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Theorem ixpconstg 8905
Description: Infinite Cartesian product of a constant 𝐵. (Contributed by Mario Carneiro, 11-Jan-2015.)
Assertion
Ref Expression
ixpconstg ((𝐴𝑉𝐵𝑊) → X𝑥𝐴 𝐵 = (𝐵m 𝐴))
Distinct variable groups:   𝑥,𝐴   𝑥,𝐵
Allowed substitution hints:   𝑉(𝑥)   𝑊(𝑥)

Proof of Theorem ixpconstg
Dummy variable 𝑓 is distinct from all other variables.
StepHypRef Expression
1 vex 3459 . . . . 5 𝑓 ∈ V
21elixpconst 8904 . . . 4 (𝑓X𝑥𝐴 𝐵𝑓:𝐴𝐵)
32eqabi 2898 . . 3 X𝑥𝐴 𝐵 = {𝑓𝑓:𝐴𝐵}
4 mapvalg 8834 . . 3 ((𝐵𝑊𝐴𝑉) → (𝐵m 𝐴) = {𝑓𝑓:𝐴𝐵})
53, 4eqtr4id 2817 . 2 ((𝐵𝑊𝐴𝑉) → X𝑥𝐴 𝐵 = (𝐵m 𝐴))
65ancoms 463 1 ((𝐴𝑉𝐵𝑊) → X𝑥𝐴 𝐵 = (𝐵m 𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  {cab 2741  wf 6534  (class class class)co 7412  m cmap 8825  Xcixp 8896
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-sbc 3746  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546  df-ov 7415  df-oprab 7416  df-mpo 7417  df-map 8827  df-ixp 8897
This theorem is referenced by:  ixpconst  8906  mapsnf1o  8938  prdshom  17521  pwsbas  17541  frlmip  21909  pttoponconst  23735  xkoptsub  23792  xkopt  23793  tmdgsum2  24234  rrxip  25530  ovnlecvr2  47307  naryfvalixp  49392
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