Theorem fnasrn 5418

Description: A function expressed as the range of another function. (Contributed by Mario Carneiro, 22-Jun-2013.)

Assertion

Ref	Expression
fnasrn	|- (F Fn A -> F = ran {<.x, y>. | (x e. A /\ y = <.x, (F` x)>.)})

Distinct variable groups:   x,y,A   x,F,y

Proof of Theorem fnasrn

Dummy variables w z are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		fndm 5183	. . . . . 6 |- (F Fn A -> dom F = A)
2		opeldm 4911	. . . . . . 7 |- (<.z, w>. e. F -> z e. dom F)
3		eleq2 2414	. . . . . . 7 |- (dom F = A -> (z e. dom F <-> z e. A))
4	2, 3	syl5ib 210	. . . . . 6 |- (dom F = A -> (<.z, w>. e. F -> z e. A))
5	1, 4	syl 15	. . . . 5 |- (F Fn A -> (<.z, w>. e. F -> z e. A))
6		eleq1 2413	. . . . . . . . 9 |- (x = z -> (x e. A <-> z e. A))
7	6	biimpcd 215	. . . . . . . 8 |- (x e. A -> (x = z -> z e. A))
8	7	adantrd 454	. . . . . . 7 |- (x e. A -> ((x = z /\ (F` x) = w) -> z e. A))
9	8	rexlimiv 2733	. . . . . 6 |- (E.x e. A (x = z /\ (F` x) = w) -> z e. A)
10	9	a1i 10	. . . . 5 |- (F Fn A -> (E.x e. A (x = z /\ (F` x) = w) -> z e. A))
11		fveq2 5329	. . . . . . . . . 10 |- (x = z -> (F` x) = (F` z))
12	11	eqeq1d 2361	. . . . . . . . 9 |- (x = z -> ((F` x) = w <-> (F` z) = w))
13	12	ceqsrexv 2973	. . . . . . . 8 |- (z e. A -> (E.x e. A (x = z /\ (F` x) = w) <-> (F` z) = w))
14	13	adantl 452	. . . . . . 7 |- ((F Fn A /\ z e. A) -> (E.x e. A (x = z /\ (F` x) = w) <-> (F` z) = w))
15		fnopfvb 5360	. . . . . . 7 |- ((F Fn A /\ z e. A) -> ((F` z) = w <-> <.z, w>. e. F))
16	14, 15	bitr2d 245	. . . . . 6 |- ((F Fn A /\ z e. A) -> (<.z, w>. e. F <-> E.x e. A (x = z /\ (F` x) = w)))
17	16	ex 423	. . . . 5 |- (F Fn A -> (z e. A -> (<.z, w>. e. F <-> E.x e. A (x = z /\ (F` x) = w))))
18	5, 10, 17	pm5.21ndd 343	. . . 4 |- (F Fn A -> (<.z, w>. e. F <-> E.x e. A (x = z /\ (F` x) = w)))
19		vex 2863	. . . . . 6 |- z e. _V
20		vex 2863	. . . . . 6 |- w e. _V
21	19, 20	opex 4589	. . . . 5 |- <.z, w>. e. _V
22		eqeq1 2359	. . . . . . 7 |- (y = <.z, w>. -> (y = <.x, (F` x)>. <-> <.z, w>. = <.x, (F` x)>.))
23		eqcom 2355	. . . . . . . 8 |- (<.z, w>. = <.x, (F` x)>. <-> <.x, (F` x)>. = <.z, w>.)
24		opth 4603	. . . . . . . 8 |- (<.x, (F` x)>. = <.z, w>. <-> (x = z /\ (F` x) = w))
25	23, 24	bitri 240	. . . . . . 7 |- (<.z, w>. = <.x, (F` x)>. <-> (x = z /\ (F` x) = w))
26	22, 25	syl6bb 252	. . . . . 6 |- (y = <.z, w>. -> (y = <.x, (F` x)>. <-> (x = z /\ (F` x) = w)))
27	26	rexbidv 2636	. . . . 5 |- (y = <.z, w>. -> (E.x e. A y = <.x, (F` x)>. <-> E.x e. A (x = z /\ (F` x) = w)))
28	21, 27	elab 2986	. . . 4 |- (<.z, w>. e. {y | E.x e. A y = <.x, (F` x)>.} <-> E.x e. A (x = z /\ (F` x) = w))
29	18, 28	syl6bbr 254	. . 3 |- (F Fn A -> (<.z, w>. e. F <-> <.z, w>. e. {y | E.x e. A y = <.x, (F` x)>.}))
30	29	eqrelrdv 4853	. 2 |- (F Fn A -> F = {y | E.x e. A y = <.x, (F` x)>.})
31		rnopab2 4969	. 2 |- ran {<.x, y>. | (x e. A /\ y = <.x, (F` x)>.)} = {y | E.x e. A y = <.x, (F` x)>.}
32	30, 31	syl6eqr 2403	1 |- (F Fn A -> F = ran {<.x, y>. | (x e. A /\ y = <.x, (F` x)>.)})

Syntax hints:   -> wi 4   <-> wb 176   /\ wa 358   = wceq 1642   e. wcel 1710  {cab 2339  E.wrex 2616  <.cop 4562  {copab 4623  dom cdm 4773  ran crn 4774   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-cnv 4786  df-rn 4787  df-dm 4788  df-fun 4790  df-fn 4791  df-fv 4796

This theorem is referenced by: (None)