Definition df-ch0 31635

Description: Define the zero for closed subspaces of Hilbert space. See h0elch 31637 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 31317	. 2 class 0ℋ
2		c0v 31306	. . 3 class 0ℎ
3	2	csn 4594	. 2 class {0ℎ}
4	1, 3	wceq 1570	1 wff 0ℋ = {0ℎ}

This definition is used by:  elch0  31636  h0elch  31637  sh0le  31822  spansn0  31923  df0op2  32134  ho01i  32210  hh0oi  32285  nmop0h  32373