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Theorem cnmptcom 22287
Description: The argument converse of a continuous function is continuous. (Contributed by Mario Carneiro, 6-Jun-2014.)
Hypotheses
Ref Expression
cnmptcom.3 (𝜑𝐽 ∈ (TopOn‘𝑋))
cnmptcom.4 (𝜑𝐾 ∈ (TopOn‘𝑌))
cnmptcom.6 (𝜑 → (𝑥𝑋, 𝑦𝑌𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿))
Assertion
Ref Expression
cnmptcom (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴) ∈ ((𝐾 ×t 𝐽) Cn 𝐿))
Distinct variable groups:   𝑥,𝑦,𝐿   𝑥,𝑋,𝑦   𝜑,𝑥,𝑦   𝑥,𝑌,𝑦
Allowed substitution hints:   𝐴(𝑥,𝑦)   𝐽(𝑥,𝑦)   𝐾(𝑥,𝑦)

Proof of Theorem cnmptcom
Dummy variables 𝑧 𝑤 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cnmptcom.3 . . . . . . . . 9 (𝜑𝐽 ∈ (TopOn‘𝑋))
2 cnmptcom.4 . . . . . . . . 9 (𝜑𝐾 ∈ (TopOn‘𝑌))
3 txtopon 22200 . . . . . . . . 9 ((𝐽 ∈ (TopOn‘𝑋) ∧ 𝐾 ∈ (TopOn‘𝑌)) → (𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)))
41, 2, 3syl2anc 587 . . . . . . . 8 (𝜑 → (𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)))
5 cnmptcom.6 . . . . . . . . . 10 (𝜑 → (𝑥𝑋, 𝑦𝑌𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿))
6 cntop2 21850 . . . . . . . . . 10 ((𝑥𝑋, 𝑦𝑌𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿) → 𝐿 ∈ Top)
75, 6syl 17 . . . . . . . . 9 (𝜑𝐿 ∈ Top)
8 toptopon2 21527 . . . . . . . . 9 (𝐿 ∈ Top ↔ 𝐿 ∈ (TopOn‘ 𝐿))
97, 8sylib 221 . . . . . . . 8 (𝜑𝐿 ∈ (TopOn‘ 𝐿))
10 cnf2 21858 . . . . . . . 8 (((𝐽 ×t 𝐾) ∈ (TopOn‘(𝑋 × 𝑌)) ∧ 𝐿 ∈ (TopOn‘ 𝐿) ∧ (𝑥𝑋, 𝑦𝑌𝐴) ∈ ((𝐽 ×t 𝐾) Cn 𝐿)) → (𝑥𝑋, 𝑦𝑌𝐴):(𝑋 × 𝑌)⟶ 𝐿)
114, 9, 5, 10syl3anc 1368 . . . . . . 7 (𝜑 → (𝑥𝑋, 𝑦𝑌𝐴):(𝑋 × 𝑌)⟶ 𝐿)
12 eqid 2801 . . . . . . . . 9 (𝑥𝑋, 𝑦𝑌𝐴) = (𝑥𝑋, 𝑦𝑌𝐴)
1312fmpo 7752 . . . . . . . 8 (∀𝑥𝑋𝑦𝑌 𝐴 𝐿 ↔ (𝑥𝑋, 𝑦𝑌𝐴):(𝑋 × 𝑌)⟶ 𝐿)
14 ralcom 3310 . . . . . . . 8 (∀𝑥𝑋𝑦𝑌 𝐴 𝐿 ↔ ∀𝑦𝑌𝑥𝑋 𝐴 𝐿)
1513, 14bitr3i 280 . . . . . . 7 ((𝑥𝑋, 𝑦𝑌𝐴):(𝑋 × 𝑌)⟶ 𝐿 ↔ ∀𝑦𝑌𝑥𝑋 𝐴 𝐿)
1611, 15sylib 221 . . . . . 6 (𝜑 → ∀𝑦𝑌𝑥𝑋 𝐴 𝐿)
17 eqid 2801 . . . . . . 7 (𝑦𝑌, 𝑥𝑋𝐴) = (𝑦𝑌, 𝑥𝑋𝐴)
1817fmpo 7752 . . . . . 6 (∀𝑦𝑌𝑥𝑋 𝐴 𝐿 ↔ (𝑦𝑌, 𝑥𝑋𝐴):(𝑌 × 𝑋)⟶ 𝐿)
1916, 18sylib 221 . . . . 5 (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴):(𝑌 × 𝑋)⟶ 𝐿)
2019ffnd 6492 . . . 4 (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴) Fn (𝑌 × 𝑋))
21 fnov 7265 . . . 4 ((𝑦𝑌, 𝑥𝑋𝐴) Fn (𝑌 × 𝑋) ↔ (𝑦𝑌, 𝑥𝑋𝐴) = (𝑧𝑌, 𝑤𝑋 ↦ (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
2220, 21sylib 221 . . 3 (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴) = (𝑧𝑌, 𝑤𝑋 ↦ (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
23 nfcv 2958 . . . . . . 7 𝑦𝑧
24 nfcv 2958 . . . . . . 7 𝑥𝑧
25 nfcv 2958 . . . . . . 7 𝑥𝑤
26 nfv 1915 . . . . . . . 8 𝑦𝜑
27 nfcv 2958 . . . . . . . . . 10 𝑦𝑥
28 nfmpo2 7218 . . . . . . . . . 10 𝑦(𝑥𝑋, 𝑦𝑌𝐴)
2927, 28, 23nfov 7169 . . . . . . . . 9 𝑦(𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧)
30 nfmpo1 7217 . . . . . . . . . 10 𝑦(𝑦𝑌, 𝑥𝑋𝐴)
3123, 30, 27nfov 7169 . . . . . . . . 9 𝑦(𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥)
3229, 31nfeq 2971 . . . . . . . 8 𝑦(𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥)
3326, 32nfim 1897 . . . . . . 7 𝑦(𝜑 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥))
34 nfv 1915 . . . . . . . 8 𝑥𝜑
35 nfmpo1 7217 . . . . . . . . . 10 𝑥(𝑥𝑋, 𝑦𝑌𝐴)
3625, 35, 24nfov 7169 . . . . . . . . 9 𝑥(𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧)
37 nfmpo2 7218 . . . . . . . . . 10 𝑥(𝑦𝑌, 𝑥𝑋𝐴)
3824, 37, 25nfov 7169 . . . . . . . . 9 𝑥(𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)
3936, 38nfeq 2971 . . . . . . . 8 𝑥(𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)
4034, 39nfim 1897 . . . . . . 7 𝑥(𝜑 → (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤))
41 oveq2 7147 . . . . . . . . 9 (𝑦 = 𝑧 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧))
42 oveq1 7146 . . . . . . . . 9 (𝑦 = 𝑧 → (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥))
4341, 42eqeq12d 2817 . . . . . . . 8 (𝑦 = 𝑧 → ((𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥) ↔ (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥)))
4443imbi2d 344 . . . . . . 7 (𝑦 = 𝑧 → ((𝜑 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥)) ↔ (𝜑 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥))))
45 oveq1 7146 . . . . . . . . 9 (𝑥 = 𝑤 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧))
46 oveq2 7147 . . . . . . . . 9 (𝑥 = 𝑤 → (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤))
4745, 46eqeq12d 2817 . . . . . . . 8 (𝑥 = 𝑤 → ((𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥) ↔ (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
4847imbi2d 344 . . . . . . 7 (𝑥 = 𝑤 → ((𝜑 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑥)) ↔ (𝜑 → (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤))))
49 rsp2 3180 . . . . . . . . 9 (∀𝑦𝑌𝑥𝑋 𝐴 𝐿 → ((𝑦𝑌𝑥𝑋) → 𝐴 𝐿))
5049, 16syl11 33 . . . . . . . 8 ((𝑦𝑌𝑥𝑋) → (𝜑𝐴 𝐿))
5112ovmpt4g 7280 . . . . . . . . . . 11 ((𝑥𝑋𝑦𝑌𝐴 𝐿) → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = 𝐴)
52513com12 1120 . . . . . . . . . 10 ((𝑦𝑌𝑥𝑋𝐴 𝐿) → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = 𝐴)
5317ovmpt4g 7280 . . . . . . . . . 10 ((𝑦𝑌𝑥𝑋𝐴 𝐿) → (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥) = 𝐴)
5452, 53eqtr4d 2839 . . . . . . . . 9 ((𝑦𝑌𝑥𝑋𝐴 𝐿) → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥))
55543expia 1118 . . . . . . . 8 ((𝑦𝑌𝑥𝑋) → (𝐴 𝐿 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥)))
5650, 55syld 47 . . . . . . 7 ((𝑦𝑌𝑥𝑋) → (𝜑 → (𝑥(𝑥𝑋, 𝑦𝑌𝐴)𝑦) = (𝑦(𝑦𝑌, 𝑥𝑋𝐴)𝑥)))
5723, 24, 25, 33, 40, 44, 48, 56vtocl2gaf 3527 . . . . . 6 ((𝑧𝑌𝑤𝑋) → (𝜑 → (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
5857com12 32 . . . . 5 (𝜑 → ((𝑧𝑌𝑤𝑋) → (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
59583impib 1113 . . . 4 ((𝜑𝑧𝑌𝑤𝑋) → (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧) = (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤))
6059mpoeq3dva 7214 . . 3 (𝜑 → (𝑧𝑌, 𝑤𝑋 ↦ (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧)) = (𝑧𝑌, 𝑤𝑋 ↦ (𝑧(𝑦𝑌, 𝑥𝑋𝐴)𝑤)))
6122, 60eqtr4d 2839 . 2 (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴) = (𝑧𝑌, 𝑤𝑋 ↦ (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧)))
622, 1cnmpt2nd 22278 . . 3 (𝜑 → (𝑧𝑌, 𝑤𝑋𝑤) ∈ ((𝐾 ×t 𝐽) Cn 𝐽))
632, 1cnmpt1st 22277 . . 3 (𝜑 → (𝑧𝑌, 𝑤𝑋𝑧) ∈ ((𝐾 ×t 𝐽) Cn 𝐾))
642, 1, 62, 63, 5cnmpt22f 22284 . 2 (𝜑 → (𝑧𝑌, 𝑤𝑋 ↦ (𝑤(𝑥𝑋, 𝑦𝑌𝐴)𝑧)) ∈ ((𝐾 ×t 𝐽) Cn 𝐿))
6561, 64eqeltrd 2893 1 (𝜑 → (𝑦𝑌, 𝑥𝑋𝐴) ∈ ((𝐾 ×t 𝐽) Cn 𝐿))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399  w3a 1084   = wceq 1538  wcel 2112  wral 3109   cuni 4803   × cxp 5521   Fn wfn 6323  wf 6324  cfv 6328  (class class class)co 7139  cmpo 7141  Topctop 21502  TopOnctopon 21519   Cn ccn 21833   ×t ctx 22169
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 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2773  ax-sep 5170  ax-nul 5177  ax-pow 5234  ax-pr 5298  ax-un 7445
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2601  df-eu 2632  df-clab 2780  df-cleq 2794  df-clel 2873  df-nfc 2941  df-ne 2991  df-ral 3114  df-rex 3115  df-rab 3118  df-v 3446  df-sbc 3724  df-csb 3832  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-nul 4247  df-if 4429  df-pw 4502  df-sn 4529  df-pr 4531  df-op 4535  df-uni 4804  df-iun 4886  df-br 5034  df-opab 5096  df-mpt 5114  df-id 5428  df-xp 5529  df-rel 5530  df-cnv 5531  df-co 5532  df-dm 5533  df-rn 5534  df-res 5535  df-ima 5536  df-iota 6287  df-fun 6330  df-fn 6331  df-f 6332  df-fo 6334  df-fv 6336  df-ov 7142  df-oprab 7143  df-mpo 7144  df-1st 7675  df-2nd 7676  df-map 8395  df-topgen 16713  df-top 21503  df-topon 21520  df-bases 21555  df-cn 21836  df-tx 22171
This theorem is referenced by:  cnmpt2k  22297  htpycc  23589
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