Definition df-ch0 31324

Description: Define the zero for closed subspaces of Hilbert space. See h0elch 31326 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 31006	. 2 class 0ℋ
2		c0v 30995	. . 3 class 0ℎ
3	2	csn 4567	. 2 class {0ℎ}
4	1, 3	wceq 1542	1 wff 0ℋ = {0ℎ}

This definition is referenced by:  elch0  31325  h0elch  31326  sh0le  31511  spansn0  31612  df0op2  31823  ho01i  31899  hh0oi  31974  nmop0h  32062