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Theorem xppreima 29750
Description: The preimage of a Cartesian product is the intersection of the preimages of each component function. (Contributed by Thierry Arnoux, 6-Jun-2017.)
Assertion
Ref Expression
xppreima ((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) → (𝐹 “ (𝑌 × 𝑍)) = (((1st𝐹) “ 𝑌) ∩ ((2nd𝐹) “ 𝑍)))

Proof of Theorem xppreima
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 funfn 6071 . . . . 5 (Fun 𝐹𝐹 Fn dom 𝐹)
2 fncnvima2 6494 . . . . 5 (𝐹 Fn dom 𝐹 → (𝐹 “ (𝑌 × 𝑍)) = {𝑥 ∈ dom 𝐹 ∣ (𝐹𝑥) ∈ (𝑌 × 𝑍)})
31, 2sylbi 207 . . . 4 (Fun 𝐹 → (𝐹 “ (𝑌 × 𝑍)) = {𝑥 ∈ dom 𝐹 ∣ (𝐹𝑥) ∈ (𝑌 × 𝑍)})
43adantr 472 . . 3 ((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) → (𝐹 “ (𝑌 × 𝑍)) = {𝑥 ∈ dom 𝐹 ∣ (𝐹𝑥) ∈ (𝑌 × 𝑍)})
5 fvco 6428 . . . . . . . . . 10 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((1st𝐹)‘𝑥) = (1st ‘(𝐹𝑥)))
6 fvco 6428 . . . . . . . . . 10 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((2nd𝐹)‘𝑥) = (2nd ‘(𝐹𝑥)))
75, 6opeq12d 4553 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ = ⟨(1st ‘(𝐹𝑥)), (2nd ‘(𝐹𝑥))⟩)
87eqeq2d 2762 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ ↔ (𝐹𝑥) = ⟨(1st ‘(𝐹𝑥)), (2nd ‘(𝐹𝑥))⟩))
95eleq1d 2816 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (((1st𝐹)‘𝑥) ∈ 𝑌 ↔ (1st ‘(𝐹𝑥)) ∈ 𝑌))
106eleq1d 2816 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (((2nd𝐹)‘𝑥) ∈ 𝑍 ↔ (2nd ‘(𝐹𝑥)) ∈ 𝑍))
119, 10anbi12d 749 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍) ↔ ((1st ‘(𝐹𝑥)) ∈ 𝑌 ∧ (2nd ‘(𝐹𝑥)) ∈ 𝑍)))
128, 11anbi12d 749 . . . . . . 7 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (((𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ ∧ (((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍)) ↔ ((𝐹𝑥) = ⟨(1st ‘(𝐹𝑥)), (2nd ‘(𝐹𝑥))⟩ ∧ ((1st ‘(𝐹𝑥)) ∈ 𝑌 ∧ (2nd ‘(𝐹𝑥)) ∈ 𝑍))))
13 elxp6 7359 . . . . . . 7 ((𝐹𝑥) ∈ (𝑌 × 𝑍) ↔ ((𝐹𝑥) = ⟨(1st ‘(𝐹𝑥)), (2nd ‘(𝐹𝑥))⟩ ∧ ((1st ‘(𝐹𝑥)) ∈ 𝑌 ∧ (2nd ‘(𝐹𝑥)) ∈ 𝑍)))
1412, 13syl6rbbr 279 . . . . . 6 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((𝐹𝑥) ∈ (𝑌 × 𝑍) ↔ ((𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ ∧ (((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍))))
1514adantlr 753 . . . . 5 (((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) ∧ 𝑥 ∈ dom 𝐹) → ((𝐹𝑥) ∈ (𝑌 × 𝑍) ↔ ((𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ ∧ (((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍))))
16 opfv 29749 . . . . . 6 (((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) ∧ 𝑥 ∈ dom 𝐹) → (𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩)
1716biantrurd 530 . . . . 5 (((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) ∧ 𝑥 ∈ dom 𝐹) → ((((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍) ↔ ((𝐹𝑥) = ⟨((1st𝐹)‘𝑥), ((2nd𝐹)‘𝑥)⟩ ∧ (((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍))))
18 fo1st 7345 . . . . . . . . . . 11 1st :V–onto→V
19 fofun 6269 . . . . . . . . . . 11 (1st :V–onto→V → Fun 1st )
2018, 19ax-mp 5 . . . . . . . . . 10 Fun 1st
21 funco 6081 . . . . . . . . . 10 ((Fun 1st ∧ Fun 𝐹) → Fun (1st𝐹))
2220, 21mpan 708 . . . . . . . . 9 (Fun 𝐹 → Fun (1st𝐹))
2322adantr 472 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → Fun (1st𝐹))
24 ssv 3758 . . . . . . . . . . . 12 (𝐹 “ dom 𝐹) ⊆ V
25 fof 6268 . . . . . . . . . . . . 13 (1st :V–onto→V → 1st :V⟶V)
26 fdm 6204 . . . . . . . . . . . . 13 (1st :V⟶V → dom 1st = V)
2718, 25, 26mp2b 10 . . . . . . . . . . . 12 dom 1st = V
2824, 27sseqtr4i 3771 . . . . . . . . . . 11 (𝐹 “ dom 𝐹) ⊆ dom 1st
29 ssid 3757 . . . . . . . . . . . 12 dom 𝐹 ⊆ dom 𝐹
30 funimass3 6488 . . . . . . . . . . . 12 ((Fun 𝐹 ∧ dom 𝐹 ⊆ dom 𝐹) → ((𝐹 “ dom 𝐹) ⊆ dom 1st ↔ dom 𝐹 ⊆ (𝐹 “ dom 1st )))
3129, 30mpan2 709 . . . . . . . . . . 11 (Fun 𝐹 → ((𝐹 “ dom 𝐹) ⊆ dom 1st ↔ dom 𝐹 ⊆ (𝐹 “ dom 1st )))
3228, 31mpbii 223 . . . . . . . . . 10 (Fun 𝐹 → dom 𝐹 ⊆ (𝐹 “ dom 1st ))
3332sselda 3736 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → 𝑥 ∈ (𝐹 “ dom 1st ))
34 dmco 5796 . . . . . . . . 9 dom (1st𝐹) = (𝐹 “ dom 1st )
3533, 34syl6eleqr 2842 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → 𝑥 ∈ dom (1st𝐹))
36 fvimacnv 6487 . . . . . . . 8 ((Fun (1st𝐹) ∧ 𝑥 ∈ dom (1st𝐹)) → (((1st𝐹)‘𝑥) ∈ 𝑌𝑥 ∈ ((1st𝐹) “ 𝑌)))
3723, 35, 36syl2anc 696 . . . . . . 7 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (((1st𝐹)‘𝑥) ∈ 𝑌𝑥 ∈ ((1st𝐹) “ 𝑌)))
38 fo2nd 7346 . . . . . . . . . . 11 2nd :V–onto→V
39 fofun 6269 . . . . . . . . . . 11 (2nd :V–onto→V → Fun 2nd )
4038, 39ax-mp 5 . . . . . . . . . 10 Fun 2nd
41 funco 6081 . . . . . . . . . 10 ((Fun 2nd ∧ Fun 𝐹) → Fun (2nd𝐹))
4240, 41mpan 708 . . . . . . . . 9 (Fun 𝐹 → Fun (2nd𝐹))
4342adantr 472 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → Fun (2nd𝐹))
44 fof 6268 . . . . . . . . . . . . 13 (2nd :V–onto→V → 2nd :V⟶V)
45 fdm 6204 . . . . . . . . . . . . 13 (2nd :V⟶V → dom 2nd = V)
4638, 44, 45mp2b 10 . . . . . . . . . . . 12 dom 2nd = V
4724, 46sseqtr4i 3771 . . . . . . . . . . 11 (𝐹 “ dom 𝐹) ⊆ dom 2nd
48 funimass3 6488 . . . . . . . . . . . 12 ((Fun 𝐹 ∧ dom 𝐹 ⊆ dom 𝐹) → ((𝐹 “ dom 𝐹) ⊆ dom 2nd ↔ dom 𝐹 ⊆ (𝐹 “ dom 2nd )))
4929, 48mpan2 709 . . . . . . . . . . 11 (Fun 𝐹 → ((𝐹 “ dom 𝐹) ⊆ dom 2nd ↔ dom 𝐹 ⊆ (𝐹 “ dom 2nd )))
5047, 49mpbii 223 . . . . . . . . . 10 (Fun 𝐹 → dom 𝐹 ⊆ (𝐹 “ dom 2nd ))
5150sselda 3736 . . . . . . . . 9 ((Fun 𝐹𝑥 ∈ dom 𝐹) → 𝑥 ∈ (𝐹 “ dom 2nd ))
52 dmco 5796 . . . . . . . . 9 dom (2nd𝐹) = (𝐹 “ dom 2nd )
5351, 52syl6eleqr 2842 . . . . . . . 8 ((Fun 𝐹𝑥 ∈ dom 𝐹) → 𝑥 ∈ dom (2nd𝐹))
54 fvimacnv 6487 . . . . . . . 8 ((Fun (2nd𝐹) ∧ 𝑥 ∈ dom (2nd𝐹)) → (((2nd𝐹)‘𝑥) ∈ 𝑍𝑥 ∈ ((2nd𝐹) “ 𝑍)))
5543, 53, 54syl2anc 696 . . . . . . 7 ((Fun 𝐹𝑥 ∈ dom 𝐹) → (((2nd𝐹)‘𝑥) ∈ 𝑍𝑥 ∈ ((2nd𝐹) “ 𝑍)))
5637, 55anbi12d 749 . . . . . 6 ((Fun 𝐹𝑥 ∈ dom 𝐹) → ((((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍) ↔ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))))
5756adantlr 753 . . . . 5 (((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) ∧ 𝑥 ∈ dom 𝐹) → ((((1st𝐹)‘𝑥) ∈ 𝑌 ∧ ((2nd𝐹)‘𝑥) ∈ 𝑍) ↔ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))))
5815, 17, 573bitr2d 296 . . . 4 (((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) ∧ 𝑥 ∈ dom 𝐹) → ((𝐹𝑥) ∈ (𝑌 × 𝑍) ↔ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))))
5958rabbidva 3320 . . 3 ((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) → {𝑥 ∈ dom 𝐹 ∣ (𝐹𝑥) ∈ (𝑌 × 𝑍)} = {𝑥 ∈ dom 𝐹 ∣ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))})
604, 59eqtrd 2786 . 2 ((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) → (𝐹 “ (𝑌 × 𝑍)) = {𝑥 ∈ dom 𝐹 ∣ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))})
61 dfin5 3715 . . . 4 (dom 𝐹 ∩ ((1st𝐹) “ 𝑌)) = {𝑥 ∈ dom 𝐹𝑥 ∈ ((1st𝐹) “ 𝑌)}
62 dfin5 3715 . . . 4 (dom 𝐹 ∩ ((2nd𝐹) “ 𝑍)) = {𝑥 ∈ dom 𝐹𝑥 ∈ ((2nd𝐹) “ 𝑍)}
6361, 62ineq12i 3947 . . 3 ((dom 𝐹 ∩ ((1st𝐹) “ 𝑌)) ∩ (dom 𝐹 ∩ ((2nd𝐹) “ 𝑍))) = ({𝑥 ∈ dom 𝐹𝑥 ∈ ((1st𝐹) “ 𝑌)} ∩ {𝑥 ∈ dom 𝐹𝑥 ∈ ((2nd𝐹) “ 𝑍)})
64 cnvimass 5635 . . . . . 6 ((1st𝐹) “ 𝑌) ⊆ dom (1st𝐹)
65 dmcoss 5532 . . . . . 6 dom (1st𝐹) ⊆ dom 𝐹
6664, 65sstri 3745 . . . . 5 ((1st𝐹) “ 𝑌) ⊆ dom 𝐹
67 sseqin2 3952 . . . . 5 (((1st𝐹) “ 𝑌) ⊆ dom 𝐹 ↔ (dom 𝐹 ∩ ((1st𝐹) “ 𝑌)) = ((1st𝐹) “ 𝑌))
6866, 67mpbi 220 . . . 4 (dom 𝐹 ∩ ((1st𝐹) “ 𝑌)) = ((1st𝐹) “ 𝑌)
69 cnvimass 5635 . . . . . 6 ((2nd𝐹) “ 𝑍) ⊆ dom (2nd𝐹)
70 dmcoss 5532 . . . . . 6 dom (2nd𝐹) ⊆ dom 𝐹
7169, 70sstri 3745 . . . . 5 ((2nd𝐹) “ 𝑍) ⊆ dom 𝐹
72 sseqin2 3952 . . . . 5 (((2nd𝐹) “ 𝑍) ⊆ dom 𝐹 ↔ (dom 𝐹 ∩ ((2nd𝐹) “ 𝑍)) = ((2nd𝐹) “ 𝑍))
7371, 72mpbi 220 . . . 4 (dom 𝐹 ∩ ((2nd𝐹) “ 𝑍)) = ((2nd𝐹) “ 𝑍)
7468, 73ineq12i 3947 . . 3 ((dom 𝐹 ∩ ((1st𝐹) “ 𝑌)) ∩ (dom 𝐹 ∩ ((2nd𝐹) “ 𝑍))) = (((1st𝐹) “ 𝑌) ∩ ((2nd𝐹) “ 𝑍))
75 inrab 4034 . . 3 ({𝑥 ∈ dom 𝐹𝑥 ∈ ((1st𝐹) “ 𝑌)} ∩ {𝑥 ∈ dom 𝐹𝑥 ∈ ((2nd𝐹) “ 𝑍)}) = {𝑥 ∈ dom 𝐹 ∣ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))}
7663, 74, 753eqtr3ri 2783 . 2 {𝑥 ∈ dom 𝐹 ∣ (𝑥 ∈ ((1st𝐹) “ 𝑌) ∧ 𝑥 ∈ ((2nd𝐹) “ 𝑍))} = (((1st𝐹) “ 𝑌) ∩ ((2nd𝐹) “ 𝑍))
7760, 76syl6eq 2802 1 ((Fun 𝐹 ∧ ran 𝐹 ⊆ (V × V)) → (𝐹 “ (𝑌 × 𝑍)) = (((1st𝐹) “ 𝑌) ∩ ((2nd𝐹) “ 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383   = wceq 1624  wcel 2131  {crab 3046  Vcvv 3332  cin 3706  wss 3707  cop 4319   × cxp 5256  ccnv 5257  dom cdm 5258  ran crn 5259  cima 5261  ccom 5262  Fun wfun 6035   Fn wfn 6036  wf 6037  ontowfo 6039  cfv 6041  1st c1st 7323  2nd c2nd 7324
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1863  ax-4 1878  ax-5 1980  ax-6 2046  ax-7 2082  ax-8 2133  ax-9 2140  ax-10 2160  ax-11 2175  ax-12 2188  ax-13 2383  ax-ext 2732  ax-sep 4925  ax-nul 4933  ax-pow 4984  ax-pr 5047  ax-un 7106
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1074  df-tru 1627  df-ex 1846  df-nf 1851  df-sb 2039  df-eu 2603  df-mo 2604  df-clab 2739  df-cleq 2745  df-clel 2748  df-nfc 2883  df-ne 2925  df-ral 3047  df-rex 3048  df-rab 3051  df-v 3334  df-sbc 3569  df-dif 3710  df-un 3712  df-in 3714  df-ss 3721  df-nul 4051  df-if 4223  df-sn 4314  df-pr 4316  df-op 4320  df-uni 4581  df-br 4797  df-opab 4857  df-mpt 4874  df-id 5166  df-xp 5264  df-rel 5265  df-cnv 5266  df-co 5267  df-dm 5268  df-rn 5269  df-res 5270  df-ima 5271  df-iota 6004  df-fun 6043  df-fn 6044  df-f 6045  df-fo 6047  df-fv 6049  df-1st 7325  df-2nd 7326
This theorem is referenced by:  xppreima2  29751
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