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Theorem imaundi 5039
 Description: Distributive law for image over union. Theorem 35 of [Suppes] p. 65. (Contributed by set.mm contributors, 30-Sep-2002.)
Assertion
Ref Expression
imaundi (A “ (BC)) = ((AB) ∪ (AC))

Proof of Theorem imaundi
StepHypRef Expression
1 resundi 4981 . . . 4 (A (BC)) = ((A B) ∪ (A C))
21rneqi 4957 . . 3 ran (A (BC)) = ran ((A B) ∪ (A C))
3 rnun 5036 . . 3 ran ((A B) ∪ (A C)) = (ran (A B) ∪ ran (A C))
42, 3eqtri 2373 . 2 ran (A (BC)) = (ran (A B) ∪ ran (A C))
5 dfima3 4951 . 2 (A “ (BC)) = ran (A (BC))
6 dfima3 4951 . . 3 (AB) = ran (A B)
7 dfima3 4951 . . 3 (AC) = ran (A C)
86, 7uneq12i 3416 . 2 ((AB) ∪ (AC)) = (ran (A B) ∪ ran (A C))
94, 5, 83eqtr4i 2383 1 (A “ (BC)) = ((AB) ∪ (AC))
 Colors of variables: wff setvar class Syntax hints:   = wceq 1642   ∪ cun 3207   “ cima 4722  ran crn 4773   ↾ cres 4774 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-13 1712  ax-14 1714  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4078  ax-xp 4079  ax-cnv 4080  ax-1c 4081  ax-sset 4082  ax-si 4083  ax-ins2 4084  ax-ins3 4085  ax-typlower 4086  ax-sn 4087 This theorem depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3or 935  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-eu 2208  df-mo 2209  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2478  df-ne 2518  df-ral 2619  df-rex 2620  df-reu 2621  df-rmo 2622  df-rab 2623  df-v 2861  df-sbc 3047  df-nin 3211  df-compl 3212  df-in 3213  df-un 3214  df-dif 3215  df-symdif 3216  df-ss 3259  df-pss 3261  df-nul 3551  df-if 3663  df-pw 3724  df-sn 3741  df-pr 3742  df-uni 3892  df-int 3927  df-opk 4058  df-1c 4136  df-pw1 4137  df-uni1 4138  df-xpk 4185  df-cnvk 4186  df-ins2k 4187  df-ins3k 4188  df-imak 4189  df-cok 4190  df-p6 4191  df-sik 4192  df-ssetk 4193  df-imagek 4194  df-idk 4195  df-iota 4339  df-0c 4377  df-addc 4378  df-nnc 4379  df-fin 4380  df-lefin 4440  df-ltfin 4441  df-ncfin 4442  df-tfin 4443  df-evenfin 4444  df-oddfin 4445  df-sfin 4446  df-spfin 4447  df-phi 4565  df-op 4566  df-proj1 4567  df-proj2 4568  df-opab 4623  df-br 4640  df-ima 4727  df-xp 4784  df-cnv 4785  df-rn 4786  df-dm 4787  df-res 4788 This theorem is referenced by:  fnimapr  5374  ncdisjun  6136
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