Theorem sgsiga 32089

Description: A generated sigma-algebra is a sigma-algebra. (Contributed by Thierry Arnoux, 30-Jan-2017.)

Hypothesis

Ref	Expression
sgsiga.1	⊢ (𝜑 → 𝐴 ∈ 𝑉)

Assertion

Ref	Expression
sgsiga	⊢ (𝜑 → (sigaGen‘𝐴) ∈ ∪ ran sigAlgebra)

Proof of Theorem sgsiga

Step	Hyp	Ref	Expression
1		sgsiga.1	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
2		sigagensiga 32088	. 2 ⊢ (𝐴 ∈ 𝑉 → (sigaGen‘𝐴) ∈ (sigAlgebra‘∪ 𝐴))
3		elrnsiga 32073	. 2 ⊢ ((sigaGen‘𝐴) ∈ (sigAlgebra‘∪ 𝐴) → (sigaGen‘𝐴) ∈ ∪ ran sigAlgebra)
4	1, 2, 3	3syl 18	1 ⊢ (𝜑 → (sigaGen‘𝐴) ∈ ∪ ran sigAlgebra)

Syntax hints:   → wi 4   ∈ wcel 2109  ∪ cuni 4844  ran crn 5589  ‘cfv 6430  sigAlgebracsiga 32055  sigaGencsigagen 32085

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-10 2140  ax-11 2157  ax-12 2174  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pow 5291  ax-pr 5355  ax-un 7579

This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-nf 1790  df-sb 2071  df-mo 2541  df-eu 2570  df-clab 2717  df-cleq 2731  df-clel 2817  df-nfc 2890  df-ne 2945  df-ral 3070  df-rex 3071  df-rab 3074  df-v 3432  df-sbc 3720  df-csb 3837  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-nul 4262  df-if 4465  df-pw 4540  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4845  df-int 4885  df-br 5079  df-opab 5141  df-mpt 5162  df-id 5488  df-xp 5594  df-rel 5595  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-iota 6388  df-fun 6432  df-fv 6438  df-siga 32056  df-sigagen 32086

This theorem is referenced by:  elsigagen2  32095  cldssbrsiga  32134  mbfmbfm  32204  imambfm  32208  sxbrsigalem2  32232  sxbrsiga  32236  sibf0  32280  sibff  32282  sibfinima  32285  sibfof  32286  sitgclg  32288  orvcval4  32406  orvcoel  32407  orvccel  32408