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Theorem pmss12g 6956
Description: Subset relation for the set of partial functions. (Contributed by Mario Carneiro, 31-Dec-2013.)
Assertion
Ref Expression
pmss12g (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → (𝐴pm 𝐵) ⊆ (𝐶pm 𝐷))

Proof of Theorem pmss12g
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 xpss12 4882 . . . . . . 7 ((𝐵𝐷𝐴𝐶) → (𝐵 × 𝐴) ⊆ (𝐷 × 𝐶))
21ancoms 268 . . . . . 6 ((𝐴𝐶𝐵𝐷) → (𝐵 × 𝐴) ⊆ (𝐷 × 𝐶))
3 sstr 3256 . . . . . . 7 ((𝑓 ⊆ (𝐵 × 𝐴) ∧ (𝐵 × 𝐴) ⊆ (𝐷 × 𝐶)) → 𝑓 ⊆ (𝐷 × 𝐶))
43expcom 116 . . . . . 6 ((𝐵 × 𝐴) ⊆ (𝐷 × 𝐶) → (𝑓 ⊆ (𝐵 × 𝐴) → 𝑓 ⊆ (𝐷 × 𝐶)))
52, 4syl 14 . . . . 5 ((𝐴𝐶𝐵𝐷) → (𝑓 ⊆ (𝐵 × 𝐴) → 𝑓 ⊆ (𝐷 × 𝐶)))
65anim2d 337 . . . 4 ((𝐴𝐶𝐵𝐷) → ((Fun 𝑓𝑓 ⊆ (𝐵 × 𝐴)) → (Fun 𝑓𝑓 ⊆ (𝐷 × 𝐶))))
76adantr 276 . . 3 (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → ((Fun 𝑓𝑓 ⊆ (𝐵 × 𝐴)) → (Fun 𝑓𝑓 ⊆ (𝐷 × 𝐶))))
8 ssexg 4272 . . . . 5 ((𝐴𝐶𝐶𝑉) → 𝐴 ∈ V)
9 ssexg 4272 . . . . 5 ((𝐵𝐷𝐷𝑊) → 𝐵 ∈ V)
10 elpmg 6938 . . . . 5 ((𝐴 ∈ V ∧ 𝐵 ∈ V) → (𝑓 ∈ (𝐴pm 𝐵) ↔ (Fun 𝑓𝑓 ⊆ (𝐵 × 𝐴))))
118, 9, 10syl2an 289 . . . 4 (((𝐴𝐶𝐶𝑉) ∧ (𝐵𝐷𝐷𝑊)) → (𝑓 ∈ (𝐴pm 𝐵) ↔ (Fun 𝑓𝑓 ⊆ (𝐵 × 𝐴))))
1211an4s 596 . . 3 (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → (𝑓 ∈ (𝐴pm 𝐵) ↔ (Fun 𝑓𝑓 ⊆ (𝐵 × 𝐴))))
13 elpmg 6938 . . . 4 ((𝐶𝑉𝐷𝑊) → (𝑓 ∈ (𝐶pm 𝐷) ↔ (Fun 𝑓𝑓 ⊆ (𝐷 × 𝐶))))
1413adantl 277 . . 3 (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → (𝑓 ∈ (𝐶pm 𝐷) ↔ (Fun 𝑓𝑓 ⊆ (𝐷 × 𝐶))))
157, 12, 143imtr4d 203 . 2 (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → (𝑓 ∈ (𝐴pm 𝐵) → 𝑓 ∈ (𝐶pm 𝐷)))
1615ssrdv 3254 1 (((𝐴𝐶𝐵𝐷) ∧ (𝐶𝑉𝐷𝑊)) → (𝐴pm 𝐵) ⊆ (𝐶pm 𝐷))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wa 104  wb 105  wcel 2209  Vcvv 2821  wss 3220   × cxp 4772  Fun wfun 5371  (class class class)co 6085  pm cpm 6923
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4249  ax-pow 4311  ax-pr 4346  ax-un 4578  ax-setind 4684
This proof depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-ral 2533  df-rex 2534  df-rab 2537  df-v 2823  df-sbc 3052  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-pw 3690  df-sn 3715  df-pr 3716  df-op 3718  df-uni 3936  df-br 4131  df-opab 4193  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-iota 5337  df-fun 5379  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-pm 6925
This theorem is used by:  lmres  15351  dvidsslem  15796
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