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Theorem oa1suc 6484
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 6433 . . . 4  |-  1o  =  suc  (/)
21oveq2i 5789 . . 3  |-  ( A  +o  1o )  =  ( A  +o  suc  (/) )
3 peano1 4633 . . . 4  |-  (/)  e.  om
4 onasuc 6481 . . . 4  |-  ( ( A  e.  On  /\  (/) 
e.  om )  ->  ( A  +o  suc  (/) )  =  suc  ( A  +o  (/) ) )
53, 4mpan2 655 . . 3  |-  ( A  e.  On  ->  ( A  +o  suc  (/) )  =  suc  ( A  +o  (/) ) )
62, 5syl5eq 2300 . 2  |-  ( A  e.  On  ->  ( A  +o  1o )  =  suc  ( A  +o  (/) ) )
7 oa0 6469 . . 3  |-  ( A  e.  On  ->  ( A  +o  (/) )  =  A )
8 suceq 4415 . . 3  |-  ( ( A  +o  (/) )  =  A  ->  suc  ( A  +o  (/) )  =  suc  A )
97, 8syl 17 . 2  |-  ( A  e.  On  ->  suc  ( A  +o  (/) )  =  suc  A )
106, 9eqtrd 2288 1  |-  ( A  e.  On  ->  ( A  +o  1o )  =  suc  A )
Colors of variables: wff set class
Syntax hints:    -> wi 6    = wceq 1619    e. wcel 1621   (/)c0 3416   Oncon0 4350   suc csuc 4352   omcom 4614  (class class class)co 5778   1oc1o 6426    +o coa 6430
This theorem is referenced by:  o1p1e2  6493  om1r  6495  omlimcl  6530  oneo  6533  oeeui  6554  nnneo  6603  nneob  6604  oancom  7306  indpi  8485
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10  ax-5 1533  ax-6 1534  ax-7 1535  ax-gen 1536  ax-8 1623  ax-11 1624  ax-13 1625  ax-14 1626  ax-17 1628  ax-12o 1664  ax-10 1678  ax-9 1684  ax-4 1692  ax-16 1927  ax-ext 2237  ax-sep 4101  ax-nul 4109  ax-pr 4172  ax-un 4470
This theorem depends on definitions:  df-bi 179  df-or 361  df-an 362  df-3or 940  df-3an 941  df-tru 1315  df-ex 1538  df-nf 1540  df-sb 1884  df-eu 2121  df-mo 2122  df-clab 2243  df-cleq 2249  df-clel 2252  df-nfc 2381  df-ne 2421  df-ral 2521  df-rex 2522  df-reu 2523  df-rab 2525  df-v 2759  df-sbc 2953  df-csb 3043  df-dif 3116  df-un 3118  df-in 3120  df-ss 3127  df-pss 3129  df-nul 3417  df-if 3526  df-pw 3587  df-sn 3606  df-pr 3607  df-tp 3608  df-op 3609  df-uni 3788  df-iun 3867  df-br 3984  df-opab 4038  df-mpt 4039  df-tr 4074  df-eprel 4263  df-id 4267  df-po 4272  df-so 4273  df-fr 4310  df-we 4312  df-ord 4353  df-on 4354  df-lim 4355  df-suc 4356  df-om 4615  df-xp 4661  df-rel 4662  df-cnv 4663  df-co 4664  df-dm 4665  df-rn 4666  df-res 4667  df-ima 4668  df-fun 4669  df-fn 4670  df-f 4671  df-f1 4672  df-fo 4673  df-f1o 4674  df-fv 4675  df-ov 5781  df-oprab 5782  df-mpt2 5783  df-recs 6342  df-rdg 6377  df-1o 6433  df-oadd 6437
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