Theorem chex 31487

Description: The set of closed subspaces of a Hilbert space exists (is a set). (Contributed by NM, 23-Oct-1999.) (New usage is discouraged.)

Assertion

Ref	Expression
chex	⊢ Cℋ ∈ V

Proof of Theorem chex

Step	Hyp	Ref	Expression
1		shex 31473	. 2 ⊢ Sℋ ∈ V
2		chsssh 31486	. 2 ⊢ Cℋ ⊆ Sℋ
3	1, 2	ssexi 5283	1 ⊢ Cℋ ∈ V

Syntax hints:   ∈ wcel 2145  Vcvv 3457   S_ℋ csh 31189   C_ℋ cch 31190

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-ext 2737  ax-sep 5251  ax-pow 5327  ax-hilex 31260

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-sb 2094  df-clab 2744  df-cleq 2757  df-clel 2840  df-rab 3418  df-v 3459  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4869  df-br 5106  df-opab 5168  df-xp 5658  df-cnv 5660  df-dm 5662  df-rn 5663  df-res 5664  df-ima 5665  df-iota 6481  df-fv 6533  df-ov 7403  df-sh 31468  df-ch 31482

This theorem is referenced by:  isst  32474  ishst  32475