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Theorem eninr 7063
Description: Equinumerosity of a set and its image under right injection. (Contributed by Jim Kingdon, 30-Jul-2023.)
Assertion
Ref Expression
eninr  |-  ( A  e.  V  ->  (inr " A )  ~~  A
)

Proof of Theorem eninr
StepHypRef Expression
1 djurf1or 7022 . . . 4  |-  (inr  |`  A ) : A -1-1-onto-> ( { 1o }  X.  A )
2 f1oeng 6723 . . . 4  |-  ( ( A  e.  V  /\  (inr  |`  A ) : A -1-1-onto-> ( { 1o }  X.  A ) )  ->  A  ~~  ( { 1o }  X.  A ) )
31, 2mpan2 422 . . 3  |-  ( A  e.  V  ->  A  ~~  ( { 1o }  X.  A ) )
4 df-ima 4617 . . . 4  |-  (inr " A )  =  ran  (inr  |`  A )
5 dff1o5 5441 . . . . . 6  |-  ( (inr  |`  A ) : A -1-1-onto-> ( { 1o }  X.  A
)  <->  ( (inr  |`  A ) : A -1-1-> ( { 1o }  X.  A
)  /\  ran  (inr  |`  A )  =  ( { 1o }  X.  A ) ) )
61, 5mpbi 144 . . . . 5  |-  ( (inr  |`  A ) : A -1-1-> ( { 1o }  X.  A )  /\  ran  (inr  |`  A )  =  ( { 1o }  X.  A ) )
76simpri 112 . . . 4  |-  ran  (inr  |`  A )  =  ( { 1o }  X.  A )
84, 7eqtri 2186 . . 3  |-  (inr " A )  =  ( { 1o }  X.  A )
93, 8breqtrrdi 4024 . 2  |-  ( A  e.  V  ->  A  ~~  (inr " A ) )
109ensymd 6749 1  |-  ( A  e.  V  ->  (inr " A )  ~~  A
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    = wceq 1343    e. wcel 2136   {csn 3576   class class class wbr 3982    X. cxp 4602   ran crn 4605    |` cres 4606   "cima 4607   -1-1->wf1 5185   -1-1-onto->wf1o 5187   1oc1o 6377    ~~ cen 6704  inrcinr 7011
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-13 2138  ax-14 2139  ax-ext 2147  ax-coll 4097  ax-sep 4100  ax-nul 4108  ax-pow 4153  ax-pr 4187  ax-un 4411
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-reu 2451  df-rab 2453  df-v 2728  df-sbc 2952  df-csb 3046  df-dif 3118  df-un 3120  df-in 3122  df-ss 3129  df-nul 3410  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-uni 3790  df-iun 3868  df-br 3983  df-opab 4044  df-mpt 4045  df-tr 4081  df-id 4271  df-iord 4344  df-on 4346  df-suc 4349  df-xp 4610  df-rel 4611  df-cnv 4612  df-co 4613  df-dm 4614  df-rn 4615  df-res 4616  df-ima 4617  df-iota 5153  df-fun 5190  df-fn 5191  df-f 5192  df-f1 5193  df-fo 5194  df-f1o 5195  df-fv 5196  df-1st 6108  df-2nd 6109  df-1o 6384  df-er 6501  df-en 6707  df-inr 7013
This theorem is referenced by:  endjudisj  7166  djuen  7167
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