Definition df-tmd 22246

Description: Define the class of all topological monoids. A topological monoid is a monoid whose operation is continuous. (Contributed by Mario Carneiro, 19-Sep-2015.)

Assertion

Ref	Expression
df-tmd	⊢ TopMnd = {𝑓 ∈ (Mnd ∩ TopSp) ∣ [(TopOpen‘𝑓) / 𝑗](+𝑓‘𝑓) ∈ ((𝑗 ×t 𝑗) Cn 𝑗)}

Distinct variable group:   𝑓,𝑗

Detailed syntax breakdown of Definition df-tmd

Step	Hyp	Ref	Expression
1		ctmd 22244	. 2 class TopMnd
2		vf	. . . . . . 7 setvar 𝑓
3	2	cv 1657	. . . . . 6 class 𝑓
4		cplusf 17592	. . . . . 6 class +𝑓
5	3, 4	cfv 6123	. . . . 5 class (+𝑓‘𝑓)
6		vj	. . . . . . . 8 setvar 𝑗
7	6	cv 1657	. . . . . . 7 class 𝑗
8		ctx 21734	. . . . . . 7 class ×t
9	7, 7, 8	co 6905	. . . . . 6 class (𝑗 ×t 𝑗)
10		ccn 21399	. . . . . 6 class Cn
11	9, 7, 10	co 6905	. . . . 5 class ((𝑗 ×t 𝑗) Cn 𝑗)
12	5, 11	wcel 2166	. . . 4 wff (+𝑓‘𝑓) ∈ ((𝑗 ×t 𝑗) Cn 𝑗)
13		ctopn 16435	. . . . 5 class TopOpen
14	3, 13	cfv 6123	. . . 4 class (TopOpen‘𝑓)
15	12, 6, 14	wsbc 3662	. . 3 wff [(TopOpen‘𝑓) / 𝑗](+𝑓‘𝑓) ∈ ((𝑗 ×t 𝑗) Cn 𝑗)
16		cmnd 17647	. . . 4 class Mnd
17		ctps 21107	. . . 4 class TopSp
18	16, 17	cin 3797	. . 3 class (Mnd ∩ TopSp)
19	15, 2, 18	crab 3121	. 2 class {𝑓 ∈ (Mnd ∩ TopSp) ∣ [(TopOpen‘𝑓) / 𝑗](+𝑓‘𝑓) ∈ ((𝑗 ×t 𝑗) Cn 𝑗)}
20	1, 19	wceq 1658	1 wff TopMnd = {𝑓 ∈ (Mnd ∩ TopSp) ∣ [(TopOpen‘𝑓) / 𝑗](+𝑓‘𝑓) ∈ ((𝑗 ×t 𝑗) Cn 𝑗)}

This definition is referenced by:  istmd  22248