Theorem fnimapr 5375

Description: The image of a pair under a function. (Contributed by Jeff Madsen, 6-Jan-2011.)

Assertion

Ref	Expression
fnimapr	⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → (F “ {B, C}) = {(F ‘B), (F ‘C)})

Proof of Theorem fnimapr

Step	Hyp	Ref	Expression
1		fnsnfv 5374	. . . . 5 ⊢ ((F Fn A ∧ B ∈ A) → {(F ‘B)} = (F “ {B}))
2	1	3adant3 975	. . . 4 ⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → {(F ‘B)} = (F “ {B}))
3		fnsnfv 5374	. . . . 5 ⊢ ((F Fn A ∧ C ∈ A) → {(F ‘C)} = (F “ {C}))
4	3	3adant2 974	. . . 4 ⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → {(F ‘C)} = (F “ {C}))
5	2, 4	uneq12d 3420	. . 3 ⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → ({(F ‘B)} ∪ {(F ‘C)}) = ((F “ {B}) ∪ (F “ {C})))
6	5	eqcomd 2358	. 2 ⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → ((F “ {B}) ∪ (F “ {C})) = ({(F ‘B)} ∪ {(F ‘C)}))
7		df-pr 3743	. . . 4 ⊢ {B, C} = ({B} ∪ {C})
8	7	imaeq2i 4941	. . 3 ⊢ (F “ {B, C}) = (F “ ({B} ∪ {C}))
9		imaundi 5040	. . 3 ⊢ (F “ ({B} ∪ {C})) = ((F “ {B}) ∪ (F “ {C}))
10	8, 9	eqtri 2373	. 2 ⊢ (F “ {B, C}) = ((F “ {B}) ∪ (F “ {C}))
11		df-pr 3743	. 2 ⊢ {(F ‘B), (F ‘C)} = ({(F ‘B)} ∪ {(F ‘C)})
12	6, 10, 11	3eqtr4g 2410	1 ⊢ ((F Fn A ∧ B ∈ A ∧ C ∈ A) → (F “ {B, C}) = {(F ‘B), (F ‘C)})

Syntax hints:   → wi 4   ∧ w3a 934   = wceq 1642   ∈ wcel 1710   ∪ cun 3208  {csn 3738  {cpr 3739   “ cima 4723   Fn wfn 4777   ‘cfv 4782

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 4079  ax-xp 4080  ax-cnv 4081  ax-1c 4082  ax-sset 4083  ax-si 4084  ax-ins2 4085  ax-ins3 4086  ax-typlower 4087  ax-sn 4088

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 2479  df-ne 2519  df-ral 2620  df-rex 2621  df-reu 2622  df-rmo 2623  df-rab 2624  df-v 2862  df-sbc 3048  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-symdif 3217  df-ss 3260  df-pss 3262  df-nul 3552  df-if 3664  df-pw 3725  df-sn 3742  df-pr 3743  df-uni 3893  df-int 3928  df-opk 4059  df-1c 4137  df-pw1 4138  df-uni1 4139  df-xpk 4186  df-cnvk 4187  df-ins2k 4188  df-ins3k 4189  df-imak 4190  df-cok 4191  df-p6 4192  df-sik 4193  df-ssetk 4194  df-imagek 4195  df-idk 4196  df-iota 4340  df-0c 4378  df-addc 4379  df-nnc 4380  df-fin 4381  df-lefin 4441  df-ltfin 4442  df-ncfin 4443  df-tfin 4444  df-evenfin 4445  df-oddfin 4446  df-sfin 4447  df-spfin 4448  df-phi 4566  df-op 4567  df-proj1 4568  df-proj2 4569  df-opab 4624  df-br 4641  df-co 4727  df-ima 4728  df-id 4768  df-xp 4785  df-cnv 4786  df-rn 4787  df-dm 4788  df-res 4789  df-fun 4790  df-fn 4791  df-fv 4796

This theorem is referenced by: (None)