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Definition df-ch0 29011
Description: Define the zero for closed subspaces of Hilbert space. See h0elch 29013 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 28693 . 2 class 0
2 c0v 28682 . . 3 class 0
32csn 4539 . 2 class {0}
41, 3wceq 1537 1 wff 0 = {0}
Colors of variables: wff setvar class
This definition is referenced by:  elch0  29012  h0elch  29013  sh0le  29198  spansn0  29299  df0op2  29510  ho01i  29586  hh0oi  29661  nmop0h  29749
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