incexc2 - Metamath Proof Explorer

	Metamath Proof Explorer		< Previous Next > Nearby theorems
Mirrors > Home > MPE Home > Th. List > incexc2		Structured version Visualization version GIF version

Theorem incexc2 14570

Description: The inclusion/exclusion principle for counting the elements of a finite union of finite sets. (Contributed by Mario Carneiro, 7-Aug-2017.)

**Assertion**
Ref	Expression
incexc2	⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (#‘∪ 𝐴) = Σ𝑛 ∈ (1...(#‘𝐴))((-1↑(𝑛 − 1)) · Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘∩ 𝑠)))

Distinct variable group: 𝑘,𝑛,𝑠,𝐴

**Proof of Theorem incexc2**
Step	Hyp	Ref	Expression
1		incexc 14569	. . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (#‘∪ 𝐴) = Σ𝑠 ∈ (𝒫 𝐴 ∖ {∅})((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)))
2		hashcl 13147	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ Fin → (#‘𝐴) ∈ ℕ₀)
3	2	ad2antrr 762	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (#‘𝐴) ∈ ℕ₀)
4	3	nn0zd 11480	. . . . . . . . . 10 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (#‘𝐴) ∈ ℤ)
5		simpl 473	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → 𝐴 ∈ Fin)
6		elpwi 4168	. . . . . . . . . . . 12 ⊢ (𝑘 ∈ 𝒫 𝐴 → 𝑘 ⊆ 𝐴)
7		ssdomg 8001	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ Fin → (𝑘 ⊆ 𝐴 → 𝑘 ≼ 𝐴))
8	7	imp 445	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ Fin ∧ 𝑘 ⊆ 𝐴) → 𝑘 ≼ 𝐴)
9	5, 6, 8	syl2an 494	. . . . . . . . . . 11 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → 𝑘 ≼ 𝐴)
10		hashdomi 13169	. . . . . . . . . . 11 ⊢ (𝑘 ≼ 𝐴 → (#‘𝑘) ≤ (#‘𝐴))
11	9, 10	syl 17	. . . . . . . . . 10 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (#‘𝑘) ≤ (#‘𝐴))
12		fznn 12408	. . . . . . . . . . 11 ⊢ ((#‘𝐴) ∈ ℤ → ((#‘𝑘) ∈ (1...(#‘𝐴)) ↔ ((#‘𝑘) ∈ ℕ ∧ (#‘𝑘) ≤ (#‘𝐴))))
13	12	rbaibd 949	. . . . . . . . . 10 ⊢ (((#‘𝐴) ∈ ℤ ∧ (#‘𝑘) ≤ (#‘𝐴)) → ((#‘𝑘) ∈ (1...(#‘𝐴)) ↔ (#‘𝑘) ∈ ℕ))
14	4, 11, 13	syl2anc 693	. . . . . . . . 9 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → ((#‘𝑘) ∈ (1...(#‘𝐴)) ↔ (#‘𝑘) ∈ ℕ))
15		ssfi 8180	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ Fin ∧ 𝑘 ⊆ 𝐴) → 𝑘 ∈ Fin)
16	5, 6, 15	syl2an 494	. . . . . . . . . 10 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → 𝑘 ∈ Fin)
17		hashnncl 13157	. . . . . . . . . 10 ⊢ (𝑘 ∈ Fin → ((#‘𝑘) ∈ ℕ ↔ 𝑘 ≠ ∅))
18	16, 17	syl 17	. . . . . . . . 9 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → ((#‘𝑘) ∈ ℕ ↔ 𝑘 ≠ ∅))
19	14, 18	bitr2d 269	. . . . . . . 8 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (𝑘 ≠ ∅ ↔ (#‘𝑘) ∈ (1...(#‘𝐴))))
20		df-ne 2795	. . . . . . . 8 ⊢ (𝑘 ≠ ∅ ↔ ¬ 𝑘 = ∅)
21		risset 3062	. . . . . . . 8 ⊢ ((#‘𝑘) ∈ (1...(#‘𝐴)) ↔ ∃𝑛 ∈ (1...(#‘𝐴))𝑛 = (#‘𝑘))
22	19, 20, 21	3bitr3g 302	. . . . . . 7 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (¬ 𝑘 = ∅ ↔ ∃𝑛 ∈ (1...(#‘𝐴))𝑛 = (#‘𝑘)))
23		velsn 4193	. . . . . . . 8 ⊢ (𝑘 ∈ {∅} ↔ 𝑘 = ∅)
24	23	notbii 310	. . . . . . 7 ⊢ (¬ 𝑘 ∈ {∅} ↔ ¬ 𝑘 = ∅)
25		eqcom 2629	. . . . . . . 8 ⊢ ((#‘𝑘) = 𝑛 ↔ 𝑛 = (#‘𝑘))
26	25	rexbii 3041	. . . . . . 7 ⊢ (∃𝑛 ∈ (1...(#‘𝐴))(#‘𝑘) = 𝑛 ↔ ∃𝑛 ∈ (1...(#‘𝐴))𝑛 = (#‘𝑘))
27	22, 24, 26	3bitr4g 303	. . . . . 6 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑘 ∈ 𝒫 𝐴) → (¬ 𝑘 ∈ {∅} ↔ ∃𝑛 ∈ (1...(#‘𝐴))(#‘𝑘) = 𝑛))
28	27	rabbidva 3188	. . . . 5 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → {𝑘 ∈ 𝒫 𝐴 ∣ ¬ 𝑘 ∈ {∅}} = {𝑘 ∈ 𝒫 𝐴 ∣ ∃𝑛 ∈ (1...(#‘𝐴))(#‘𝑘) = 𝑛})
29		dfdif2 3583	. . . . 5 ⊢ (𝒫 𝐴 ∖ {∅}) = {𝑘 ∈ 𝒫 𝐴 ∣ ¬ 𝑘 ∈ {∅}}
30		iunrab 4567	. . . . 5 ⊢ ∪ 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} = {𝑘 ∈ 𝒫 𝐴 ∣ ∃𝑛 ∈ (1...(#‘𝐴))(#‘𝑘) = 𝑛}
31	28, 29, 30	3eqtr4g 2681	. . . 4 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (𝒫 𝐴 ∖ {∅}) = ∪ 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛})
32	31	sumeq1d 14431	. . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → Σ𝑠 ∈ (𝒫 𝐴 ∖ {∅})((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = Σ𝑠 ∈ ∪ 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)))
33	1, 32	eqtrd 2656	. 2 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (#‘∪ 𝐴) = Σ𝑠 ∈ ∪ 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)))
34		fzfid 12772	. . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (1...(#‘𝐴)) ∈ Fin)
35		simpll 790	. . . . 5 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝐴 ∈ Fin)
36		pwfi 8261	. . . . 5 ⊢ (𝐴 ∈ Fin ↔ 𝒫 𝐴 ∈ Fin)
37	35, 36	sylib 208	. . . 4 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝒫 𝐴 ∈ Fin)
38		ssrab2 3687	. . . 4 ⊢ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ⊆ 𝒫 𝐴
39		ssfi 8180	. . . 4 ⊢ ((𝒫 𝐴 ∈ Fin ∧ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ⊆ 𝒫 𝐴) → {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ∈ Fin)
40	37, 38, 39	sylancl 694	. . 3 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ∈ Fin)
41		fveq2 6191	. . . . . . . . . 10 ⊢ (𝑘 = 𝑠 → (#‘𝑘) = (#‘𝑠))
42	41	eqeq1d 2624	. . . . . . . . 9 ⊢ (𝑘 = 𝑠 → ((#‘𝑘) = 𝑛 ↔ (#‘𝑠) = 𝑛))
43	42	elrab 3363	. . . . . . . 8 ⊢ (𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ↔ (𝑠 ∈ 𝒫 𝐴 ∧ (#‘𝑠) = 𝑛))
44	43	simprbi 480	. . . . . . 7 ⊢ (𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} → (#‘𝑠) = 𝑛)
45	44	adantl 482	. . . . . 6 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (#‘𝑠) = 𝑛)
46	45	ralrimiva 2966	. . . . 5 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → ∀𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘𝑠) = 𝑛)
47	46	ralrimiva 2966	. . . 4 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → ∀𝑛 ∈ (1...(#‘𝐴))∀𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘𝑠) = 𝑛)
48		invdisj 4638	. . . 4 ⊢ (∀𝑛 ∈ (1...(#‘𝐴))∀𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘𝑠) = 𝑛 → Disj 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛})
49	47, 48	syl 17	. . 3 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → Disj 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛})
50	45	oveq1d 6665	. . . . . . 7 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ((#‘𝑠) − 1) = (𝑛 − 1))
51	50	oveq2d 6666	. . . . . 6 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (-1↑((#‘𝑠) − 1)) = (-1↑(𝑛 − 1)))
52	51	oveq1d 6665	. . . . 5 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = ((-1↑(𝑛 − 1)) · (#‘∩ 𝑠)))
53		1cnd 10056	. . . . . . . . 9 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 1 ∈ ℂ)
54	53	negcld 10379	. . . . . . . 8 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → -1 ∈ ℂ)
55		elfznn 12370	. . . . . . . . . 10 ⊢ (𝑛 ∈ (1...(#‘𝐴)) → 𝑛 ∈ ℕ)
56	55	adantl 482	. . . . . . . . 9 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → 𝑛 ∈ ℕ)
57		nnm1nn0 11334	. . . . . . . . 9 ⊢ (𝑛 ∈ ℕ → (𝑛 − 1) ∈ ℕ₀)
58	56, 57	syl 17	. . . . . . . 8 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (𝑛 − 1) ∈ ℕ₀)
59	54, 58	expcld 13008	. . . . . . 7 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → (-1↑(𝑛 − 1)) ∈ ℂ)
60	59	adantr 481	. . . . . 6 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (-1↑(𝑛 − 1)) ∈ ℂ)
61		unifi 8255	. . . . . . . . . 10 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → ∪ 𝐴 ∈ Fin)
62	61	ad2antrr 762	. . . . . . . . 9 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ∪ 𝐴 ∈ Fin)
63	56	adantr 481	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝑛 ∈ ℕ)
64	45, 63	eqeltrd 2701	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (#‘𝑠) ∈ ℕ)
65	35	adantr 481	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝐴 ∈ Fin)
66		elrabi 3359	. . . . . . . . . . . . . . . 16 ⊢ (𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} → 𝑠 ∈ 𝒫 𝐴)
67	66	adantl 482	. . . . . . . . . . . . . . 15 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝑠 ∈ 𝒫 𝐴)
68		elpwi 4168	. . . . . . . . . . . . . . 15 ⊢ (𝑠 ∈ 𝒫 𝐴 → 𝑠 ⊆ 𝐴)
69	67, 68	syl 17	. . . . . . . . . . . . . 14 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝑠 ⊆ 𝐴)
70		ssfi 8180	. . . . . . . . . . . . . 14 ⊢ ((𝐴 ∈ Fin ∧ 𝑠 ⊆ 𝐴) → 𝑠 ∈ Fin)
71	65, 69, 70	syl2anc 693	. . . . . . . . . . . . 13 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝑠 ∈ Fin)
72		hashnncl 13157	. . . . . . . . . . . . 13 ⊢ (𝑠 ∈ Fin → ((#‘𝑠) ∈ ℕ ↔ 𝑠 ≠ ∅))
73	71, 72	syl 17	. . . . . . . . . . . 12 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ((#‘𝑠) ∈ ℕ ↔ 𝑠 ≠ ∅))
74	64, 73	mpbid 222	. . . . . . . . . . 11 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → 𝑠 ≠ ∅)
75		intssuni 4499	. . . . . . . . . . 11 ⊢ (𝑠 ≠ ∅ → ∩ 𝑠 ⊆ ∪ 𝑠)
76	74, 75	syl 17	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ∩ 𝑠 ⊆ ∪ 𝑠)
77	69	unissd 4462	. . . . . . . . . 10 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ∪ 𝑠 ⊆ ∪ 𝐴)
78	76, 77	sstrd 3613	. . . . . . . . 9 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ∩ 𝑠 ⊆ ∪ 𝐴)
79		ssfi 8180	. . . . . . . . 9 ⊢ ((∪ 𝐴 ∈ Fin ∧ ∩ 𝑠 ⊆ ∪ 𝐴) → ∩ 𝑠 ∈ Fin)
80	62, 78, 79	syl2anc 693	. . . . . . . 8 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ∩ 𝑠 ∈ Fin)
81		hashcl 13147	. . . . . . . 8 ⊢ (∩ 𝑠 ∈ Fin → (#‘∩ 𝑠) ∈ ℕ₀)
82	80, 81	syl 17	. . . . . . 7 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (#‘∩ 𝑠) ∈ ℕ₀)
83	82	nn0cnd 11353	. . . . . 6 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → (#‘∩ 𝑠) ∈ ℂ)
84	60, 83	mulcld 10060	. . . . 5 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ((-1↑(𝑛 − 1)) · (#‘∩ 𝑠)) ∈ ℂ)
85	52, 84	eqeltrd 2701	. . . 4 ⊢ ((((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛}) → ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) ∈ ℂ)
86	85	anasss 679	. . 3 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ (𝑛 ∈ (1...(#‘𝐴)) ∧ 𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛})) → ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) ∈ ℂ)
87	34, 40, 49, 86	fsumiun 14553	. 2 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → Σ𝑠 ∈ ∪ 𝑛 ∈ (1...(#‘𝐴)){𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = Σ𝑛 ∈ (1...(#‘𝐴))Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)))
88	52	sumeq2dv 14433	. . . 4 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑(𝑛 − 1)) · (#‘∩ 𝑠)))
89	40, 59, 83	fsummulc2 14516	. . . 4 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → ((-1↑(𝑛 − 1)) · Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘∩ 𝑠)) = Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑(𝑛 − 1)) · (#‘∩ 𝑠)))
90	88, 89	eqtr4d 2659	. . 3 ⊢ (((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) ∧ 𝑛 ∈ (1...(#‘𝐴))) → Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = ((-1↑(𝑛 − 1)) · Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘∩ 𝑠)))
91	90	sumeq2dv 14433	. 2 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → Σ𝑛 ∈ (1...(#‘𝐴))Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} ((-1↑((#‘𝑠) − 1)) · (#‘∩ 𝑠)) = Σ𝑛 ∈ (1...(#‘𝐴))((-1↑(𝑛 − 1)) · Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘∩ 𝑠)))
92	33, 87, 91	3eqtrd 2660	1 ⊢ ((𝐴 ∈ Fin ∧ 𝐴 ⊆ Fin) → (#‘∪ 𝐴) = Σ𝑛 ∈ (1...(#‘𝐴))((-1↑(𝑛 − 1)) · Σ𝑠 ∈ {𝑘 ∈ 𝒫 𝐴 ∣ (#‘𝑘) = 𝑛} (#‘∩ 𝑠)))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ≠ wne 2794 ∀wral 2912 ∃wrex 2913 {crab 2916 ∖ cdif 3571 ⊆ wss 3574 ∅c0 3915 𝒫 cpw 4158 {csn 4177 ∪ cuni 4436 ∩ cint 4475 ∪ ciun 4520 Disj wdisj 4620 class class class wbr 4653 ‘cfv 5888 (class class class)co 6650 ≼ cdom 7953 Fincfn 7955 ℂcc 9934 1c1 9937 · cmul 9941 ≤ cle 10075 − cmin 10266 -cneg 10267 ℕcn 11020 ℕ₀cn0 11292 ℤcz 11377 ...cfz 12326 ↑cexp 12860 #chash 13117 Σcsu 14416

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-rep 4771 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 ax-inf2 8538 ax-cnex 9992 ax-resscn 9993 ax-1cn 9994 ax-icn 9995 ax-addcl 9996 ax-addrcl 9997 ax-mulcl 9998 ax-mulrcl 9999 ax-mulcom 10000 ax-addass 10001 ax-mulass 10002 ax-distr 10003 ax-i2m1 10004 ax-1ne0 10005 ax-1rid 10006 ax-rnegex 10007 ax-rrecex 10008 ax-cnre 10009 ax-pre-lttri 10010 ax-pre-lttrn 10011 ax-pre-ltadd 10012 ax-pre-mulgt0 10013 ax-pre-sup 10014

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-tru 1486 df-fal 1489 df-ex 1705 df-nf 1710 df-sb 1881 df-eu 2474 df-mo 2475 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ne 2795 df-nel 2898 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 df-csb 3534 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-pss 3590 df-nul 3916 df-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-tp 4182 df-op 4184 df-uni 4437 df-int 4476 df-iun 4522 df-disj 4621 df-br 4654 df-opab 4713 df-mpt 4730 df-tr 4753 df-id 5024 df-eprel 5029 df-po 5035 df-so 5036 df-fr 5073 df-se 5074 df-we 5075 df-xp 5120 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-res 5126 df-ima 5127 df-pred 5680 df-ord 5726 df-on 5727 df-lim 5728 df-suc 5729 df-iota 5851 df-fun 5890 df-fn 5891 df-f 5892 df-f1 5893 df-fo 5894 df-f1o 5895 df-fv 5896 df-isom 5897 df-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-map 7859 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-sup 8348 df-oi 8415 df-card 8765 df-cda 8990 df-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 df-le 10080 df-sub 10268 df-neg 10269 df-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-n0 11293 df-xnn0 11364 df-z 11378 df-uz 11688 df-rp 11833 df-fz 12327 df-fzo 12466 df-seq 12802 df-exp 12861 df-hash 13118 df-cj 13839 df-re 13840 df-im 13841 df-sqrt 13975 df-abs 13976 df-clim 14219 df-sum 14417

This theorem is referenced by: (None)

W3C validator