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Theorem dju1en 7562
Description: Cardinal addition with cardinal one (which is the same as ordinal one). Used in proof of Theorem 6J of [Enderton] p. 143. (Contributed by NM, 28-Sep-2004.) (Revised by Mario Carneiro, 29-Apr-2015.)
Assertion
Ref Expression
dju1en  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  ( A 1o )  ~~  suc  A
)

Proof of Theorem dju1en
StepHypRef Expression
1 enrefg 7043 . . . 4  |-  ( A  e.  V  ->  A  ~~  A )
21adantr 276 . . 3  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  A  ~~  A )
3 ensn1g 7077 . . . . 5  |-  ( A  e.  V  ->  { A }  ~~  1o )
43ensymd 7063 . . . 4  |-  ( A  e.  V  ->  1o  ~~ 
{ A } )
54adantr 276 . . 3  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  1o  ~~  { A } )
6 simpr 110 . . . 4  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  -.  A  e.  A )
7 disjsn 3770 . . . 4  |-  ( ( A  i^i  { A } )  =  (/)  <->  -.  A  e.  A )
86, 7sylibr 134 . . 3  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  ( A  i^i  { A } )  =  (/) )
9 djuenun 7561 . . 3  |-  ( ( A  ~~  A  /\  1o  ~~  { A }  /\  ( A  i^i  { A } )  =  (/) )  ->  ( A 1o ) 
~~  ( A  u.  { A } ) )
102, 5, 8, 9syl3anc 1278 . 2  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  ( A 1o )  ~~  ( A  u.  { A }
) )
11 df-suc 4514 . 2  |-  suc  A  =  ( A  u.  { A } )
1210, 11breqtrrdi 4170 1  |-  ( ( A  e.  V  /\  -.  A  e.  A
)  ->  ( A 1o )  ~~  suc  A
)
Colors of variables: wff set class
Syntax hints:   -. wn 3    -> wi 4    /\ wa 104    = wceq 1402    e. wcel 2209    u. cun 3218    i^i cin 3219   (/)c0 3520   {csn 3708   class class class wbr 4128   suc csuc 4508   1oc1o 6673    ~~ cen 7013   ⊔ cdju 7370
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-in1 623  ax-in2 624  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-14 2212  ax-ext 2220  ax-coll 4244  ax-sep 4247  ax-nul 4257  ax-pow 4309  ax-pr 4344  ax-un 4576
This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-pw 3690  df-sn 3714  df-pr 3715  df-op 3717  df-uni 3934  df-iun 4012  df-br 4129  df-opab 4191  df-mpt 4192  df-tr 4228  df-id 4436  df-iord 4509  df-on 4511  df-suc 4514  df-xp 4778  df-rel 4779  df-cnv 4780  df-co 4781  df-dm 4782  df-rn 4783  df-res 4784  df-ima 4785  df-iota 5335  df-fun 5377  df-fn 5378  df-f 5379  df-f1 5380  df-fo 5381  df-f1o 5382  df-fv 5383  df-1st 6367  df-2nd 6368  df-1o 6680  df-er 6800  df-en 7016  df-dju 7371  df-inl 7380  df-inr 7381
This theorem is referenced by: (None)
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