Definition df-tset

Description: Define the topology component of a topological space (structure). (Contributed by NM, 4-Sep-2011) (Revised by Mario Carneiro, 14-Aug-2015) Use its index-independent form tsetid instead. (New usage is discouraged.)

	Ref	Expression
Assertion	df-tset	$$⊢\mathrm{TopSet}=\mathrm{Slot}9$$

Detailed syntax breakdown

Step	Hyp	Ref	Expression
0		cts	$$class\mathrm{TopSet}$$
1		c9	$$class9$$
2	1	cslot	$$class\mathrm{Slot}9$$
3	0 2	wceq	$$wff\mathrm{TopSet}=\mathrm{Slot}9$$