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Theorem cncnpi 21063
Description: A continuous function is continuous at all points. One direction of Theorem 7.2(g) of [Munkres] p. 107. (Contributed by Raph Levien, 20-Nov-2006.) (Proof shortened by Mario Carneiro, 21-Aug-2015.)
Hypothesis
Ref Expression
cnsscnp.1 𝑋 = 𝐽
Assertion
Ref Expression
cncnpi ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐹 ∈ ((𝐽 CnP 𝐾)‘𝐴))

Proof of Theorem cncnpi
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cnsscnp.1 . . . 4 𝑋 = 𝐽
2 eqid 2620 . . . 4 𝐾 = 𝐾
31, 2cnf 21031 . . 3 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:𝑋 𝐾)
43adantr 481 . 2 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐹:𝑋 𝐾)
5 cnima 21050 . . . . . 6 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑦𝐾) → (𝐹𝑦) ∈ 𝐽)
65ad2ant2r 782 . . . . 5 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → (𝐹𝑦) ∈ 𝐽)
7 simpr 477 . . . . . . 7 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐴𝑋)
87adantr 481 . . . . . 6 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → 𝐴𝑋)
9 simprr 795 . . . . . 6 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → (𝐹𝐴) ∈ 𝑦)
103ad2antrr 761 . . . . . . 7 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → 𝐹:𝑋 𝐾)
11 ffn 6032 . . . . . . 7 (𝐹:𝑋 𝐾𝐹 Fn 𝑋)
12 elpreima 6323 . . . . . . 7 (𝐹 Fn 𝑋 → (𝐴 ∈ (𝐹𝑦) ↔ (𝐴𝑋 ∧ (𝐹𝐴) ∈ 𝑦)))
1310, 11, 123syl 18 . . . . . 6 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → (𝐴 ∈ (𝐹𝑦) ↔ (𝐴𝑋 ∧ (𝐹𝐴) ∈ 𝑦)))
148, 9, 13mpbir2and 956 . . . . 5 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → 𝐴 ∈ (𝐹𝑦))
15 eqimss 3649 . . . . . . . 8 (𝑥 = (𝐹𝑦) → 𝑥 ⊆ (𝐹𝑦))
1615biantrud 528 . . . . . . 7 (𝑥 = (𝐹𝑦) → (𝐴𝑥 ↔ (𝐴𝑥𝑥 ⊆ (𝐹𝑦))))
17 eleq2 2688 . . . . . . 7 (𝑥 = (𝐹𝑦) → (𝐴𝑥𝐴 ∈ (𝐹𝑦)))
1816, 17bitr3d 270 . . . . . 6 (𝑥 = (𝐹𝑦) → ((𝐴𝑥𝑥 ⊆ (𝐹𝑦)) ↔ 𝐴 ∈ (𝐹𝑦)))
1918rspcev 3304 . . . . 5 (((𝐹𝑦) ∈ 𝐽𝐴 ∈ (𝐹𝑦)) → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦)))
206, 14, 19syl2anc 692 . . . 4 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ (𝑦𝐾 ∧ (𝐹𝐴) ∈ 𝑦)) → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦)))
2120expr 642 . . 3 (((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) ∧ 𝑦𝐾) → ((𝐹𝐴) ∈ 𝑦 → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦))))
2221ralrimiva 2963 . 2 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → ∀𝑦𝐾 ((𝐹𝐴) ∈ 𝑦 → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦))))
23 cntop1 21025 . . . . 5 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top)
2423adantr 481 . . . 4 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐽 ∈ Top)
251toptopon 20703 . . . 4 (𝐽 ∈ Top ↔ 𝐽 ∈ (TopOn‘𝑋))
2624, 25sylib 208 . . 3 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐽 ∈ (TopOn‘𝑋))
27 cntop2 21026 . . . . 5 (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
2827adantr 481 . . . 4 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐾 ∈ Top)
292toptopon 20703 . . . 4 (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘ 𝐾))
3028, 29sylib 208 . . 3 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐾 ∈ (TopOn‘ 𝐾))
31 iscnp3 21029 . . 3 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘ 𝐾) ∧ 𝐴𝑋) → (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝐴) ↔ (𝐹:𝑋 𝐾 ∧ ∀𝑦𝐾 ((𝐹𝐴) ∈ 𝑦 → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦))))))
3226, 30, 7, 31syl3anc 1324 . 2 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → (𝐹 ∈ ((𝐽 CnP 𝐾)‘𝐴) ↔ (𝐹:𝑋 𝐾 ∧ ∀𝑦𝐾 ((𝐹𝐴) ∈ 𝑦 → ∃𝑥𝐽 (𝐴𝑥𝑥 ⊆ (𝐹𝑦))))))
334, 22, 32mpbir2and 956 1 ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝐴𝑋) → 𝐹 ∈ ((𝐽 CnP 𝐾)‘𝐴))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384   = wceq 1481  wcel 1988  wral 2909  wrex 2910  wss 3567   cuni 4427  ccnv 5103  cima 5107   Fn wfn 5871  wf 5872  cfv 5876  (class class class)co 6635  Topctop 20679  TopOnctopon 20696   Cn ccn 21009   CnP ccnp 21010
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1720  ax-4 1735  ax-5 1837  ax-6 1886  ax-7 1933  ax-8 1990  ax-9 1997  ax-10 2017  ax-11 2032  ax-12 2045  ax-13 2244  ax-ext 2600  ax-sep 4772  ax-nul 4780  ax-pow 4834  ax-pr 4897  ax-un 6934
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1484  df-ex 1703  df-nf 1708  df-sb 1879  df-eu 2472  df-mo 2473  df-clab 2607  df-cleq 2613  df-clel 2616  df-nfc 2751  df-ne 2792  df-ral 2914  df-rex 2915  df-rab 2918  df-v 3197  df-sbc 3430  df-dif 3570  df-un 3572  df-in 3574  df-ss 3581  df-nul 3908  df-if 4078  df-pw 4151  df-sn 4169  df-pr 4171  df-op 4175  df-uni 4428  df-br 4645  df-opab 4704  df-mpt 4721  df-id 5014  df-xp 5110  df-rel 5111  df-cnv 5112  df-co 5113  df-dm 5114  df-rn 5115  df-res 5116  df-ima 5117  df-iota 5839  df-fun 5878  df-fn 5879  df-f 5880  df-fv 5884  df-ov 6638  df-oprab 6639  df-mpt2 6640  df-map 7844  df-top 20680  df-topon 20697  df-cn 21012  df-cnp 21013
This theorem is referenced by:  cnsscnp  21064  cncnp  21065  lmcn  21090  ptcn  21411  tmdcn2  21874  ghmcnp  21899  tsmsmhm  21930  tsmsadd  21931  dvcnp2  23664  dvaddbr  23682  dvmulbr  23683  dvcobr  23690  dvcjbr  23693  dvcnvlem  23720  lhop1lem  23757  dvcnvrelem2  23762  ftc1cn  23787  taylthlem2  24109  psercn  24161  abelth  24176  cxpcn3  24470  efrlim  24677  blocni  27630  cvmlift2lem11  31269  cvmlift2lem12  31270  cvmlift3lem7  31281  poimir  33413  ftc1cnnc  33455  cncfiooicclem1  39869  fouriercn  40212
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