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Definition df-ch0 28080
Description: Define the zero for closed subspaces of Hilbert space. See h0elch 28082 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 27762 . 2 class 0
2 c0v 27751 . . 3 class 0
32csn 4168 . 2 class {0}
41, 3wceq 1481 1 wff 0 = {0}
Colors of variables: wff setvar class
This definition is referenced by:  elch0  28081  h0elch  28082  sh0le  28269  spansn0  28370  df0op2  28581  ho01i  28657  hh0oi  28732  nmop0h  28820
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