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Theorem fncnv 6000
Description: Single-rootedness (see funcnv 5996) of a class cut down by a Cartesian product. (Contributed by NM, 5-Mar-2007.)
Assertion
Ref Expression
fncnv ((𝑅 ∩ (𝐴 × 𝐵)) Fn 𝐵 ↔ ∀𝑦𝐵 ∃!𝑥𝐴 𝑥𝑅𝑦)
Distinct variable groups:   𝑥,𝑦,𝐴   𝑥,𝐵,𝑦   𝑥,𝑅,𝑦

Proof of Theorem fncnv
StepHypRef Expression
1 df-fn 5929 . 2 ((𝑅 ∩ (𝐴 × 𝐵)) Fn 𝐵 ↔ (Fun (𝑅 ∩ (𝐴 × 𝐵)) ∧ dom (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵))
2 df-rn 5154 . . . 4 ran (𝑅 ∩ (𝐴 × 𝐵)) = dom (𝑅 ∩ (𝐴 × 𝐵))
32eqeq1i 2656 . . 3 (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ↔ dom (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵)
43anbi2i 730 . 2 ((Fun (𝑅 ∩ (𝐴 × 𝐵)) ∧ ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵) ↔ (Fun (𝑅 ∩ (𝐴 × 𝐵)) ∧ dom (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵))
5 rninxp 5608 . . . . 5 (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ↔ ∀𝑦𝐵𝑥𝐴 𝑥𝑅𝑦)
65anbi1i 731 . . . 4 ((ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ∧ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦) ↔ (∀𝑦𝐵𝑥𝐴 𝑥𝑅𝑦 ∧ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦))
7 funcnv 5996 . . . . . 6 (Fun (𝑅 ∩ (𝐴 × 𝐵)) ↔ ∀𝑦 ∈ ran (𝑅 ∩ (𝐴 × 𝐵))∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦)
8 raleq 3168 . . . . . . 7 (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 → (∀𝑦 ∈ ran (𝑅 ∩ (𝐴 × 𝐵))∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ ∀𝑦𝐵 ∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦))
9 biimt 349 . . . . . . . . 9 (𝑦𝐵 → (∃*𝑥𝐴 𝑥𝑅𝑦 ↔ (𝑦𝐵 → ∃*𝑥𝐴 𝑥𝑅𝑦)))
10 moanimv 2560 . . . . . . . . . 10 (∃*𝑥(𝑦𝐵 ∧ (𝑥𝐴𝑥𝑅𝑦)) ↔ (𝑦𝐵 → ∃*𝑥(𝑥𝐴𝑥𝑅𝑦)))
11 brinxp2 5214 . . . . . . . . . . . 12 (𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ (𝑥𝐴𝑦𝐵𝑥𝑅𝑦))
12 3anan12 1069 . . . . . . . . . . . 12 ((𝑥𝐴𝑦𝐵𝑥𝑅𝑦) ↔ (𝑦𝐵 ∧ (𝑥𝐴𝑥𝑅𝑦)))
1311, 12bitri 264 . . . . . . . . . . 11 (𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ (𝑦𝐵 ∧ (𝑥𝐴𝑥𝑅𝑦)))
1413mobii 2521 . . . . . . . . . 10 (∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ ∃*𝑥(𝑦𝐵 ∧ (𝑥𝐴𝑥𝑅𝑦)))
15 df-rmo 2949 . . . . . . . . . . 11 (∃*𝑥𝐴 𝑥𝑅𝑦 ↔ ∃*𝑥(𝑥𝐴𝑥𝑅𝑦))
1615imbi2i 325 . . . . . . . . . 10 ((𝑦𝐵 → ∃*𝑥𝐴 𝑥𝑅𝑦) ↔ (𝑦𝐵 → ∃*𝑥(𝑥𝐴𝑥𝑅𝑦)))
1710, 14, 163bitr4i 292 . . . . . . . . 9 (∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ (𝑦𝐵 → ∃*𝑥𝐴 𝑥𝑅𝑦))
189, 17syl6rbbr 279 . . . . . . . 8 (𝑦𝐵 → (∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ ∃*𝑥𝐴 𝑥𝑅𝑦))
1918ralbiia 3008 . . . . . . 7 (∀𝑦𝐵 ∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦)
208, 19syl6bb 276 . . . . . 6 (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 → (∀𝑦 ∈ ran (𝑅 ∩ (𝐴 × 𝐵))∃*𝑥 𝑥(𝑅 ∩ (𝐴 × 𝐵))𝑦 ↔ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦))
217, 20syl5bb 272 . . . . 5 (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 → (Fun (𝑅 ∩ (𝐴 × 𝐵)) ↔ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦))
2221pm5.32i 670 . . . 4 ((ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ∧ Fun (𝑅 ∩ (𝐴 × 𝐵))) ↔ (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ∧ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦))
23 r19.26 3093 . . . 4 (∀𝑦𝐵 (∃𝑥𝐴 𝑥𝑅𝑦 ∧ ∃*𝑥𝐴 𝑥𝑅𝑦) ↔ (∀𝑦𝐵𝑥𝐴 𝑥𝑅𝑦 ∧ ∀𝑦𝐵 ∃*𝑥𝐴 𝑥𝑅𝑦))
246, 22, 233bitr4i 292 . . 3 ((ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ∧ Fun (𝑅 ∩ (𝐴 × 𝐵))) ↔ ∀𝑦𝐵 (∃𝑥𝐴 𝑥𝑅𝑦 ∧ ∃*𝑥𝐴 𝑥𝑅𝑦))
25 ancom 465 . . 3 ((Fun (𝑅 ∩ (𝐴 × 𝐵)) ∧ ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵) ↔ (ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵 ∧ Fun (𝑅 ∩ (𝐴 × 𝐵))))
26 reu5 3189 . . . 4 (∃!𝑥𝐴 𝑥𝑅𝑦 ↔ (∃𝑥𝐴 𝑥𝑅𝑦 ∧ ∃*𝑥𝐴 𝑥𝑅𝑦))
2726ralbii 3009 . . 3 (∀𝑦𝐵 ∃!𝑥𝐴 𝑥𝑅𝑦 ↔ ∀𝑦𝐵 (∃𝑥𝐴 𝑥𝑅𝑦 ∧ ∃*𝑥𝐴 𝑥𝑅𝑦))
2824, 25, 273bitr4i 292 . 2 ((Fun (𝑅 ∩ (𝐴 × 𝐵)) ∧ ran (𝑅 ∩ (𝐴 × 𝐵)) = 𝐵) ↔ ∀𝑦𝐵 ∃!𝑥𝐴 𝑥𝑅𝑦)
291, 4, 283bitr2i 288 1 ((𝑅 ∩ (𝐴 × 𝐵)) Fn 𝐵 ↔ ∀𝑦𝐵 ∃!𝑥𝐴 𝑥𝑅𝑦)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 383  w3a 1054   = wceq 1523  wcel 2030  ∃*wmo 2499  wral 2941  wrex 2942  ∃!wreu 2943  ∃*wrmo 2944  cin 3606   class class class wbr 4685   × cxp 5141  ccnv 5142  dom cdm 5143  ran crn 5144  Fun wfun 5920   Fn wfn 5921
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-sep 4814  ax-nul 4822  ax-pr 4936
This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-nul 3949  df-if 4120  df-sn 4211  df-pr 4213  df-op 4217  df-br 4686  df-opab 4746  df-id 5053  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-fun 5928  df-fn 5929
This theorem is referenced by: (None)
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