Theorem pttoponconst 22202

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 3150	. . 3 ⊢ (𝑅 ∈ (TopOn‘𝑋) → ∀𝑥 ∈ 𝐴 𝑅 ∈ (TopOn‘𝑋))
3		ptuniconst.2	. . . . 5 ⊢ 𝐽 = (∏t‘(𝐴 × {𝑅}))
4		fconstmpt 5578	. . . . . 6 ⊢ (𝐴 × {𝑅}) = (𝑥 ∈ 𝐴 ↦ 𝑅)
5	4	fveq2i 6648	. . . . 5 ⊢ (∏t‘(𝐴 × {𝑅})) = (∏t‘(𝑥 ∈ 𝐴 ↦ 𝑅))
6	3, 5	eqtri 2821	. . . 4 ⊢ 𝐽 = (∏t‘(𝑥 ∈ 𝐴 ↦ 𝑅))
7	6	pttopon 22201	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ ∀𝑥 ∈ 𝐴 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘X𝑥 ∈ 𝐴 𝑋))
8	2, 7	sylan2 595	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘X𝑥 ∈ 𝐴 𝑋))
9		toponmax 21531	. . . 4 ⊢ (𝑅 ∈ (TopOn‘𝑋) → 𝑋 ∈ 𝑅)
10		ixpconstg 8453	. . . 4 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑋 ∈ 𝑅) → X𝑥 ∈ 𝐴 𝑋 = (𝑋 ↑m 𝐴))
11	9, 10	sylan2 595	. . 3 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → X𝑥 ∈ 𝐴 𝑋 = (𝑋 ↑m 𝐴))
12	11	fveq2d 6649	. 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → (TopOn‘X𝑥 ∈ 𝐴 𝑋) = (TopOn‘(𝑋 ↑m 𝐴)))
13	8, 12	eleqtrd 2892	1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝑅 ∈ (TopOn‘𝑋)) → 𝐽 ∈ (TopOn‘(𝑋 ↑m 𝐴)))

Syntax hints:   → wi 4   ∧ wa 399   = wceq 1538   ∈ wcel 2111  ∀wral 3106  {csn 4525   ↦ cmpt 5110   × cxp 5517  ‘cfv 6324  (class class class)co 7135   ↑_m cmap 8389  Xcixp 8444  ∏_tcpt 16704  TopOnctopon 21515

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2770  ax-rep 5154  ax-sep 5167  ax-nul 5174  ax-pow 5231  ax-pr 5295  ax-un 7441

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2598  df-eu 2629  df-clab 2777  df-cleq 2791  df-clel 2870  df-nfc 2938  df-ne 2988  df-ral 3111  df-rex 3112  df-reu 3113  df-rab 3115  df-v 3443  df-sbc 3721  df-csb 3829  df-dif 3884  df-un 3886  df-in 3888  df-ss 3898  df-pss 3900  df-nul 4244  df-if 4426  df-pw 4499  df-sn 4526  df-pr 4528  df-tp 4530  df-op 4532  df-uni 4801  df-int 4839  df-iun 4883  df-br 5031  df-opab 5093  df-mpt 5111  df-tr 5137  df-id 5425  df-eprel 5430  df-po 5438  df-so 5439  df-fr 5478  df-we 5480  df-xp 5525  df-rel 5526  df-cnv 5527  df-co 5528  df-dm 5529  df-rn 5530  df-res 5531  df-ima 5532  df-pred 6116  df-ord 6162  df-on 6163  df-lim 6164  df-suc 6165  df-iota 6283  df-fun 6326  df-fn 6327  df-f 6328  df-f1 6329  df-fo 6330  df-f1o 6331  df-fv 6332  df-ov 7138  df-oprab 7139  df-mpo 7140  df-om 7561  df-wrecs 7930  df-recs 7991  df-rdg 8029  df-1o 8085  df-oadd 8089  df-er 8272  df-map 8391  df-ixp 8445  df-en 8493  df-fin 8496  df-fi 8859  df-topgen 16709  df-pt 16710  df-top 21499  df-topon 21516  df-bases 21551

This theorem is referenced by:  ptuniconst  22203  pt1hmeo  22411  tmdgsum  22700  efmndtmd  22706  symgtgp  22711  poimir  35090  broucube  35091