Theorem elpmg 8422

Description: The predicate "is a partial function." (Contributed by Mario Carneiro, 14-Nov-2013.)

Assertion

Ref	Expression
elpmg	⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ (𝐴 ↑pm 𝐵) ↔ (Fun 𝐶 ∧ 𝐶 ⊆ (𝐵 × 𝐴))))

Proof of Theorem elpmg

Dummy variable 𝑔 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		pmvalg 8417	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐴 ↑pm 𝐵) = {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔})
2	1	eleq2d 2898	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ (𝐴 ↑pm 𝐵) ↔ 𝐶 ∈ {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔}))
3		funeq 6375	. . . . 5 ⊢ (𝑔 = 𝐶 → (Fun 𝑔 ↔ Fun 𝐶))
4	3	elrab 3680	. . . 4 ⊢ (𝐶 ∈ {𝑔 ∈ 𝒫 (𝐵 × 𝐴) ∣ Fun 𝑔} ↔ (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ∧ Fun 𝐶))
5	2, 4	syl6bb 289	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ (𝐴 ↑pm 𝐵) ↔ (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ∧ Fun 𝐶)))
6	5	biancomd 466	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ (𝐴 ↑pm 𝐵) ↔ (Fun 𝐶 ∧ 𝐶 ∈ 𝒫 (𝐵 × 𝐴))))
7		elex 3512	. . . . 5 ⊢ (𝐶 ∈ 𝒫 (𝐵 × 𝐴) → 𝐶 ∈ V)
8	7	a1i 11	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) → 𝐶 ∈ V))
9		xpexg 7473	. . . . . 6 ⊢ ((𝐵 ∈ 𝑊 ∧ 𝐴 ∈ 𝑉) → (𝐵 × 𝐴) ∈ V)
10	9	ancoms 461	. . . . 5 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐵 × 𝐴) ∈ V)
11		ssexg 5227	. . . . . 6 ⊢ ((𝐶 ⊆ (𝐵 × 𝐴) ∧ (𝐵 × 𝐴) ∈ V) → 𝐶 ∈ V)
12	11	expcom 416	. . . . 5 ⊢ ((𝐵 × 𝐴) ∈ V → (𝐶 ⊆ (𝐵 × 𝐴) → 𝐶 ∈ V))
13	10, 12	syl 17	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ⊆ (𝐵 × 𝐴) → 𝐶 ∈ V))
14		elpwg 4542	. . . . 5 ⊢ (𝐶 ∈ V → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴)))
15	14	a1i 11	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ V → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴))))
16	8, 13, 15	pm5.21ndd 383	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ 𝒫 (𝐵 × 𝐴) ↔ 𝐶 ⊆ (𝐵 × 𝐴)))
17	16	anbi2d 630	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ((Fun 𝐶 ∧ 𝐶 ∈ 𝒫 (𝐵 × 𝐴)) ↔ (Fun 𝐶 ∧ 𝐶 ⊆ (𝐵 × 𝐴))))
18	6, 17	bitrd 281	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (𝐶 ∈ (𝐴 ↑pm 𝐵) ↔ (Fun 𝐶 ∧ 𝐶 ⊆ (𝐵 × 𝐴))))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398   ∈ wcel 2114  {crab 3142  Vcvv 3494   ⊆ wss 3936  𝒫 cpw 4539   × cxp 5553  Fun wfun 6349  (class class class)co 7156   ↑_pm cpm 8407

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3773  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4839  df-br 5067  df-opab 5129  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-iota 6314  df-fun 6357  df-fv 6363  df-ov 7159  df-oprab 7160  df-mpo 7161  df-pm 8409

This theorem is referenced by:  elpm2g  8423  pmss12g  8433  elpm  8437  pmsspw  8441  lmfss  21904  lmmbr2  23862  iscau2  23880  caussi  23900  causs  23901