Theorem cnmpt11f 22272

Description: The composition of continuous functions is continuous. (Contributed by Mario Carneiro, 5-May-2014.) (Revised by Mario Carneiro, 22-Aug-2015.)

Hypotheses

Ref	Expression
cnmptid.j	⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
cnmpt11.a	⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝐴) ∈ (𝐽 Cn 𝐾))
cnmpt11f.f	⊢ (𝜑 → 𝐹 ∈ (𝐾 Cn 𝐿))

Assertion

Ref	Expression
cnmpt11f	⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ (𝐹‘𝐴)) ∈ (𝐽 Cn 𝐿))

Distinct variable groups:   𝑥,𝐹   𝜑,𝑥   𝑥,𝐽   𝑥,𝑋   𝑥,𝐾   𝑥,𝐿

Allowed substitution hint:   𝐴(𝑥)

Proof of Theorem cnmpt11f

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnmptid.j	. 2 ⊢ (𝜑 → 𝐽 ∈ (TopOn‘𝑋))
2		cnmpt11.a	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ 𝐴) ∈ (𝐽 Cn 𝐾))
3		cntop2 21849	. . . 4 ⊢ ((𝑥 ∈ 𝑋 ↦ 𝐴) ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
4	2, 3	syl 17	. . 3 ⊢ (𝜑 → 𝐾 ∈ Top)
5		toptopon2 21526	. . 3 ⊢ (𝐾 ∈ Top ↔ 𝐾 ∈ (TopOn‘∪ 𝐾))
6	4, 5	sylib 220	. 2 ⊢ (𝜑 → 𝐾 ∈ (TopOn‘∪ 𝐾))
7		cnmpt11f.f	. . . . 5 ⊢ (𝜑 → 𝐹 ∈ (𝐾 Cn 𝐿))
8		eqid 2821	. . . . . 6 ⊢ ∪ 𝐾 = ∪ 𝐾
9		eqid 2821	. . . . . 6 ⊢ ∪ 𝐿 = ∪ 𝐿
10	8, 9	cnf 21854	. . . . 5 ⊢ (𝐹 ∈ (𝐾 Cn 𝐿) → 𝐹:∪ 𝐾⟶∪ 𝐿)
11	7, 10	syl 17	. . . 4 ⊢ (𝜑 → 𝐹:∪ 𝐾⟶∪ 𝐿)
12	11	feqmptd 6733	. . 3 ⊢ (𝜑 → 𝐹 = (𝑦 ∈ ∪ 𝐾 ↦ (𝐹‘𝑦)))
13	12, 7	eqeltrrd 2914	. 2 ⊢ (𝜑 → (𝑦 ∈ ∪ 𝐾 ↦ (𝐹‘𝑦)) ∈ (𝐾 Cn 𝐿))
14		fveq2 6670	. 2 ⊢ (𝑦 = 𝐴 → (𝐹‘𝑦) = (𝐹‘𝐴))
15	1, 2, 6, 13, 14	cnmpt11 22271	1 ⊢ (𝜑 → (𝑥 ∈ 𝑋 ↦ (𝐹‘𝐴)) ∈ (𝐽 Cn 𝐿))

Syntax hints:   → wi 4   ∈ wcel 2114  ∪ cuni 4838   ↦ cmpt 5146  ⟶wf 6351  ‘cfv 6355  (class class class)co 7156  Topctop 21501  TopOnctopon 21518   Cn ccn 21832

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2793  ax-sep 5203  ax-nul 5210  ax-pow 5266  ax-pr 5330  ax-un 7461

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3773  df-csb 3884  df-dif 3939  df-un 3941  df-in 3943  df-ss 3952  df-nul 4292  df-if 4468  df-pw 4541  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4839  df-br 5067  df-opab 5129  df-mpt 5147  df-id 5460  df-xp 5561  df-rel 5562  df-cnv 5563  df-co 5564  df-dm 5565  df-rn 5566  df-res 5567  df-ima 5568  df-iota 6314  df-fun 6357  df-fn 6358  df-f 6359  df-fv 6363  df-ov 7159  df-oprab 7160  df-mpo 7161  df-map 8408  df-top 21502  df-topon 21519  df-cn 21835

This theorem is referenced by:  cnmpt12f  22274  tgpmulg  22701  prdstgpd  22733  pcorevcl  23629  pcorevlem  23630  logcn  25230  loglesqrt  25339  efrlim  25547  cvmliftlem8  32539  knoppcnlem10  33841  areacirclem2  34998  areacirclem4  35000