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Theorem ixpssmap2g 7009
Description: An infinite Cartesian product is a subset of set exponentiation. This version of ixpssmapg 7010 avoids ax-coll 4246. (Contributed by Mario Carneiro, 16-Nov-2014.)
Assertion
Ref Expression
ixpssmap2g ( 𝑥𝐴 𝐵𝑉X𝑥𝐴 𝐵 ⊆ ( 𝑥𝐴 𝐵𝑚 𝐴))
Distinct variable group:   𝑥,𝐴
Allowed substitution hints:   𝐵(𝑥)   𝑉(𝑥)

Proof of Theorem ixpssmap2g
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 ixpf 7002 . . . . 5 (𝑓X𝑥𝐴 𝐵𝑓:𝐴 𝑥𝐴 𝐵)
21adantl 277 . . . 4 (( 𝑥𝐴 𝐵𝑉𝑓X𝑥𝐴 𝐵) → 𝑓:𝐴 𝑥𝐴 𝐵)
3 ixpfn 6986 . . . . . 6 (𝑓X𝑥𝐴 𝐵𝑓 Fn 𝐴)
4 fndm 5480 . . . . . . 7 (𝑓 Fn 𝐴 → dom 𝑓 = 𝐴)
5 vex 2824 . . . . . . . 8 𝑓 ∈ V
65dmex 5049 . . . . . . 7 dom 𝑓 ∈ V
74, 6eqeltrrdi 2330 . . . . . 6 (𝑓 Fn 𝐴𝐴 ∈ V)
83, 7syl 14 . . . . 5 (𝑓X𝑥𝐴 𝐵𝐴 ∈ V)
9 elmapg 6935 . . . . 5 (( 𝑥𝐴 𝐵𝑉𝐴 ∈ V) → (𝑓 ∈ ( 𝑥𝐴 𝐵𝑚 𝐴) ↔ 𝑓:𝐴 𝑥𝐴 𝐵))
108, 9sylan2 286 . . . 4 (( 𝑥𝐴 𝐵𝑉𝑓X𝑥𝐴 𝐵) → (𝑓 ∈ ( 𝑥𝐴 𝐵𝑚 𝐴) ↔ 𝑓:𝐴 𝑥𝐴 𝐵))
112, 10mpbird 167 . . 3 (( 𝑥𝐴 𝐵𝑉𝑓X𝑥𝐴 𝐵) → 𝑓 ∈ ( 𝑥𝐴 𝐵𝑚 𝐴))
1211ex 115 . 2 ( 𝑥𝐴 𝐵𝑉 → (𝑓X𝑥𝐴 𝐵𝑓 ∈ ( 𝑥𝐴 𝐵𝑚 𝐴)))
1312ssrdv 3254 1 ( 𝑥𝐴 𝐵𝑉X𝑥𝐴 𝐵 ⊆ ( 𝑥𝐴 𝐵𝑚 𝐴))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wa 104  wb 105  wcel 2209  Vcvv 2821  wss 3220   ciun 4012  dom cdm 4774   Fn wfn 5372  wf 5373  (class class class)co 6085  𝑚 cmap 6922  Xcixp 6980
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-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-iun 4014  df-br 4131  df-opab 4193  df-mpt 4194  df-id 4438  df-xp 4780  df-rel 4781  df-cnv 4782  df-co 4783  df-dm 4784  df-rn 4785  df-iota 5337  df-fun 5379  df-fn 5380  df-f 5381  df-fv 5385  df-ov 6088  df-oprab 6089  df-mpo 6090  df-map 6924  df-ixp 6981
This theorem is used by:  ixpssmapg  7010  prdsval  14175
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