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Theorem elpmg 8412
Description: The predicate "is a partial function." (Contributed by Mario Carneiro, 14-Nov-2013.)
Assertion
Ref Expression
elpmg ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ (𝐴pm 𝐵) ↔ (Fun 𝐶𝐶 ⊆ (𝐵 × 𝐴))))

Proof of Theorem elpmg
Dummy variable 𝑔 is distinct from all other variables.
StepHypRef Expression
1 pmvalg 8407 . . . . 5 ((𝐴𝑉𝐵𝑊) → (𝐴pm 𝐵) = {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔})
21eleq2d 2903 . . . 4 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ (𝐴pm 𝐵) ↔ 𝐶 ∈ {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔}))
3 funeq 6372 . . . . 5 (𝑔 = 𝐶 → (Fun 𝑔 ↔ Fun 𝐶))
43elrab 3684 . . . 4 (𝐶 ∈ {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔} ↔ (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ∧ Fun 𝐶))
52, 4syl6bb 288 . . 3 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ (𝐴pm 𝐵) ↔ (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ∧ Fun 𝐶)))
65biancomd 464 . 2 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ (𝐴pm 𝐵) ↔ (Fun 𝐶𝐶 ∈ 𝒫 (𝐵 × 𝐴))))
7 elex 3518 . . . . 5 (𝐶 ∈ 𝒫 (𝐵 × 𝐴) → 𝐶 ∈ V)
87a1i 11 . . . 4 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) → 𝐶 ∈ V))
9 xpexg 7462 . . . . . 6 ((𝐵𝑊𝐴𝑉) → (𝐵 × 𝐴) ∈ V)
109ancoms 459 . . . . 5 ((𝐴𝑉𝐵𝑊) → (𝐵 × 𝐴) ∈ V)
11 ssexg 5224 . . . . . 6 ((𝐶 ⊆ (𝐵 × 𝐴) ∧ (𝐵 × 𝐴) ∈ V) → 𝐶 ∈ V)
1211expcom 414 . . . . 5 ((𝐵 × 𝐴) ∈ V → (𝐶 ⊆ (𝐵 × 𝐴) → 𝐶 ∈ V))
1310, 12syl 17 . . . 4 ((𝐴𝑉𝐵𝑊) → (𝐶 ⊆ (𝐵 × 𝐴) → 𝐶 ∈ V))
14 elpwg 4548 . . . . 5 (𝐶 ∈ V → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴)))
1514a1i 11 . . . 4 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ V → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴))))
168, 13, 15pm5.21ndd 381 . . 3 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴)))
1716anbi2d 628 . 2 ((𝐴𝑉𝐵𝑊) → ((Fun 𝐶𝐶 ∈ 𝒫 (𝐵 × 𝐴)) ↔ (Fun 𝐶𝐶 ⊆ (𝐵 × 𝐴))))
186, 17bitrd 280 1 ((𝐴𝑉𝐵𝑊) → (𝐶 ∈ (𝐴pm 𝐵) ↔ (Fun 𝐶𝐶 ⊆ (𝐵 × 𝐴))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396  wcel 2107  {crab 3147  Vcvv 3500  wss 3940  𝒫 cpw 4542   × cxp 5552  Fun wfun 6346  (class class class)co 7148  pm cpm 8397
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1789  ax-4 1803  ax-5 1904  ax-6 1963  ax-7 2008  ax-8 2109  ax-9 2117  ax-10 2138  ax-11 2153  ax-12 2169  ax-ext 2798  ax-sep 5200  ax-nul 5207  ax-pow 5263  ax-pr 5326  ax-un 7451
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 844  df-3an 1083  df-tru 1533  df-ex 1774  df-nf 1778  df-sb 2063  df-mo 2620  df-eu 2652  df-clab 2805  df-cleq 2819  df-clel 2898  df-nfc 2968  df-ral 3148  df-rex 3149  df-rab 3152  df-v 3502  df-sbc 3777  df-dif 3943  df-un 3945  df-in 3947  df-ss 3956  df-nul 4296  df-if 4471  df-pw 4544  df-sn 4565  df-pr 4567  df-op 4571  df-uni 4838  df-br 5064  df-opab 5126  df-id 5459  df-xp 5560  df-rel 5561  df-cnv 5562  df-co 5563  df-dm 5564  df-iota 6312  df-fun 6354  df-fv 6360  df-ov 7151  df-oprab 7152  df-mpo 7153  df-pm 8399
This theorem is referenced by:  elpm2g  8413  pmss12g  8423  elpm  8427  pmsspw  8431  lmfss  21820  lmmbr2  23777  iscau2  23795  caussi  23815  causs  23816
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