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Theorem ptcld 21745
Description: A closed box in the product topology. (Contributed by Stefan O'Rear, 22-Feb-2015.)
Hypotheses
Ref Expression
ptcld.a (𝜑𝐴𝑉)
ptcld.f (𝜑𝐹:𝐴⟶Top)
ptcld.c ((𝜑𝑘𝐴) → 𝐶 ∈ (Clsd‘(𝐹𝑘)))
Assertion
Ref Expression
ptcld (𝜑X𝑘𝐴 𝐶 ∈ (Clsd‘(∏t𝐹)))
Distinct variable groups:   𝜑,𝑘   𝐴,𝑘   𝑘,𝐹   𝑘,𝑉
Allowed substitution hint:   𝐶(𝑘)

Proof of Theorem ptcld
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 ptcld.c . . . . 5 ((𝜑𝑘𝐴) → 𝐶 ∈ (Clsd‘(𝐹𝑘)))
2 eqid 2799 . . . . . 6 (𝐹𝑘) = (𝐹𝑘)
32cldss 21162 . . . . 5 (𝐶 ∈ (Clsd‘(𝐹𝑘)) → 𝐶 (𝐹𝑘))
41, 3syl 17 . . . 4 ((𝜑𝑘𝐴) → 𝐶 (𝐹𝑘))
54ralrimiva 3147 . . 3 (𝜑 → ∀𝑘𝐴 𝐶 (𝐹𝑘))
6 boxriin 8190 . . 3 (∀𝑘𝐴 𝐶 (𝐹𝑘) → X𝑘𝐴 𝐶 = (X𝑘𝐴 (𝐹𝑘) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))))
75, 6syl 17 . 2 (𝜑X𝑘𝐴 𝐶 = (X𝑘𝐴 (𝐹𝑘) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))))
8 ptcld.a . . . . 5 (𝜑𝐴𝑉)
9 ptcld.f . . . . 5 (𝜑𝐹:𝐴⟶Top)
10 eqid 2799 . . . . . 6 (∏t𝐹) = (∏t𝐹)
1110ptuni 21726 . . . . 5 ((𝐴𝑉𝐹:𝐴⟶Top) → X𝑘𝐴 (𝐹𝑘) = (∏t𝐹))
128, 9, 11syl2anc 580 . . . 4 (𝜑X𝑘𝐴 (𝐹𝑘) = (∏t𝐹))
1312ineq1d 4011 . . 3 (𝜑 → (X𝑘𝐴 (𝐹𝑘) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = ( (∏t𝐹) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))))
14 pttop 21714 . . . . 5 ((𝐴𝑉𝐹:𝐴⟶Top) → (∏t𝐹) ∈ Top)
158, 9, 14syl2anc 580 . . . 4 (𝜑 → (∏t𝐹) ∈ Top)
16 sseq1 3822 . . . . . . . . . . 11 (𝐶 = if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) → (𝐶 (𝐹𝑘) ↔ if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (𝐹𝑘)))
17 sseq1 3822 . . . . . . . . . . 11 ( (𝐹𝑘) = if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) → ( (𝐹𝑘) ⊆ (𝐹𝑘) ↔ if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (𝐹𝑘)))
18 simpl 475 . . . . . . . . . . 11 ((𝐶 (𝐹𝑘) ∧ 𝑘 = 𝑥) → 𝐶 (𝐹𝑘))
19 ssidd 3820 . . . . . . . . . . 11 ((𝐶 (𝐹𝑘) ∧ ¬ 𝑘 = 𝑥) → (𝐹𝑘) ⊆ (𝐹𝑘))
2016, 17, 18, 19ifbothda 4314 . . . . . . . . . 10 (𝐶 (𝐹𝑘) → if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (𝐹𝑘))
2120ralimi 3133 . . . . . . . . 9 (∀𝑘𝐴 𝐶 (𝐹𝑘) → ∀𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (𝐹𝑘))
22 ss2ixp 8161 . . . . . . . . 9 (∀𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (𝐹𝑘) → X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ X𝑘𝐴 (𝐹𝑘))
235, 21, 223syl 18 . . . . . . . 8 (𝜑X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ X𝑘𝐴 (𝐹𝑘))
2423adantr 473 . . . . . . 7 ((𝜑𝑥𝐴) → X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ X𝑘𝐴 (𝐹𝑘))
2512adantr 473 . . . . . . 7 ((𝜑𝑥𝐴) → X𝑘𝐴 (𝐹𝑘) = (∏t𝐹))
2624, 25sseqtrd 3837 . . . . . 6 ((𝜑𝑥𝐴) → X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (∏t𝐹))
2712eqcomd 2805 . . . . . . . . . 10 (𝜑 (∏t𝐹) = X𝑘𝐴 (𝐹𝑘))
2827difeq1d 3925 . . . . . . . . 9 (𝜑 → ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = (X𝑘𝐴 (𝐹𝑘) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))))
2928adantr 473 . . . . . . . 8 ((𝜑𝑥𝐴) → ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = (X𝑘𝐴 (𝐹𝑘) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))))
30 simpr 478 . . . . . . . . 9 ((𝜑𝑥𝐴) → 𝑥𝐴)
315adantr 473 . . . . . . . . 9 ((𝜑𝑥𝐴) → ∀𝑘𝐴 𝐶 (𝐹𝑘))
32 boxcutc 8191 . . . . . . . . 9 ((𝑥𝐴 ∧ ∀𝑘𝐴 𝐶 (𝐹𝑘)) → (X𝑘𝐴 (𝐹𝑘) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)))
3330, 31, 32syl2anc 580 . . . . . . . 8 ((𝜑𝑥𝐴) → (X𝑘𝐴 (𝐹𝑘) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)))
34 ixpeq2 8162 . . . . . . . . . 10 (∀𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)) = if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)) → X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)))
35 fveq2 6411 . . . . . . . . . . . . . 14 (𝑘 = 𝑥 → (𝐹𝑘) = (𝐹𝑥))
3635unieqd 4638 . . . . . . . . . . . . 13 (𝑘 = 𝑥 (𝐹𝑘) = (𝐹𝑥))
37 csbeq1a 3737 . . . . . . . . . . . . 13 (𝑘 = 𝑥𝐶 = 𝑥 / 𝑘𝐶)
3836, 37difeq12d 3927 . . . . . . . . . . . 12 (𝑘 = 𝑥 → ( (𝐹𝑘) ∖ 𝐶) = ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶))
3938adantl 474 . . . . . . . . . . 11 ((𝑘𝐴𝑘 = 𝑥) → ( (𝐹𝑘) ∖ 𝐶) = ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶))
4039ifeq1da 4307 . . . . . . . . . 10 (𝑘𝐴 → if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)) = if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)))
4134, 40mprg 3107 . . . . . . . . 9 X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘))
4241a1i 11 . . . . . . . 8 ((𝜑𝑥𝐴) → X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑘) ∖ 𝐶), (𝐹𝑘)) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)))
4329, 33, 423eqtrd 2837 . . . . . . 7 ((𝜑𝑥𝐴) → ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) = X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)))
448adantr 473 . . . . . . . 8 ((𝜑𝑥𝐴) → 𝐴𝑉)
459adantr 473 . . . . . . . 8 ((𝜑𝑥𝐴) → 𝐹:𝐴⟶Top)
461ralrimiva 3147 . . . . . . . . . . 11 (𝜑 → ∀𝑘𝐴 𝐶 ∈ (Clsd‘(𝐹𝑘)))
47 nfv 2010 . . . . . . . . . . . 12 𝑥 𝐶 ∈ (Clsd‘(𝐹𝑘))
48 nfcsb1v 3744 . . . . . . . . . . . . 13 𝑘𝑥 / 𝑘𝐶
4948nfel1 2956 . . . . . . . . . . . 12 𝑘𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥))
50 2fveq3 6416 . . . . . . . . . . . . 13 (𝑘 = 𝑥 → (Clsd‘(𝐹𝑘)) = (Clsd‘(𝐹𝑥)))
5137, 50eleq12d 2872 . . . . . . . . . . . 12 (𝑘 = 𝑥 → (𝐶 ∈ (Clsd‘(𝐹𝑘)) ↔ 𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥))))
5247, 49, 51cbvral 3350 . . . . . . . . . . 11 (∀𝑘𝐴 𝐶 ∈ (Clsd‘(𝐹𝑘)) ↔ ∀𝑥𝐴 𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥)))
5346, 52sylib 210 . . . . . . . . . 10 (𝜑 → ∀𝑥𝐴 𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥)))
5453r19.21bi 3113 . . . . . . . . 9 ((𝜑𝑥𝐴) → 𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥)))
55 eqid 2799 . . . . . . . . . 10 (𝐹𝑥) = (𝐹𝑥)
5655cldopn 21164 . . . . . . . . 9 (𝑥 / 𝑘𝐶 ∈ (Clsd‘(𝐹𝑥)) → ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶) ∈ (𝐹𝑥))
5754, 56syl 17 . . . . . . . 8 ((𝜑𝑥𝐴) → ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶) ∈ (𝐹𝑥))
5844, 45, 57ptopn2 21716 . . . . . . 7 ((𝜑𝑥𝐴) → X𝑘𝐴 if(𝑘 = 𝑥, ( (𝐹𝑥) ∖ 𝑥 / 𝑘𝐶), (𝐹𝑘)) ∈ (∏t𝐹))
5943, 58eqeltrd 2878 . . . . . 6 ((𝜑𝑥𝐴) → ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (∏t𝐹))
60 eqid 2799 . . . . . . . . 9 (∏t𝐹) = (∏t𝐹)
6160iscld 21160 . . . . . . . 8 ((∏t𝐹) ∈ Top → (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹)) ↔ (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (∏t𝐹) ∧ ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (∏t𝐹))))
6215, 61syl 17 . . . . . . 7 (𝜑 → (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹)) ↔ (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (∏t𝐹) ∧ ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (∏t𝐹))))
6362adantr 473 . . . . . 6 ((𝜑𝑥𝐴) → (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹)) ↔ (X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ⊆ (∏t𝐹) ∧ ( (∏t𝐹) ∖ X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (∏t𝐹))))
6426, 59, 63mpbir2and 705 . . . . 5 ((𝜑𝑥𝐴) → X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹)))
6564ralrimiva 3147 . . . 4 (𝜑 → ∀𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹)))
6660riincld 21177 . . . 4 (((∏t𝐹) ∈ Top ∧ ∀𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘)) ∈ (Clsd‘(∏t𝐹))) → ( (∏t𝐹) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (Clsd‘(∏t𝐹)))
6715, 65, 66syl2anc 580 . . 3 (𝜑 → ( (∏t𝐹) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (Clsd‘(∏t𝐹)))
6813, 67eqeltrd 2878 . 2 (𝜑 → (X𝑘𝐴 (𝐹𝑘) ∩ 𝑥𝐴 X𝑘𝐴 if(𝑘 = 𝑥, 𝐶, (𝐹𝑘))) ∈ (Clsd‘(∏t𝐹)))
697, 68eqeltrd 2878 1 (𝜑X𝑘𝐴 𝐶 ∈ (Clsd‘(∏t𝐹)))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wb 198  wa 385   = wceq 1653  wcel 2157  wral 3089  csb 3728  cdif 3766  cin 3768  wss 3769  ifcif 4277   cuni 4628   ciin 4711  wf 6097  cfv 6101  Xcixp 8148  tcpt 16414  Topctop 21026  Clsdccld 21149
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1891  ax-4 1905  ax-5 2006  ax-6 2072  ax-7 2107  ax-8 2159  ax-9 2166  ax-10 2185  ax-11 2200  ax-12 2213  ax-13 2377  ax-ext 2777  ax-rep 4964  ax-sep 4975  ax-nul 4983  ax-pow 5035  ax-pr 5097  ax-un 7183
This theorem depends on definitions:  df-bi 199  df-an 386  df-or 875  df-3or 1109  df-3an 1110  df-tru 1657  df-ex 1876  df-nf 1880  df-sb 2065  df-mo 2591  df-eu 2609  df-clab 2786  df-cleq 2792  df-clel 2795  df-nfc 2930  df-ne 2972  df-ral 3094  df-rex 3095  df-reu 3096  df-rab 3098  df-v 3387  df-sbc 3634  df-csb 3729  df-dif 3772  df-un 3774  df-in 3776  df-ss 3783  df-pss 3785  df-nul 4116  df-if 4278  df-pw 4351  df-sn 4369  df-pr 4371  df-tp 4373  df-op 4375  df-uni 4629  df-int 4668  df-iun 4712  df-iin 4713  df-br 4844  df-opab 4906  df-mpt 4923  df-tr 4946  df-id 5220  df-eprel 5225  df-po 5233  df-so 5234  df-fr 5271  df-we 5273  df-xp 5318  df-rel 5319  df-cnv 5320  df-co 5321  df-dm 5322  df-rn 5323  df-res 5324  df-ima 5325  df-pred 5898  df-ord 5944  df-on 5945  df-lim 5946  df-suc 5947  df-iota 6064  df-fun 6103  df-fn 6104  df-f 6105  df-f1 6106  df-fo 6107  df-f1o 6108  df-fv 6109  df-ov 6881  df-oprab 6882  df-mpt2 6883  df-om 7300  df-wrecs 7645  df-recs 7707  df-rdg 7745  df-1o 7799  df-oadd 7803  df-er 7982  df-ixp 8149  df-en 8196  df-fin 8199  df-fi 8559  df-topgen 16419  df-pt 16420  df-top 21027  df-bases 21079  df-cld 21152
This theorem is referenced by:  ptcldmpt  21746
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