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Definition df-ch0 28238
Description: Define the zero for closed subspaces of Hilbert space. See h0elch 28240 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 27920 . 2 class 0
2 c0v 27909 . . 3 class 0
32csn 4210 . 2 class {0}
41, 3wceq 1523 1 wff 0 = {0}
Colors of variables: wff setvar class
This definition is referenced by:  elch0  28239  h0elch  28240  sh0le  28427  spansn0  28528  df0op2  28739  ho01i  28815  hh0oi  28890  nmop0h  28978
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