Definition df-esum 30860

Description: Define a short-hand for the possibly infinite sum over the extended nonnegative reals. Σ^* is relying on the properties of the tsums, developped by Mario Carneiro. (Contributed by Thierry Arnoux, 21-Sep-2016.)

Assertion

Ref	Expression
df-esum	⊢ Σ*𝑘 ∈ 𝐴𝐵 = ∪ ((ℝ*𝑠 ↾s (0[,]+∞)) tsums (𝑘 ∈ 𝐴 ↦ 𝐵))

Detailed syntax breakdown of Definition df-esum

Step	Hyp	Ref	Expression
1		cA	. . 3 class 𝐴
2		cB	. . 3 class 𝐵
3		vk	. . 3 setvar 𝑘
4	1, 2, 3	cesum 30859	. 2 class Σ*𝑘 ∈ 𝐴𝐵
5		cxrs 16590	. . . . 5 class ℝ*𝑠
6		cc0 10372	. . . . . 6 class 0
7		cpnf 10507	. . . . . 6 class +∞
8		cicc 12580	. . . . . 6 class [,]
9	6, 7, 8	co 7007	. . . . 5 class (0[,]+∞)
10		cress 16301	. . . . 5 class ↾s
11	5, 9, 10	co 7007	. . . 4 class (ℝ*𝑠 ↾s (0[,]+∞))
12	3, 1, 2	cmpt 5035	. . . 4 class (𝑘 ∈ 𝐴 ↦ 𝐵)
13		ctsu 22405	. . . 4 class tsums
14	11, 12, 13	co 7007	. . 3 class ((ℝ*𝑠 ↾s (0[,]+∞)) tsums (𝑘 ∈ 𝐴 ↦ 𝐵))
15	14	cuni 4739	. 2 class ∪ ((ℝ*𝑠 ↾s (0[,]+∞)) tsums (𝑘 ∈ 𝐴 ↦ 𝐵))
16	4, 15	wceq 1520	1 wff Σ*𝑘 ∈ 𝐴𝐵 = ∪ ((ℝ*𝑠 ↾s (0[,]+∞)) tsums (𝑘 ∈ 𝐴 ↦ 𝐵))

This definition is referenced by:  esumex  30861  esumcl  30862  esumeq12dvaf  30863  esumeq2  30868  nfesum1  30872  nfesum2  30873  cbvesum  30874  esumid  30876  esumval  30878  esumf1o  30882  esumsnf  30896  esumss  30904  esumpfinval  30907  esumpfinvalf  30908