Theorem cnvimass 3423

Description: A pre-image under any class is included in the domain of the class. (Contributed by FL, 29-Jan-2007.)

Assertion

Ref	Expression
cnvimass	|- (`'A"B) (_ dom A

Proof of Theorem cnvimass

Step	Hyp	Ref	Expression
1		imassrn 3415	. 2 |- (`'A"B) (_ ran `' A
2		dfdm4 3305	. 2 |- dom A = ran `' A
3	1, 2	sseqtr4 2094	1 |- (`'A"B) (_ dom A

Syntax hints:   (_ wss 2047  `'ccnv 3169  dom cdm 3170  ran crn 3171  "cima 3173

This theorem is referenced by:  fvimacnvi 3804  fconst4 3851  iscncl 7770  cncnplem4 7777

This theorem was proved from axioms:  ax-1 4  ax-2 5  ax-3 6  ax-mp 7  ax-7 962  ax-gen 963  ax-8 964  ax-10 966  ax-11 967  ax-12 968  ax-13 969  ax-14 970  ax-17 971  ax-4 973  ax-5o 975  ax-6o 978  ax-9o 1123  ax-10o 1140  ax-16 1210  ax-11o 1218  ax-ext 1459  ax-sep 2703  ax-pow 2742  ax-pr 2779

This theorem depends on definitions:  df-bi 147  df-or 224  df-an 225  df-ex 981  df-sb 1172  df-eu 1382  df-mo 1383  df-clab 1464  df-cleq 1469  df-clel 1472  df-ne 1587  df-rex 1650  df-v 1812  df-dif 2049  df-un 2050  df-in 2051  df-ss 2053  df-nul 2281  df-pw 2402  df-sn 2412  df-pr 2413  df-op 2416  df-br 2620  df-opab 2667  df-xp 3184  df-cnv 3186  df-dm 3188  df-rn 3189  df-res 3190  df-ima 3191

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