (/) )  =  A  ->  suc  ( A  +o  (/) )  =  suc  A )
97, 8syl 16 . 2  |-  ( A  e.  On  ->  suc  ( A  +o  (/) )  =  suc  A )
106, 9eqtrd 2482 1  |-  ( A  e.  On  ->  ( A  +o  1o )  =  suc  A )
Colors of variables: wff setvar class
Syntax hints:    -> wi 4    = wceq 1381    e. wcel 1802   (/)c0 3768   Oncon0 4865   suc csuc 4867  (class class class)co 6278   omcom 6682   1oc1o 7122    +o coa 7126
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1603  ax-4 1616  ax-5 1689  ax-6 1732  ax-7 1774  ax-8 1804  ax-9 1806  ax-10 1821  ax-11 1826  ax-12 1838  ax-13 1983  ax-ext 2419  ax-sep 4555  ax-nul 4563  ax-pow 4612  ax-pr 4673  ax-un 6574
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3or 973  df-3an 974  df-tru 1384  df-ex 1598  df-nf 1602  df-sb 1725  df-eu 2270  df-mo 2271  df-clab 2427  df-cleq 2433  df-clel 2436  df-nfc 2591  df-ne 2638  df-ral 2796  df-rex 2797  df-reu 2798  df-rab 2800  df-v 3095  df-sbc 3312  df-csb 3419  df-dif 3462  df-un 3464  df-in 3466  df-ss 3473  df-pss 3475  df-nul 3769  df-if 3924  df-pw 3996  df-sn 4012  df-pr 4014  df-tp 4016  df-op 4018  df-uni 4232  df-iun 4314  df-br 4435  df-opab 4493  df-mpt 4494  df-tr 4528  df-eprel 4778  df-id 4782  df-po 4787  df-so 4788  df-fr 4825  df-we 4827  df-ord 4868  df-on 4869  df-lim 4870  df-suc 4871  df-xp 4992  df-rel 4993  df-cnv 4994  df-co 4995  df-dm 4996  df-rn 4997  df-res 4998  df-ima 4999  df-iota 5538  df-fun 5577  df-fn 5578  df-f 5579  df-f1 5580  df-fo 5581  df-f1o 5582  df-fv 5583  df-ov 6281  df-oprab 6282  df-mpt2 6283  df-om 6683  df-recs 7041  df-rdg 7075  df-1o 7129  df-oadd 7133
This theorem is referenced by:  o1p1e2  7189  om1r  7191  omlimcl  7226  oneo  7229  oeeui  7250  nnneo  7299  nneob  7300  oancom  8068  indpi  9285
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