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Theorem imaundir 5424
Description: The image of a union. (Contributed by Jeff Hoffman, 17-Feb-2008.)
Assertion
Ref Expression
imaundir

Proof of Theorem imaundir
StepHypRef Expression
1 df-ima 5017 . . 3
2 resundir 5293 . . . 4
32rneqi 5234 . . 3
4 rnun 5419 . . 3
51, 3, 43eqtri 2490 . 2
6 df-ima 5017 . . 3
7 df-ima 5017 . . 3
86, 7uneq12i 3655 . 2
95, 8eqtr4i 2489 1
Colors of variables: wff setvar class
Syntax hints:  =wceq 1395  u.cun 3473  rancrn 5005  |`cres 5006  "cima 5007
This theorem is referenced by:  fvun  5943  suppun  6939  fsuppun  7868  fpwwe2lem13  9041  gsumzaddlemOLD  16936  funsnfsupOLD  18256  ustuqtop1  20744  mbfres2  22052  imadifxp  27458  eulerpartlemt  28310  aacllem  33216  bj-projun  34552  unhe1  37808
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-6 1747  ax-7 1790  ax-10 1837  ax-11 1842  ax-12 1854  ax-13 1999  ax-ext 2435
This theorem depends on definitions:  df-bi 185  df-or 370  df-an 371  df-3an 975  df-tru 1398  df-ex 1613  df-nf 1617  df-sb 1740  df-clab 2443  df-cleq 2449  df-clel 2452  df-nfc 2607  df-rab 2816  df-v 3111  df-dif 3478  df-un 3480  df-in 3482  df-ss 3489  df-nul 3785  df-if 3942  df-sn 4030  df-pr 4032  df-op 4036  df-br 4453  df-opab 4511  df-cnv 5012  df-dm 5014  df-rn 5015  df-res 5016  df-ima 5017
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