Definition df-ch0 31339

Description: Define the zero for closed subspaces of Hilbert space. See h0elch 31341 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 31021	. 2 class 0ℋ
2		c0v 31010	. . 3 class 0ℎ
3	2	csn 4568	. 2 class {0ℎ}
4	1, 3	wceq 1542	1 wff 0ℋ = {0ℎ}

This definition is referenced by:  elch0  31340  h0elch  31341  sh0le  31526  spansn0  31627  df0op2  31838  ho01i  31914  hh0oi  31989  nmop0h  32077