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Theorem djurcl 7050
Description: Right closure of disjoint union. (Contributed by Jim Kingdon, 21-Jun-2022.)
Assertion
Ref Expression
djurcl  |-  ( C  e.  B  ->  (inr `  C )  e.  ( A B ) )

Proof of Theorem djurcl
Dummy variable  x is distinct from all other variables.
StepHypRef Expression
1 elex 2748 . . 3  |-  ( C  e.  B  ->  C  e.  _V )
2 1oex 6424 . . . . 5  |-  1o  e.  _V
32snid 3623 . . . 4  |-  1o  e.  { 1o }
4 opelxpi 4658 . . . 4  |-  ( ( 1o  e.  { 1o }  /\  C  e.  B
)  ->  <. 1o ,  C >.  e.  ( { 1o }  X.  B
) )
53, 4mpan 424 . . 3  |-  ( C  e.  B  ->  <. 1o ,  C >.  e.  ( { 1o }  X.  B
) )
6 opeq2 3779 . . . 4  |-  ( x  =  C  ->  <. 1o ,  x >.  =  <. 1o ,  C >. )
7 df-inr 7046 . . . 4  |- inr  =  ( x  e.  _V  |->  <. 1o ,  x >. )
86, 7fvmptg 5592 . . 3  |-  ( ( C  e.  _V  /\  <. 1o ,  C >.  e.  ( { 1o }  X.  B ) )  -> 
(inr `  C )  =  <. 1o ,  C >. )
91, 5, 8syl2anc 411 . 2  |-  ( C  e.  B  ->  (inr `  C )  =  <. 1o ,  C >. )
10 elun2 3303 . . . 4  |-  ( <. 1o ,  C >.  e.  ( { 1o }  X.  B )  ->  <. 1o ,  C >.  e.  ( ( { (/) }  X.  A
)  u.  ( { 1o }  X.  B
) ) )
115, 10syl 14 . . 3  |-  ( C  e.  B  ->  <. 1o ,  C >.  e.  ( ( { (/) }  X.  A
)  u.  ( { 1o }  X.  B
) ) )
12 df-dju 7036 . . 3  |-  ( A B )  =  ( ( { (/) }  X.  A )  u.  ( { 1o }  X.  B
) )
1311, 12eleqtrrdi 2271 . 2  |-  ( C  e.  B  ->  <. 1o ,  C >.  e.  ( A B ) )
149, 13eqeltrd 2254 1  |-  ( C  e.  B  ->  (inr `  C )  e.  ( A B ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    = wceq 1353    e. wcel 2148   _Vcvv 2737    u. cun 3127   (/)c0 3422   {csn 3592   <.cop 3595    X. cxp 4624   ` cfv 5216   1oc1o 6409   ⊔ cdju 7035  inrcinr 7044
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 614  ax-in2 615  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-sep 4121  ax-nul 4129  ax-pow 4174  ax-pr 4209  ax-un 4433
This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-v 2739  df-sbc 2963  df-dif 3131  df-un 3133  df-in 3135  df-ss 3142  df-nul 3423  df-pw 3577  df-sn 3598  df-pr 3599  df-op 3601  df-uni 3810  df-br 4004  df-opab 4065  df-mpt 4066  df-tr 4102  df-id 4293  df-iord 4366  df-on 4368  df-suc 4371  df-xp 4632  df-rel 4633  df-cnv 4634  df-co 4635  df-dm 4636  df-iota 5178  df-fun 5218  df-fv 5224  df-1o 6416  df-dju 7036  df-inr 7046
This theorem is referenced by:  updjudhcoinrg  7079  omp1eomlem  7092  difinfsnlem  7097  difinfsn  7098  0ct  7105  ctmlemr  7106  ctssdclemn0  7108  exmidfodomrlemr  7200  exmidfodomrlemrALT  7201
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