Theorem pttoponconst 23621

Description: The base set for a product topology when all factors are the same. (Contributed by Mario Carneiro, 22-Aug-2015.)

Hypothesis

Ref	Expression
ptuniconst.2	⊢ 𝐽 = (∏t‘(𝐴 × {𝑅}))

Assertion

Ref	Expression
pttoponconst	⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘(𝑋 ↑m 𝐴)))

Proof of Theorem pttoponconst

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		id 22	. . . 4 ⊢ (𝑅 ∈ (TopOn‘𝑋) → 𝑅 ∈ (TopOn‘𝑋))
2	1	ralrimivw 3148	. . 3 ⊢ (𝑅 ∈ (TopOn‘𝑋) → ∀𝑥 ∈ 𝐴 𝑅 ∈ (TopOn‘𝑋))
3		ptuniconst.2	. . . . 5 ⊢ 𝐽 = (∏t‘(𝐴 × {𝑅}))
4		fconstmpt 5751	. . . . . 6 ⊢ (𝐴 × {𝑅}) = (𝑥 ∈ 𝐴 ↦ 𝑅)
5	4	fveq2i 6910	. . . . 5 ⊢ (∏t‘(𝐴 × {𝑅})) = (∏t‘(𝑥 ∈ 𝐴 ↦ 𝑅))
6	3, 5	eqtri 2763	. . . 4 ⊢ 𝐽 = (∏t‘(𝑥 ∈ 𝐴 ↦ 𝑅))
7	6	pttopon 23620	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘X𝑥 ∈ 𝐴 𝑋))
8	2, 7	sylan2 593	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘X𝑥 ∈ 𝐴 𝑋))
9		toponmax 22948	. . . 4 ⊢ (𝑅 ∈ (TopOn‘𝑋) → 𝑋 ∈ 𝑅)
10		ixpconstg 8945	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝑅) → X𝑥 ∈ 𝐴 𝑋 = (𝑋 ↑m 𝐴))
11	9, 10	sylan2 593	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → X𝑥 ∈ 𝐴 𝑋 = (𝑋 ↑m 𝐴))
12	11	fveq2d 6911	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → (TopOn‘X𝑥 ∈ 𝐴 𝑋) = (TopOn‘(𝑋 ↑m 𝐴)))
13	8, 12	eleqtrd 2841	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘(𝑋 ↑m 𝐴)))

Syntax hints:   → wi 4   ∧ wa 395   = wceq 1537   ∈ wcel 2106  ∀wral 3059  {csn 4631   ↦ cmpt 5231   × cxp 5687  ‘cfv 6563  (class class class)co 7431   ↑_m cmap 8865  Xcixp 8936  ∏_tcpt 17485  TopOnctopon 22932

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1908  ax-6 1965  ax-7 2005  ax-8 2108  ax-9 2116  ax-10 2139  ax-11 2155  ax-12 2175  ax-ext 2706  ax-rep 5285  ax-sep 5302  ax-nul 5312  ax-pow 5371  ax-pr 5438  ax-un 7754

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1540  df-fal 1550  df-ex 1777  df-nf 1781  df-sb 2063  df-mo 2538  df-eu 2567  df-clab 2713  df-cleq 2727  df-clel 2814  df-nfc 2890  df-ne 2939  df-ral 3060  df-rex 3069  df-reu 3379  df-rab 3434  df-v 3480  df-sbc 3792  df-csb 3909  df-dif 3966  df-un 3968  df-in 3970  df-ss 3980  df-pss 3983  df-nul 4340  df-if 4532  df-pw 4607  df-sn 4632  df-pr 4634  df-op 4638  df-uni 4913  df-int 4952  df-iun 4998  df-br 5149  df-opab 5211  df-mpt 5232  df-tr 5266  df-id 5583  df-eprel 5589  df-po 5597  df-so 5598  df-fr 5641  df-we 5643  df-xp 5695  df-rel 5696  df-cnv 5697  df-co 5698  df-dm 5699  df-rn 5700  df-res 5701  df-ima 5702  df-ord 6389  df-on 6390  df-lim 6391  df-suc 6392  df-iota 6516  df-fun 6565  df-fn 6566  df-f 6567  df-f1 6568  df-fo 6569  df-f1o 6570  df-fv 6571  df-ov 7434  df-oprab 7435  df-mpo 7436  df-om 7888  df-1o 8505  df-2o 8506  df-map 8867  df-ixp 8937  df-en 8985  df-fin 8988  df-fi 9449  df-topgen 17490  df-pt 17491  df-top 22916  df-topon 22933  df-bases 22969

This theorem is referenced by:  ptuniconst  23622  pt1hmeo  23830  tmdgsum  24119  efmndtmd  24125  symgtgp  24130  poimir  37640  broucube  37641