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Theorem obsrcl 21873
Description: Reverse closure for an orthonormal basis. (Contributed by Mario Carneiro, 23-Oct-2015.)
Assertion
Ref Expression
obsrcl (𝐵 ∈ (OBasis‘𝑊) → 𝑊 ∈ PreHil)

Proof of Theorem obsrcl
Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 eqid 2763 . . 3 (Base‘𝑊) = (Base‘𝑊)
2 eqid 2763 . . 3 (·𝑖𝑊) = (·𝑖𝑊)
3 eqid 2763 . . 3 (Scalar‘𝑊) = (Scalar‘𝑊)
4 eqid 2763 . . 3 (1r‘(Scalar‘𝑊)) = (1r‘(Scalar‘𝑊))
5 eqid 2763 . . 3 (0g‘(Scalar‘𝑊)) = (0g‘(Scalar‘𝑊))
6 eqid 2763 . . 3 (ocv‘𝑊) = (ocv‘𝑊)
7 eqid 2763 . . 3 (0g𝑊) = (0g𝑊)
81, 2, 3, 4, 5, 6, 7isobs 21870 . 2 (𝐵 ∈ (OBasis‘𝑊) ↔ (𝑊 ∈ PreHil ∧ 𝐵 ⊆ (Base‘𝑊) ∧ (∀𝑥𝐵𝑦𝐵 (𝑥(·𝑖𝑊)𝑦) = if(𝑥 = 𝑦, (1r‘(Scalar‘𝑊)), (0g‘(Scalar‘𝑊))) ∧ ((ocv‘𝑊)‘𝐵) = {(0g𝑊)})))
98simp1bi 1163 1 (𝐵 ∈ (OBasis‘𝑊) → 𝑊 ∈ PreHil)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   = wceq 1570  wcel 2143  wral 3079  wss 3905  ifcif 4487  {csn 4589  cfv 6536  (class class class)co 7410  Basecbs 17264  Scalarcsca 17308  ·𝑖cip 17310  0gc0g 17487  1rcur 20258  PreHilcphl 21774  ocvcocv 21810  OBasiscobs 21852
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5257  ax-nul 5269  ax-pow 5336  ax-pr 5404
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-dif 3908  df-un 3910  df-in 3912  df-ss 3922  df-nul 4287  df-if 4488  df-pw 4564  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4873  df-br 5110  df-opab 5174  df-mpt 5193  df-id 5556  df-xp 5667  df-rel 5668  df-cnv 5669  df-co 5670  df-dm 5671  df-rn 5672  df-res 5673  df-ima 5674  df-iota 6492  df-fun 6538  df-fv 6544  df-ov 7413  df-obs 21855
This theorem is referenced by:  obsne0  21875  obs2ocv  21877  obselocv  21878  obslbs  21880
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