Theorem cnmbfm 32230

Description: A continuous function is measurable with respect to the Borel Algebra of its domain and range. (Contributed by Thierry Arnoux, 3-Jun-2017.)

Hypotheses

Ref	Expression
cnmbfm.1	⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾))
cnmbfm.2	⊢ (𝜑 → 𝑆 = (sigaGen‘𝐽))
cnmbfm.3	⊢ (𝜑 → 𝑇 = (sigaGen‘𝐾))

Assertion

Ref	Expression
cnmbfm	⊢ (𝜑 → 𝐹 ∈ (𝑆MblFnM𝑇))

Proof of Theorem cnmbfm

Dummy variable 𝑎 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		cnmbfm.1	. . . 4 ⊢ (𝜑 → 𝐹 ∈ (𝐽 Cn 𝐾))
2		eqid 2738	. . . . 5 ⊢ ∪ 𝐽 = ∪ 𝐽
3		eqid 2738	. . . . 5 ⊢ ∪ 𝐾 = ∪ 𝐾
4	2, 3	cnf 22397	. . . 4 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐹:∪ 𝐽⟶∪ 𝐾)
5	1, 4	syl 17	. . 3 ⊢ (𝜑 → 𝐹:∪ 𝐽⟶∪ 𝐾)
6		cnmbfm.2	. . . . . 6 ⊢ (𝜑 → 𝑆 = (sigaGen‘𝐽))
7	6	unieqd 4853	. . . . 5 ⊢ (𝜑 → ∪ 𝑆 = ∪ (sigaGen‘𝐽))
8		cntop1 22391	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐽 ∈ Top)
9		unisg 32111	. . . . . 6 ⊢ (𝐽 ∈ Top → ∪ (sigaGen‘𝐽) = ∪ 𝐽)
10	1, 8, 9	3syl 18	. . . . 5 ⊢ (𝜑 → ∪ (sigaGen‘𝐽) = ∪ 𝐽)
11	7, 10	eqtrd 2778	. . . 4 ⊢ (𝜑 → ∪ 𝑆 = ∪ 𝐽)
12		cnmbfm.3	. . . . . 6 ⊢ (𝜑 → 𝑇 = (sigaGen‘𝐾))
13	12	unieqd 4853	. . . . 5 ⊢ (𝜑 → ∪ 𝑇 = ∪ (sigaGen‘𝐾))
14		cntop2 22392	. . . . . 6 ⊢ (𝐹 ∈ (𝐽 Cn 𝐾) → 𝐾 ∈ Top)
15		unisg 32111	. . . . . 6 ⊢ (𝐾 ∈ Top → ∪ (sigaGen‘𝐾) = ∪ 𝐾)
16	1, 14, 15	3syl 18	. . . . 5 ⊢ (𝜑 → ∪ (sigaGen‘𝐾) = ∪ 𝐾)
17	13, 16	eqtrd 2778	. . . 4 ⊢ (𝜑 → ∪ 𝑇 = ∪ 𝐾)
18	11, 17	feq23d 6595	. . 3 ⊢ (𝜑 → (𝐹:∪ 𝑆⟶∪ 𝑇 ↔ 𝐹:∪ 𝐽⟶∪ 𝐾))
19	5, 18	mpbird 256	. 2 ⊢ (𝜑 → 𝐹:∪ 𝑆⟶∪ 𝑇)
20		sssigagen 32113	. . . . . . 7 ⊢ (𝐽 ∈ Top → 𝐽 ⊆ (sigaGen‘𝐽))
21	1, 8, 20	3syl 18	. . . . . 6 ⊢ (𝜑 → 𝐽 ⊆ (sigaGen‘𝐽))
22	21, 6	sseqtrrd 3962	. . . . 5 ⊢ (𝜑 → 𝐽 ⊆ 𝑆)
23	22	adantr 481	. . . 4 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐾) → 𝐽 ⊆ 𝑆)
24		cnima 22416	. . . . 5 ⊢ ((𝐹 ∈ (𝐽 Cn 𝐾) ∧ 𝑎 ∈ 𝐾) → (◡𝐹 “ 𝑎) ∈ 𝐽)
25	1, 24	sylan 580	. . . 4 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐾) → (◡𝐹 “ 𝑎) ∈ 𝐽)
26	23, 25	sseldd 3922	. . 3 ⊢ ((𝜑 ∧ 𝑎 ∈ 𝐾) → (◡𝐹 “ 𝑎) ∈ 𝑆)
27	26	ralrimiva 3103	. 2 ⊢ (𝜑 → ∀𝑎 ∈ 𝐾 (◡𝐹 “ 𝑎) ∈ 𝑆)
28		elex 3450	. . . 4 ⊢ (𝐾 ∈ Top → 𝐾 ∈ V)
29	1, 14, 28	3syl 18	. . 3 ⊢ (𝜑 → 𝐾 ∈ V)
30		sigagensiga 32109	. . . . . 6 ⊢ (𝐽 ∈ Top → (sigaGen‘𝐽) ∈ (sigAlgebra‘∪ 𝐽))
31	1, 8, 30	3syl 18	. . . . 5 ⊢ (𝜑 → (sigaGen‘𝐽) ∈ (sigAlgebra‘∪ 𝐽))
32	6, 31	eqeltrd 2839	. . . 4 ⊢ (𝜑 → 𝑆 ∈ (sigAlgebra‘∪ 𝐽))
33		elrnsiga 32094	. . . 4 ⊢ (𝑆 ∈ (sigAlgebra‘∪ 𝐽) → 𝑆 ∈ ∪ ran sigAlgebra)
34	32, 33	syl 17	. . 3 ⊢ (𝜑 → 𝑆 ∈ ∪ ran sigAlgebra)
35	29, 34, 12	imambfm 32229	. 2 ⊢ (𝜑 → (𝐹 ∈ (𝑆MblFnM𝑇) ↔ (𝐹:∪ 𝑆⟶∪ 𝑇 ∧ ∀𝑎 ∈ 𝐾 (◡𝐹 “ 𝑎) ∈ 𝑆)))
36	19, 27, 35	mpbir2and 710	1 ⊢ (𝜑 → 𝐹 ∈ (𝑆MblFnM𝑇))

Syntax hints:   → wi 4   ∧ wa 396   = wceq 1539   ∈ wcel 2106  ∀wral 3064  Vcvv 3432   ⊆ wss 3887  ∪ cuni 4839  ^◡ccnv 5588  ran crn 5590   “ cima 5592  ⟶wf 6429  ‘cfv 6433  (class class class)co 7275  Topctop 22042   Cn ccn 22375  sigAlgebracsiga 32076  sigaGencsigagen 32106  MblFnMcmbfm 32217

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1798  ax-4 1812  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2709  ax-rep 5209  ax-sep 5223  ax-nul 5230  ax-pow 5288  ax-pr 5352  ax-un 7588  ax-inf2 9399  ax-ac2 10219

This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3or 1087  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1783  df-nf 1787  df-sb 2068  df-mo 2540  df-eu 2569  df-clab 2716  df-cleq 2730  df-clel 2816  df-nfc 2889  df-ne 2944  df-ral 3069  df-rex 3070  df-rmo 3071  df-reu 3072  df-rab 3073  df-v 3434  df-sbc 3717  df-csb 3833  df-dif 3890  df-un 3892  df-in 3894  df-ss 3904  df-pss 3906  df-nul 4257  df-if 4460  df-pw 4535  df-sn 4562  df-pr 4564  df-op 4568  df-uni 4840  df-int 4880  df-iun 4926  df-iin 4927  df-br 5075  df-opab 5137  df-mpt 5158  df-tr 5192  df-id 5489  df-eprel 5495  df-po 5503  df-so 5504  df-fr 5544  df-se 5545  df-we 5546  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-pred 6202  df-ord 6269  df-on 6270  df-lim 6271  df-suc 6272  df-iota 6391  df-fun 6435  df-fn 6436  df-f 6437  df-f1 6438  df-fo 6439  df-f1o 6440  df-fv 6441  df-isom 6442  df-riota 7232  df-ov 7278  df-oprab 7279  df-mpo 7280  df-om 7713  df-1st 7831  df-2nd 7832  df-frecs 8097  df-wrecs 8128  df-recs 8202  df-rdg 8241  df-1o 8297  df-2o 8298  df-er 8498  df-map 8617  df-en 8734  df-dom 8735  df-sdom 8736  df-fin 8737  df-oi 9269  df-dju 9659  df-card 9697  df-acn 9700  df-ac 9872  df-top 22043  df-topon 22060  df-cn 22378  df-siga 32077  df-sigagen 32107  df-mbfm 32218

This theorem is referenced by:  sxbrsiga  32257  rrvadd  32419  rrvmulc  32420