Definition df-ch0 28110

Description: Define the zero for closed subspaces of Hilbert space. See h0elch 28112 for closure law. (Contributed by NM, 30-May-1999.) (New usage is discouraged.)

Assertion

Ref	Expression
df-ch0	⊢ 0ℋ = {0ℎ}

Detailed syntax breakdown of Definition df-ch0

Step	Hyp	Ref	Expression
1		c0h 27792	. 2 class 0ℋ
2		c0v 27781	. . 3 class 0ℎ
3	2	csn 4177	. 2 class {0ℎ}
4	1, 3	wceq 1483	1 wff 0ℋ = {0ℎ}

This definition is referenced by:  elch0  28111  h0elch  28112  sh0le  28299  spansn0  28400  df0op2  28611  ho01i  28687  hh0oi  28762  nmop0h  28850