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Theorem fisumss 11189
 Description: Change the index set to a subset in a finite sum. (Contributed by Mario Carneiro, 21-Apr-2014.) (Revised by Jim Kingdon, 23-Sep-2022.)
Hypotheses
Ref Expression
fsumss.1 (𝜑𝐴𝐵)
fsumss.2 ((𝜑𝑘𝐴) → 𝐶 ∈ ℂ)
fsumss.3 ((𝜑𝑘 ∈ (𝐵𝐴)) → 𝐶 = 0)
fisumss.adc (𝜑 → ∀𝑗𝐵 DECID 𝑗𝐴)
fsumss.4 (𝜑𝐵 ∈ Fin)
Assertion
Ref Expression
fisumss (𝜑 → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶)
Distinct variable groups:   𝐴,𝑗,𝑘   𝐵,𝑗,𝑘   𝜑,𝑘
Allowed substitution hints:   𝜑(𝑗)   𝐶(𝑗,𝑘)

Proof of Theorem fisumss
Dummy variables 𝑓 𝑢 𝑚 𝑛 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 fsumss.1 . . . . . 6 (𝜑𝐴𝐵)
2 sseq0 3405 . . . . . 6 ((𝐴𝐵𝐵 = ∅) → 𝐴 = ∅)
31, 2sylan 281 . . . . 5 ((𝜑𝐵 = ∅) → 𝐴 = ∅)
43sumeq1d 11163 . . . 4 ((𝜑𝐵 = ∅) → Σ𝑘𝐴 𝐶 = Σ𝑘 ∈ ∅ 𝐶)
5 simpr 109 . . . . 5 ((𝜑𝐵 = ∅) → 𝐵 = ∅)
65sumeq1d 11163 . . . 4 ((𝜑𝐵 = ∅) → Σ𝑘𝐵 𝐶 = Σ𝑘 ∈ ∅ 𝐶)
74, 6eqtr4d 2176 . . 3 ((𝜑𝐵 = ∅) → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶)
87ex 114 . 2 (𝜑 → (𝐵 = ∅ → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶))
9 cnvimass 4906 . . . . . . . . 9 (𝑓𝐴) ⊆ dom 𝑓
10 simprr 522 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)
11 f1of 5371 . . . . . . . . . 10 (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵𝑓:(1...(♯‘𝐵))⟶𝐵)
1210, 11syl 14 . . . . . . . . 9 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝑓:(1...(♯‘𝐵))⟶𝐵)
139, 12fssdm 5291 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑓𝐴) ⊆ (1...(♯‘𝐵)))
1412ffnd 5277 . . . . . . . . . . . 12 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝑓 Fn (1...(♯‘𝐵)))
15 elpreima 5543 . . . . . . . . . . . 12 (𝑓 Fn (1...(♯‘𝐵)) → (𝑛 ∈ (𝑓𝐴) ↔ (𝑛 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑛) ∈ 𝐴)))
1614, 15syl 14 . . . . . . . . . . 11 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑛 ∈ (𝑓𝐴) ↔ (𝑛 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑛) ∈ 𝐴)))
1712ffvelrnda 5559 . . . . . . . . . . . . 13 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ (1...(♯‘𝐵))) → (𝑓𝑛) ∈ 𝐵)
1817ex 114 . . . . . . . . . . . 12 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑛 ∈ (1...(♯‘𝐵)) → (𝑓𝑛) ∈ 𝐵))
1918adantrd 277 . . . . . . . . . . 11 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → ((𝑛 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑛) ∈ 𝐴) → (𝑓𝑛) ∈ 𝐵))
2016, 19sylbid 149 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑛 ∈ (𝑓𝐴) → (𝑓𝑛) ∈ 𝐵))
2120imp 123 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ (𝑓𝐴)) → (𝑓𝑛) ∈ 𝐵)
22 fsumss.2 . . . . . . . . . . . . . . 15 ((𝜑𝑘𝐴) → 𝐶 ∈ ℂ)
2322ex 114 . . . . . . . . . . . . . 14 (𝜑 → (𝑘𝐴𝐶 ∈ ℂ))
2423adantr 274 . . . . . . . . . . . . 13 ((𝜑𝑘𝐵) → (𝑘𝐴𝐶 ∈ ℂ))
25 eldif 3081 . . . . . . . . . . . . . . 15 (𝑘 ∈ (𝐵𝐴) ↔ (𝑘𝐵 ∧ ¬ 𝑘𝐴))
26 fsumss.3 . . . . . . . . . . . . . . . 16 ((𝜑𝑘 ∈ (𝐵𝐴)) → 𝐶 = 0)
27 0cn 7778 . . . . . . . . . . . . . . . 16 0 ∈ ℂ
2826, 27eqeltrdi 2231 . . . . . . . . . . . . . . 15 ((𝜑𝑘 ∈ (𝐵𝐴)) → 𝐶 ∈ ℂ)
2925, 28sylan2br 286 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑘𝐵 ∧ ¬ 𝑘𝐴)) → 𝐶 ∈ ℂ)
3029expr 373 . . . . . . . . . . . . 13 ((𝜑𝑘𝐵) → (¬ 𝑘𝐴𝐶 ∈ ℂ))
31 eleq1w 2201 . . . . . . . . . . . . . . . 16 (𝑗 = 𝑘 → (𝑗𝐴𝑘𝐴))
3231dcbid 824 . . . . . . . . . . . . . . 15 (𝑗 = 𝑘 → (DECID 𝑗𝐴DECID 𝑘𝐴))
33 fisumss.adc . . . . . . . . . . . . . . . 16 (𝜑 → ∀𝑗𝐵 DECID 𝑗𝐴)
3433adantr 274 . . . . . . . . . . . . . . 15 ((𝜑𝑘𝐵) → ∀𝑗𝐵 DECID 𝑗𝐴)
35 simpr 109 . . . . . . . . . . . . . . 15 ((𝜑𝑘𝐵) → 𝑘𝐵)
3632, 34, 35rspcdva 2795 . . . . . . . . . . . . . 14 ((𝜑𝑘𝐵) → DECID 𝑘𝐴)
37 exmiddc 822 . . . . . . . . . . . . . 14 (DECID 𝑘𝐴 → (𝑘𝐴 ∨ ¬ 𝑘𝐴))
3836, 37syl 14 . . . . . . . . . . . . 13 ((𝜑𝑘𝐵) → (𝑘𝐴 ∨ ¬ 𝑘𝐴))
3924, 30, 38mpjaod 708 . . . . . . . . . . . 12 ((𝜑𝑘𝐵) → 𝐶 ∈ ℂ)
4039fmpttd 5579 . . . . . . . . . . 11 (𝜑 → (𝑘𝐵𝐶):𝐵⟶ℂ)
4140adantr 274 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑘𝐵𝐶):𝐵⟶ℂ)
4241ffvelrnda 5559 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ (𝑓𝑛) ∈ 𝐵) → ((𝑘𝐵𝐶)‘(𝑓𝑛)) ∈ ℂ)
4321, 42syldan 280 . . . . . . . 8 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ (𝑓𝐴)) → ((𝑘𝐵𝐶)‘(𝑓𝑛)) ∈ ℂ)
44 eldifi 3199 . . . . . . . . . . . 12 (𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴)) → 𝑛 ∈ (1...(♯‘𝐵)))
4544, 17sylan2 284 . . . . . . . . . . 11 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → (𝑓𝑛) ∈ 𝐵)
46 eldifn 3200 . . . . . . . . . . . . 13 (𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴)) → ¬ 𝑛 ∈ (𝑓𝐴))
4746adantl 275 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ¬ 𝑛 ∈ (𝑓𝐴))
4816adantr 274 . . . . . . . . . . . . 13 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → (𝑛 ∈ (𝑓𝐴) ↔ (𝑛 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑛) ∈ 𝐴)))
4944adantl 275 . . . . . . . . . . . . . 14 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → 𝑛 ∈ (1...(♯‘𝐵)))
5049biantrurd 303 . . . . . . . . . . . . 13 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ((𝑓𝑛) ∈ 𝐴 ↔ (𝑛 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑛) ∈ 𝐴)))
5148, 50bitr4d 190 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → (𝑛 ∈ (𝑓𝐴) ↔ (𝑓𝑛) ∈ 𝐴))
5247, 51mtbid 662 . . . . . . . . . . 11 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ¬ (𝑓𝑛) ∈ 𝐴)
5345, 52eldifd 3082 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → (𝑓𝑛) ∈ (𝐵𝐴))
54 difss 3203 . . . . . . . . . . . . 13 (𝐵𝐴) ⊆ 𝐵
55 resmpt 4871 . . . . . . . . . . . . 13 ((𝐵𝐴) ⊆ 𝐵 → ((𝑘𝐵𝐶) ↾ (𝐵𝐴)) = (𝑘 ∈ (𝐵𝐴) ↦ 𝐶))
5654, 55ax-mp 5 . . . . . . . . . . . 12 ((𝑘𝐵𝐶) ↾ (𝐵𝐴)) = (𝑘 ∈ (𝐵𝐴) ↦ 𝐶)
5756fveq1i 5426 . . . . . . . . . . 11 (((𝑘𝐵𝐶) ↾ (𝐵𝐴))‘(𝑓𝑛)) = ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛))
58 fvres 5449 . . . . . . . . . . 11 ((𝑓𝑛) ∈ (𝐵𝐴) → (((𝑘𝐵𝐶) ↾ (𝐵𝐴))‘(𝑓𝑛)) = ((𝑘𝐵𝐶)‘(𝑓𝑛)))
5957, 58syl5eqr 2187 . . . . . . . . . 10 ((𝑓𝑛) ∈ (𝐵𝐴) → ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) = ((𝑘𝐵𝐶)‘(𝑓𝑛)))
6053, 59syl 14 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) = ((𝑘𝐵𝐶)‘(𝑓𝑛)))
61 c0ex 7780 . . . . . . . . . . . . . . 15 0 ∈ V
6261elsn2 3562 . . . . . . . . . . . . . 14 (𝐶 ∈ {0} ↔ 𝐶 = 0)
6326, 62sylibr 133 . . . . . . . . . . . . 13 ((𝜑𝑘 ∈ (𝐵𝐴)) → 𝐶 ∈ {0})
6463fmpttd 5579 . . . . . . . . . . . 12 (𝜑 → (𝑘 ∈ (𝐵𝐴) ↦ 𝐶):(𝐵𝐴)⟶{0})
6564ad2antrr 480 . . . . . . . . . . 11 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → (𝑘 ∈ (𝐵𝐴) ↦ 𝐶):(𝐵𝐴)⟶{0})
6665, 53ffvelrnd 5560 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) ∈ {0})
67 elsni 3546 . . . . . . . . . 10 (((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) ∈ {0} → ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) = 0)
6866, 67syl 14 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ((𝑘 ∈ (𝐵𝐴) ↦ 𝐶)‘(𝑓𝑛)) = 0)
6960, 68eqtr3d 2175 . . . . . . . 8 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ ((1...(♯‘𝐵)) ∖ (𝑓𝐴))) → ((𝑘𝐵𝐶)‘(𝑓𝑛)) = 0)
70 eleq1 2203 . . . . . . . . . . . . 13 (𝑗 = (𝑓𝑢) → (𝑗𝐴 ↔ (𝑓𝑢) ∈ 𝐴))
7170dcbid 824 . . . . . . . . . . . 12 (𝑗 = (𝑓𝑢) → (DECID 𝑗𝐴DECID (𝑓𝑢) ∈ 𝐴))
7233ad3antrrr 484 . . . . . . . . . . . 12 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → ∀𝑗𝐵 DECID 𝑗𝐴)
7312ad2antrr 480 . . . . . . . . . . . . 13 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → 𝑓:(1...(♯‘𝐵))⟶𝐵)
74 simpr 109 . . . . . . . . . . . . 13 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → 𝑢 ∈ (1...(♯‘𝐵)))
7573, 74ffvelrnd 5560 . . . . . . . . . . . 12 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → (𝑓𝑢) ∈ 𝐵)
7671, 72, 75rspcdva 2795 . . . . . . . . . . 11 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → DECID (𝑓𝑢) ∈ 𝐴)
7710ad2antrr 480 . . . . . . . . . . . . . 14 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)
78 f1ofun 5373 . . . . . . . . . . . . . 14 (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵 → Fun 𝑓)
7977, 78syl 14 . . . . . . . . . . . . 13 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → Fun 𝑓)
80 f1odm 5375 . . . . . . . . . . . . . . 15 (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵 → dom 𝑓 = (1...(♯‘𝐵)))
8177, 80syl 14 . . . . . . . . . . . . . 14 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → dom 𝑓 = (1...(♯‘𝐵)))
8274, 81eleqtrrd 2220 . . . . . . . . . . . . 13 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → 𝑢 ∈ dom 𝑓)
83 fvimacnv 5539 . . . . . . . . . . . . 13 ((Fun 𝑓𝑢 ∈ dom 𝑓) → ((𝑓𝑢) ∈ 𝐴𝑢 ∈ (𝑓𝐴)))
8479, 82, 83syl2anc 409 . . . . . . . . . . . 12 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → ((𝑓𝑢) ∈ 𝐴𝑢 ∈ (𝑓𝐴)))
8584dcbid 824 . . . . . . . . . . 11 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → (DECID (𝑓𝑢) ∈ 𝐴DECID 𝑢 ∈ (𝑓𝐴)))
8676, 85mpbid 146 . . . . . . . . . 10 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ 𝑢 ∈ (1...(♯‘𝐵))) → DECID 𝑢 ∈ (𝑓𝐴))
87 elpreima 5543 . . . . . . . . . . . . . . . . 17 (𝑓 Fn (1...(♯‘𝐵)) → (𝑢 ∈ (𝑓𝐴) ↔ (𝑢 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑢) ∈ 𝐴)))
88 simpl 108 . . . . . . . . . . . . . . . . 17 ((𝑢 ∈ (1...(♯‘𝐵)) ∧ (𝑓𝑢) ∈ 𝐴) → 𝑢 ∈ (1...(♯‘𝐵)))
8987, 88syl6bi 162 . . . . . . . . . . . . . . . 16 (𝑓 Fn (1...(♯‘𝐵)) → (𝑢 ∈ (𝑓𝐴) → 𝑢 ∈ (1...(♯‘𝐵))))
9089con3d 621 . . . . . . . . . . . . . . 15 (𝑓 Fn (1...(♯‘𝐵)) → (¬ 𝑢 ∈ (1...(♯‘𝐵)) → ¬ 𝑢 ∈ (𝑓𝐴)))
9114, 90syl 14 . . . . . . . . . . . . . 14 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (¬ 𝑢 ∈ (1...(♯‘𝐵)) → ¬ 𝑢 ∈ (𝑓𝐴)))
9291adantr 274 . . . . . . . . . . . . 13 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → (¬ 𝑢 ∈ (1...(♯‘𝐵)) → ¬ 𝑢 ∈ (𝑓𝐴)))
9392imp 123 . . . . . . . . . . . 12 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ ¬ 𝑢 ∈ (1...(♯‘𝐵))) → ¬ 𝑢 ∈ (𝑓𝐴))
9493olcd 724 . . . . . . . . . . 11 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ ¬ 𝑢 ∈ (1...(♯‘𝐵))) → (𝑢 ∈ (𝑓𝐴) ∨ ¬ 𝑢 ∈ (𝑓𝐴)))
95 df-dc 821 . . . . . . . . . . 11 (DECID 𝑢 ∈ (𝑓𝐴) ↔ (𝑢 ∈ (𝑓𝐴) ∨ ¬ 𝑢 ∈ (𝑓𝐴)))
9694, 95sylibr 133 . . . . . . . . . 10 ((((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) ∧ ¬ 𝑢 ∈ (1...(♯‘𝐵))) → DECID 𝑢 ∈ (𝑓𝐴))
97 eluzelz 9355 . . . . . . . . . . . . 13 (𝑢 ∈ (ℤ‘1) → 𝑢 ∈ ℤ)
9897adantl 275 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → 𝑢 ∈ ℤ)
99 1zzd 9101 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → 1 ∈ ℤ)
100 simplrl 525 . . . . . . . . . . . . 13 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → (♯‘𝐵) ∈ ℕ)
101100nnzd 9192 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → (♯‘𝐵) ∈ ℤ)
102 fzdcel 9847 . . . . . . . . . . . 12 ((𝑢 ∈ ℤ ∧ 1 ∈ ℤ ∧ (♯‘𝐵) ∈ ℤ) → DECID 𝑢 ∈ (1...(♯‘𝐵)))
10398, 99, 101, 102syl3anc 1217 . . . . . . . . . . 11 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → DECID 𝑢 ∈ (1...(♯‘𝐵)))
104 exmiddc 822 . . . . . . . . . . 11 (DECID 𝑢 ∈ (1...(♯‘𝐵)) → (𝑢 ∈ (1...(♯‘𝐵)) ∨ ¬ 𝑢 ∈ (1...(♯‘𝐵))))
105103, 104syl 14 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → (𝑢 ∈ (1...(♯‘𝐵)) ∨ ¬ 𝑢 ∈ (1...(♯‘𝐵))))
10686, 96, 105mpjaodan 788 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑢 ∈ (ℤ‘1)) → DECID 𝑢 ∈ (𝑓𝐴))
107106ralrimiva 2506 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → ∀𝑢 ∈ (ℤ‘1)DECID 𝑢 ∈ (𝑓𝐴))
108 1zzd 9101 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 1 ∈ ℤ)
109 fzssuz 9872 . . . . . . . . 9 (1...(♯‘𝐵)) ⊆ (ℤ‘1)
110109a1i 9 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (1...(♯‘𝐵)) ⊆ (ℤ‘1))
111103ralrimiva 2506 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → ∀𝑢 ∈ (ℤ‘1)DECID 𝑢 ∈ (1...(♯‘𝐵)))
11213, 43, 69, 107, 108, 110, 111isumss 11188 . . . . . . 7 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑛 ∈ (𝑓𝐴)((𝑘𝐵𝐶)‘(𝑓𝑛)) = Σ𝑛 ∈ (1...(♯‘𝐵))((𝑘𝐵𝐶)‘(𝑓𝑛)))
1131ad2antrr 480 . . . . . . . . . . . 12 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → 𝐴𝐵)
114113resmptd 4874 . . . . . . . . . . 11 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → ((𝑘𝐵𝐶) ↾ 𝐴) = (𝑘𝐴𝐶))
115114fveq1d 5427 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → (((𝑘𝐵𝐶) ↾ 𝐴)‘𝑚) = ((𝑘𝐴𝐶)‘𝑚))
116 fvres 5449 . . . . . . . . . . 11 (𝑚𝐴 → (((𝑘𝐵𝐶) ↾ 𝐴)‘𝑚) = ((𝑘𝐵𝐶)‘𝑚))
117116adantl 275 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → (((𝑘𝐵𝐶) ↾ 𝐴)‘𝑚) = ((𝑘𝐵𝐶)‘𝑚))
118115, 117eqtr3d 2175 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → ((𝑘𝐴𝐶)‘𝑚) = ((𝑘𝐵𝐶)‘𝑚))
119118sumeq2dv 11165 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑚𝐴 ((𝑘𝐵𝐶)‘𝑚))
120 fveq2 5425 . . . . . . . . 9 (𝑚 = (𝑓𝑛) → ((𝑘𝐵𝐶)‘𝑚) = ((𝑘𝐵𝐶)‘(𝑓𝑛)))
1211adantr 274 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝐴𝐵)
122 fsumss.4 . . . . . . . . . . . 12 (𝜑𝐵 ∈ Fin)
123 ssfidc 6827 . . . . . . . . . . . 12 ((𝐵 ∈ Fin ∧ 𝐴𝐵 ∧ ∀𝑗𝐵 DECID 𝑗𝐴) → 𝐴 ∈ Fin)
124122, 1, 33, 123syl3anc 1217 . . . . . . . . . . 11 (𝜑𝐴 ∈ Fin)
125124adantr 274 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝐴 ∈ Fin)
126121, 10, 125preimaf1ofi 6843 . . . . . . . . 9 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑓𝐴) ∈ Fin)
127 f1of1 5370 . . . . . . . . . . . 12 (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵𝑓:(1...(♯‘𝐵))–1-1𝐵)
12810, 127syl 14 . . . . . . . . . . 11 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝑓:(1...(♯‘𝐵))–1-1𝐵)
129 f1ores 5386 . . . . . . . . . . 11 ((𝑓:(1...(♯‘𝐵))–1-1𝐵 ∧ (𝑓𝐴) ⊆ (1...(♯‘𝐵))) → (𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto→(𝑓 “ (𝑓𝐴)))
130128, 13, 129syl2anc 409 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto→(𝑓 “ (𝑓𝐴)))
131 f1ofo 5378 . . . . . . . . . . . . 13 (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵𝑓:(1...(♯‘𝐵))–onto𝐵)
13210, 131syl 14 . . . . . . . . . . . 12 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → 𝑓:(1...(♯‘𝐵))–onto𝐵)
133 foimacnv 5389 . . . . . . . . . . . 12 ((𝑓:(1...(♯‘𝐵))–onto𝐵𝐴𝐵) → (𝑓 “ (𝑓𝐴)) = 𝐴)
134132, 121, 133syl2anc 409 . . . . . . . . . . 11 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑓 “ (𝑓𝐴)) = 𝐴)
135 f1oeq3 5362 . . . . . . . . . . 11 ((𝑓 “ (𝑓𝐴)) = 𝐴 → ((𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto→(𝑓 “ (𝑓𝐴)) ↔ (𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto𝐴))
136134, 135syl 14 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → ((𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto→(𝑓 “ (𝑓𝐴)) ↔ (𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto𝐴))
137130, 136mpbid 146 . . . . . . . . 9 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (𝑓 ↾ (𝑓𝐴)):(𝑓𝐴)–1-1-onto𝐴)
138 fvres 5449 . . . . . . . . . 10 (𝑛 ∈ (𝑓𝐴) → ((𝑓 ↾ (𝑓𝐴))‘𝑛) = (𝑓𝑛))
139138adantl 275 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ (𝑓𝐴)) → ((𝑓 ↾ (𝑓𝐴))‘𝑛) = (𝑓𝑛))
140121sselda 3098 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → 𝑚𝐵)
14141ffvelrnda 5559 . . . . . . . . . 10 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐵) → ((𝑘𝐵𝐶)‘𝑚) ∈ ℂ)
142140, 141syldan 280 . . . . . . . . 9 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑚𝐴) → ((𝑘𝐵𝐶)‘𝑚) ∈ ℂ)
143120, 126, 137, 139, 142fsumf1o 11187 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐴 ((𝑘𝐵𝐶)‘𝑚) = Σ𝑛 ∈ (𝑓𝐴)((𝑘𝐵𝐶)‘(𝑓𝑛)))
144119, 143eqtrd 2173 . . . . . . 7 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑛 ∈ (𝑓𝐴)((𝑘𝐵𝐶)‘(𝑓𝑛)))
145 simprl 521 . . . . . . . . . 10 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (♯‘𝐵) ∈ ℕ)
146145nnzd 9192 . . . . . . . . 9 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (♯‘𝐵) ∈ ℤ)
147108, 146fzfigd 10231 . . . . . . . 8 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → (1...(♯‘𝐵)) ∈ Fin)
148 eqidd 2141 . . . . . . . 8 (((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) ∧ 𝑛 ∈ (1...(♯‘𝐵))) → (𝑓𝑛) = (𝑓𝑛))
149120, 147, 10, 148, 141fsumf1o 11187 . . . . . . 7 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐵 ((𝑘𝐵𝐶)‘𝑚) = Σ𝑛 ∈ (1...(♯‘𝐵))((𝑘𝐵𝐶)‘(𝑓𝑛)))
150112, 144, 1493eqtr4d 2183 . . . . . 6 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑚𝐵 ((𝑘𝐵𝐶)‘𝑚))
15122ralrimiva 2506 . . . . . . . 8 (𝜑 → ∀𝑘𝐴 𝐶 ∈ ℂ)
152 sumfct 11171 . . . . . . . 8 (∀𝑘𝐴 𝐶 ∈ ℂ → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑘𝐴 𝐶)
153151, 152syl 14 . . . . . . 7 (𝜑 → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑘𝐴 𝐶)
154153adantr 274 . . . . . 6 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐴 ((𝑘𝐴𝐶)‘𝑚) = Σ𝑘𝐴 𝐶)
15522adantlr 469 . . . . . . . . . 10 (((𝜑𝑘𝐵) ∧ 𝑘𝐴) → 𝐶 ∈ ℂ)
156 simpll 519 . . . . . . . . . . . 12 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 𝜑)
157 simplr 520 . . . . . . . . . . . . 13 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 𝑘𝐵)
158 simpr 109 . . . . . . . . . . . . 13 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → ¬ 𝑘𝐴)
159157, 158eldifd 3082 . . . . . . . . . . . 12 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 𝑘 ∈ (𝐵𝐴))
160156, 159, 26syl2anc 409 . . . . . . . . . . 11 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 𝐶 = 0)
161 0cnd 7779 . . . . . . . . . . 11 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 0 ∈ ℂ)
162160, 161eqeltrd 2217 . . . . . . . . . 10 (((𝜑𝑘𝐵) ∧ ¬ 𝑘𝐴) → 𝐶 ∈ ℂ)
163155, 162, 38mpjaodan 788 . . . . . . . . 9 ((𝜑𝑘𝐵) → 𝐶 ∈ ℂ)
164163ralrimiva 2506 . . . . . . . 8 (𝜑 → ∀𝑘𝐵 𝐶 ∈ ℂ)
165 sumfct 11171 . . . . . . . 8 (∀𝑘𝐵 𝐶 ∈ ℂ → Σ𝑚𝐵 ((𝑘𝐵𝐶)‘𝑚) = Σ𝑘𝐵 𝐶)
166164, 165syl 14 . . . . . . 7 (𝜑 → Σ𝑚𝐵 ((𝑘𝐵𝐶)‘𝑚) = Σ𝑘𝐵 𝐶)
167166adantr 274 . . . . . 6 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑚𝐵 ((𝑘𝐵𝐶)‘𝑚) = Σ𝑘𝐵 𝐶)
168150, 154, 1673eqtr3d 2181 . . . . 5 ((𝜑 ∧ ((♯‘𝐵) ∈ ℕ ∧ 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)) → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶)
169168expr 373 . . . 4 ((𝜑 ∧ (♯‘𝐵) ∈ ℕ) → (𝑓:(1...(♯‘𝐵))–1-1-onto𝐵 → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶))
170169exlimdv 1792 . . 3 ((𝜑 ∧ (♯‘𝐵) ∈ ℕ) → (∃𝑓 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵 → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶))
171170expimpd 361 . 2 (𝜑 → (((♯‘𝐵) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵) → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶))
172 fz1f1o 11172 . . 3 (𝐵 ∈ Fin → (𝐵 = ∅ ∨ ((♯‘𝐵) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)))
173122, 172syl 14 . 2 (𝜑 → (𝐵 = ∅ ∨ ((♯‘𝐵) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝐵))–1-1-onto𝐵)))
1748, 171, 173mpjaod 708 1 (𝜑 → Σ𝑘𝐴 𝐶 = Σ𝑘𝐵 𝐶)
 Colors of variables: wff set class Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 103   ↔ wb 104   ∨ wo 698  DECID wdc 820   = wceq 1332  ∃wex 1469   ∈ wcel 1481  ∀wral 2417   ∖ cdif 3069   ⊆ wss 3072  ∅c0 3364  {csn 3528   ↦ cmpt 3993  ◡ccnv 4542  dom cdm 4543   ↾ cres 4545   “ cima 4546  Fun wfun 5121   Fn wfn 5122  ⟶wf 5123  –1-1→wf1 5124  –onto→wfo 5125  –1-1-onto→wf1o 5126  ‘cfv 5127  (class class class)co 5778  Fincfn 6638  ℂcc 7638  0cc0 7640  1c1 7641  ℕcn 8740  ℤcz 9074  ℤ≥cuz 9346  ...cfz 9817  ♯chash 10549  Σcsu 11150 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 604  ax-in2 605  ax-io 699  ax-5 1424  ax-7 1425  ax-gen 1426  ax-ie1 1470  ax-ie2 1471  ax-8 1483  ax-10 1484  ax-11 1485  ax-i12 1486  ax-bndl 1487  ax-4 1488  ax-13 1492  ax-14 1493  ax-17 1507  ax-i9 1511  ax-ial 1515  ax-i5r 1516  ax-ext 2122  ax-coll 4047  ax-sep 4050  ax-nul 4058  ax-pow 4102  ax-pr 4135  ax-un 4359  ax-setind 4456  ax-iinf 4506  ax-cnex 7731  ax-resscn 7732  ax-1cn 7733  ax-1re 7734  ax-icn 7735  ax-addcl 7736  ax-addrcl 7737  ax-mulcl 7738  ax-mulrcl 7739  ax-addcom 7740  ax-mulcom 7741  ax-addass 7742  ax-mulass 7743  ax-distr 7744  ax-i2m1 7745  ax-0lt1 7746  ax-1rid 7747  ax-0id 7748  ax-rnegex 7749  ax-precex 7750  ax-cnre 7751  ax-pre-ltirr 7752  ax-pre-ltwlin 7753  ax-pre-lttrn 7754  ax-pre-apti 7755  ax-pre-ltadd 7756  ax-pre-mulgt0 7757  ax-pre-mulext 7758  ax-arch 7759  ax-caucvg 7760 This theorem depends on definitions:  df-bi 116  df-dc 821  df-3or 964  df-3an 965  df-tru 1335  df-fal 1338  df-nf 1438  df-sb 1737  df-eu 2003  df-mo 2004  df-clab 2127  df-cleq 2133  df-clel 2136  df-nfc 2271  df-ne 2310  df-nel 2405  df-ral 2422  df-rex 2423  df-reu 2424  df-rmo 2425  df-rab 2426  df-v 2689  df-sbc 2911  df-csb 3005  df-dif 3074  df-un 3076  df-in 3078  df-ss 3085  df-nul 3365  df-if 3476  df-pw 3513  df-sn 3534  df-pr 3535  df-op 3537  df-uni 3741  df-int 3776  df-iun 3819  df-br 3934  df-opab 3994  df-mpt 3995  df-tr 4031  df-id 4219  df-po 4222  df-iso 4223  df-iord 4292  df-on 4294  df-ilim 4295  df-suc 4297  df-iom 4509  df-xp 4549  df-rel 4550  df-cnv 4551  df-co 4552  df-dm 4553  df-rn 4554  df-res 4555  df-ima 4556  df-iota 5092  df-fun 5129  df-fn 5130  df-f 5131  df-f1 5132  df-fo 5133  df-f1o 5134  df-fv 5135  df-isom 5136  df-riota 5734  df-ov 5781  df-oprab 5782  df-mpo 5783  df-1st 6042  df-2nd 6043  df-recs 6206  df-irdg 6271  df-frec 6292  df-1o 6317  df-oadd 6321  df-er 6433  df-en 6639  df-dom 6640  df-fin 6641  df-pnf 7822  df-mnf 7823  df-xr 7824  df-ltxr 7825  df-le 7826  df-sub 7955  df-neg 7956  df-reap 8357  df-ap 8364  df-div 8453  df-inn 8741  df-2 8799  df-3 8800  df-4 8801  df-n0 8998  df-z 9075  df-uz 9347  df-q 9435  df-rp 9467  df-fz 9818  df-fzo 9947  df-seqfrec 10246  df-exp 10320  df-ihash 10550  df-cj 10642  df-re 10643  df-im 10644  df-rsqrt 10798  df-abs 10799  df-clim 11076  df-sumdc 11151 This theorem is referenced by:  isumss2  11190
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