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Definition df-ch0 31140
Description: Define the zero for closed subspaces of Hilbert space. See h0elch 31142 for closure law. (Contributed by NM, 30-May-1999.) (New usage is discouraged.)
Assertion
Ref Expression
df-ch0 0 = {0}

Detailed syntax breakdown of Definition df-ch0
StepHypRef Expression
1 c0h 30822 . 2 class 0
2 c0v 30811 . . 3 class 0
32csn 4630 . 2 class {0}
41, 3wceq 1533 1 wff 0 = {0}
Colors of variables: wff setvar class
This definition is referenced by:  elch0  31141  h0elch  31142  sh0le  31327  spansn0  31428  df0op2  31639  ho01i  31715  hh0oi  31790  nmop0h  31878
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