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Theorem cnvimass 5099
Description: A preimage under any class is included in the domain of the class. (Contributed by FL, 29-Jan-2007.)
Assertion
Ref Expression
cnvimass  |-  ( `' A " B ) 
C_  dom  A

Proof of Theorem cnvimass
StepHypRef Expression
1 imassrn 5087 . 2  |-  ( `' A " B ) 
C_  ran  `' A
2 dfdm4 4923 . 2  |-  dom  A  =  ran  `' A
31, 2sseqtrri 3262 1  |-  ( `' A " B ) 
C_  dom  A
Colors of variables: wff set class
Syntax hints:    C_ wss 3200   `'ccnv 4724   dom cdm 4725   ran crn 4726   "cima 4728
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-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-14 2205  ax-ext 2213  ax-sep 4207  ax-pow 4264  ax-pr 4299
This theorem depends on definitions:  df-bi 117  df-3an 1006  df-tru 1400  df-nf 1509  df-sb 1811  df-eu 2082  df-mo 2083  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-ral 2515  df-rex 2516  df-v 2804  df-un 3204  df-in 3206  df-ss 3213  df-pw 3654  df-sn 3675  df-pr 3676  df-op 3678  df-br 4089  df-opab 4151  df-xp 4731  df-cnv 4733  df-dm 4735  df-rn 4736  df-res 4737  df-ima 4738
This theorem is referenced by:  fvimacnvi  5761  elpreima  5766  fconst4m  5873  pw2f1odclem  7019  nn0supp  9453  fisumss  11952  fprodssdc  12150  1arith  12939  ghmpreima  13852  psrbagfi  14686  cnpnei  14942  cnclima  14946  cnntri  14947  cnntr  14948  cncnp  14953  cnrest2  14959  cndis  14964  txcnmpt  14996  txdis1cn  15001  hmeoimaf1o  15037  xmeter  15159
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