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Theorem gsumval3eu 19020
 Description: The group sum as defined in gsumval3a 19019 is uniquely defined. (Contributed by Mario Carneiro, 8-Dec-2014.)
Hypotheses
Ref Expression
gsumval3.b 𝐵 = (Base‘𝐺)
gsumval3.0 0 = (0g𝐺)
gsumval3.p + = (+g𝐺)
gsumval3.z 𝑍 = (Cntz‘𝐺)
gsumval3.g (𝜑𝐺 ∈ Mnd)
gsumval3.a (𝜑𝐴𝑉)
gsumval3.f (𝜑𝐹:𝐴𝐵)
gsumval3.c (𝜑 → ran 𝐹 ⊆ (𝑍‘ran 𝐹))
gsumval3a.t (𝜑𝑊 ∈ Fin)
gsumval3a.n (𝜑𝑊 ≠ ∅)
gsumval3a.s (𝜑𝑊𝐴)
Assertion
Ref Expression
gsumval3eu (𝜑 → ∃!𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))))
Distinct variable groups:   𝑥,𝑓, +   𝐴,𝑓,𝑥   𝜑,𝑓,𝑥   𝑥, 0   𝑓,𝐺,𝑥   𝑥,𝑉   𝐵,𝑓,𝑥   𝑓,𝐹,𝑥   𝑓,𝑊,𝑥
Allowed substitution hints:   𝑉(𝑓)   0 (𝑓)   𝑍(𝑥,𝑓)

Proof of Theorem gsumval3eu
Dummy variables 𝑔 𝑘 𝑦 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 gsumval3a.n . . . . . 6 (𝜑𝑊 ≠ ∅)
21neneqd 2995 . . . . 5 (𝜑 → ¬ 𝑊 = ∅)
3 gsumval3a.t . . . . . . 7 (𝜑𝑊 ∈ Fin)
4 fz1f1o 15062 . . . . . . 7 (𝑊 ∈ Fin → (𝑊 = ∅ ∨ ((♯‘𝑊) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)))
53, 4syl 17 . . . . . 6 (𝜑 → (𝑊 = ∅ ∨ ((♯‘𝑊) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)))
65ord 861 . . . . 5 (𝜑 → (¬ 𝑊 = ∅ → ((♯‘𝑊) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)))
72, 6mpd 15 . . . 4 (𝜑 → ((♯‘𝑊) ∈ ℕ ∧ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊))
87simprd 499 . . 3 (𝜑 → ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
9 excom 2167 . . . 4 (∃𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑓𝑥(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))))
10 exancom 1862 . . . . . 6 (∃𝑥(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑥(𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊))
11 fvex 6662 . . . . . . 7 (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∈ V
12 biidd 265 . . . . . . 7 (𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) → (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑓:(1...(♯‘𝑊))–1-1-onto𝑊))
1311, 12ceqsexv 3492 . . . . . 6 (∃𝑥(𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊) ↔ 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
1410, 13bitri 278 . . . . 5 (∃𝑥(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
1514exbii 1849 . . . 4 (∃𝑓𝑥(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
169, 15bitri 278 . . 3 (∃𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑓 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
178, 16sylibr 237 . 2 (𝜑 → ∃𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))))
18 exdistrv 1956 . . . 4 (∃𝑓𝑔((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) ↔ (∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))))
19 an4 655 . . . . . 6 (((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊) ∧ (𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) ↔ ((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))))
20 gsumval3.g . . . . . . . . . . 11 (𝜑𝐺 ∈ Mnd)
2120adantr 484 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝐺 ∈ Mnd)
22 gsumval3.b . . . . . . . . . . . 12 𝐵 = (Base‘𝐺)
23 gsumval3.p . . . . . . . . . . . 12 + = (+g𝐺)
2422, 23mndcl 17914 . . . . . . . . . . 11 ((𝐺 ∈ Mnd ∧ 𝑥𝐵𝑦𝐵) → (𝑥 + 𝑦) ∈ 𝐵)
25243expb 1117 . . . . . . . . . 10 ((𝐺 ∈ Mnd ∧ (𝑥𝐵𝑦𝐵)) → (𝑥 + 𝑦) ∈ 𝐵)
2621, 25sylan 583 . . . . . . . . 9 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ (𝑥𝐵𝑦𝐵)) → (𝑥 + 𝑦) ∈ 𝐵)
27 gsumval3.c . . . . . . . . . . . . 13 (𝜑 → ran 𝐹 ⊆ (𝑍‘ran 𝐹))
2827adantr 484 . . . . . . . . . . . 12 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → ran 𝐹 ⊆ (𝑍‘ran 𝐹))
2928sselda 3918 . . . . . . . . . . 11 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑥 ∈ ran 𝐹) → 𝑥 ∈ (𝑍‘ran 𝐹))
3029adantrr 716 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ (𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐹)) → 𝑥 ∈ (𝑍‘ran 𝐹))
31 simprr 772 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ (𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐹)) → 𝑦 ∈ ran 𝐹)
32 gsumval3.z . . . . . . . . . . 11 𝑍 = (Cntz‘𝐺)
3323, 32cntzi 18454 . . . . . . . . . 10 ((𝑥 ∈ (𝑍‘ran 𝐹) ∧ 𝑦 ∈ ran 𝐹) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
3430, 31, 33syl2anc 587 . . . . . . . . 9 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ (𝑥 ∈ ran 𝐹𝑦 ∈ ran 𝐹)) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
3522, 23mndass 17915 . . . . . . . . . 10 ((𝐺 ∈ Mnd ∧ (𝑥𝐵𝑦𝐵𝑧𝐵)) → ((𝑥 + 𝑦) + 𝑧) = (𝑥 + (𝑦 + 𝑧)))
3621, 35sylan 583 . . . . . . . . 9 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ (𝑥𝐵𝑦𝐵𝑧𝐵)) → ((𝑥 + 𝑦) + 𝑧) = (𝑥 + (𝑦 + 𝑧)))
377simpld 498 . . . . . . . . . . 11 (𝜑 → (♯‘𝑊) ∈ ℕ)
3837adantr 484 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → (♯‘𝑊) ∈ ℕ)
39 nnuz 12273 . . . . . . . . . 10 ℕ = (ℤ‘1)
4038, 39eleqtrdi 2903 . . . . . . . . 9 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → (♯‘𝑊) ∈ (ℤ‘1))
41 gsumval3.f . . . . . . . . . . 11 (𝜑𝐹:𝐴𝐵)
4241adantr 484 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝐹:𝐴𝐵)
4342frnd 6498 . . . . . . . . 9 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → ran 𝐹𝐵)
44 simprr 772 . . . . . . . . . . 11 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)
45 f1ocnv 6606 . . . . . . . . . . 11 (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:𝑊1-1-onto→(1...(♯‘𝑊)))
4644, 45syl 17 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑔:𝑊1-1-onto→(1...(♯‘𝑊)))
47 simprl 770 . . . . . . . . . 10 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊)
48 f1oco 6616 . . . . . . . . . 10 ((𝑔:𝑊1-1-onto→(1...(♯‘𝑊)) ∧ 𝑓:(1...(♯‘𝑊))–1-1-onto𝑊) → (𝑔𝑓):(1...(♯‘𝑊))–1-1-onto→(1...(♯‘𝑊)))
4946, 47, 48syl2anc 587 . . . . . . . . 9 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → (𝑔𝑓):(1...(♯‘𝑊))–1-1-onto→(1...(♯‘𝑊)))
50 f1of 6594 . . . . . . . . . . . 12 (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))⟶𝑊)
5144, 50syl 17 . . . . . . . . . . 11 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑔:(1...(♯‘𝑊))⟶𝑊)
52 fvco3 6741 . . . . . . . . . . 11 ((𝑔:(1...(♯‘𝑊))⟶𝑊𝑥 ∈ (1...(♯‘𝑊))) → ((𝐹𝑔)‘𝑥) = (𝐹‘(𝑔𝑥)))
5351, 52sylan 583 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑥 ∈ (1...(♯‘𝑊))) → ((𝐹𝑔)‘𝑥) = (𝐹‘(𝑔𝑥)))
5442ffnd 6492 . . . . . . . . . . 11 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝐹 Fn 𝐴)
55 gsumval3a.s . . . . . . . . . . . . . 14 (𝜑𝑊𝐴)
5655adantr 484 . . . . . . . . . . . . 13 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑊𝐴)
5751, 56fssd 6506 . . . . . . . . . . . 12 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑔:(1...(♯‘𝑊))⟶𝐴)
5857ffvelrnda 6832 . . . . . . . . . . 11 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑥 ∈ (1...(♯‘𝑊))) → (𝑔𝑥) ∈ 𝐴)
59 fnfvelrn 6829 . . . . . . . . . . 11 ((𝐹 Fn 𝐴 ∧ (𝑔𝑥) ∈ 𝐴) → (𝐹‘(𝑔𝑥)) ∈ ran 𝐹)
6054, 58, 59syl2an2r 684 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑥 ∈ (1...(♯‘𝑊))) → (𝐹‘(𝑔𝑥)) ∈ ran 𝐹)
6153, 60eqeltrd 2893 . . . . . . . . 9 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑥 ∈ (1...(♯‘𝑊))) → ((𝐹𝑔)‘𝑥) ∈ ran 𝐹)
62 f1of 6594 . . . . . . . . . . . . . . 15 (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑓:(1...(♯‘𝑊))⟶𝑊)
6347, 62syl 17 . . . . . . . . . . . . . 14 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → 𝑓:(1...(♯‘𝑊))⟶𝑊)
64 fvco3 6741 . . . . . . . . . . . . . 14 ((𝑓:(1...(♯‘𝑊))⟶𝑊𝑘 ∈ (1...(♯‘𝑊))) → ((𝑔𝑓)‘𝑘) = (𝑔‘(𝑓𝑘)))
6563, 64sylan 583 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → ((𝑔𝑓)‘𝑘) = (𝑔‘(𝑓𝑘)))
6665fveq2d 6653 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → (𝑔‘((𝑔𝑓)‘𝑘)) = (𝑔‘(𝑔‘(𝑓𝑘))))
6763ffvelrnda 6832 . . . . . . . . . . . . 13 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → (𝑓𝑘) ∈ 𝑊)
68 f1ocnvfv2 7016 . . . . . . . . . . . . 13 ((𝑔:(1...(♯‘𝑊))–1-1-onto𝑊 ∧ (𝑓𝑘) ∈ 𝑊) → (𝑔‘(𝑔‘(𝑓𝑘))) = (𝑓𝑘))
6944, 67, 68syl2an2r 684 . . . . . . . . . . . 12 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → (𝑔‘(𝑔‘(𝑓𝑘))) = (𝑓𝑘))
7066, 69eqtr2d 2837 . . . . . . . . . . 11 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → (𝑓𝑘) = (𝑔‘((𝑔𝑓)‘𝑘)))
7170fveq2d 6653 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → (𝐹‘(𝑓𝑘)) = (𝐹‘(𝑔‘((𝑔𝑓)‘𝑘))))
72 fvco3 6741 . . . . . . . . . . 11 ((𝑓:(1...(♯‘𝑊))⟶𝑊𝑘 ∈ (1...(♯‘𝑊))) → ((𝐹𝑓)‘𝑘) = (𝐹‘(𝑓𝑘)))
7363, 72sylan 583 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → ((𝐹𝑓)‘𝑘) = (𝐹‘(𝑓𝑘)))
74 f1of 6594 . . . . . . . . . . . . 13 ((𝑔𝑓):(1...(♯‘𝑊))–1-1-onto→(1...(♯‘𝑊)) → (𝑔𝑓):(1...(♯‘𝑊))⟶(1...(♯‘𝑊)))
7549, 74syl 17 . . . . . . . . . . . 12 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → (𝑔𝑓):(1...(♯‘𝑊))⟶(1...(♯‘𝑊)))
7675ffvelrnda 6832 . . . . . . . . . . 11 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → ((𝑔𝑓)‘𝑘) ∈ (1...(♯‘𝑊)))
77 fvco3 6741 . . . . . . . . . . 11 ((𝑔:(1...(♯‘𝑊))⟶𝐴 ∧ ((𝑔𝑓)‘𝑘) ∈ (1...(♯‘𝑊))) → ((𝐹𝑔)‘((𝑔𝑓)‘𝑘)) = (𝐹‘(𝑔‘((𝑔𝑓)‘𝑘))))
7857, 76, 77syl2an2r 684 . . . . . . . . . 10 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → ((𝐹𝑔)‘((𝑔𝑓)‘𝑘)) = (𝐹‘(𝑔‘((𝑔𝑓)‘𝑘))))
7971, 73, 783eqtr4d 2846 . . . . . . . . 9 (((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) ∧ 𝑘 ∈ (1...(♯‘𝑊))) → ((𝐹𝑓)‘𝑘) = ((𝐹𝑔)‘((𝑔𝑓)‘𝑘)))
8026, 34, 36, 40, 43, 49, 61, 79seqf1o 13411 . . . . . . . 8 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))
81 eqeq12 2815 . . . . . . . 8 ((𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊))) → (𝑥 = 𝑦 ↔ (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) = (seq1( + , (𝐹𝑔))‘(♯‘𝑊))))
8280, 81syl5ibrcom 250 . . . . . . 7 ((𝜑 ∧ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊)) → ((𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊))) → 𝑥 = 𝑦))
8382expimpd 457 . . . . . 6 (𝜑 → (((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊) ∧ (𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ∧ 𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦))
8419, 83syl5bir 246 . . . . 5 (𝜑 → (((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦))
8584exlimdvv 1935 . . . 4 (𝜑 → (∃𝑓𝑔((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦))
8618, 85syl5bir 246 . . 3 (𝜑 → ((∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦))
8786alrimivv 1929 . 2 (𝜑 → ∀𝑥𝑦((∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦))
88 eqeq1 2805 . . . . . 6 (𝑥 = 𝑦 → (𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ↔ 𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))))
8988anbi2d 631 . . . . 5 (𝑥 = 𝑦 → ((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)))))
9089exbidv 1922 . . . 4 (𝑥 = 𝑦 → (∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)))))
91 f1oeq1 6583 . . . . . 6 (𝑓 = 𝑔 → (𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑔:(1...(♯‘𝑊))–1-1-onto𝑊))
92 coeq2 5697 . . . . . . . . 9 (𝑓 = 𝑔 → (𝐹𝑓) = (𝐹𝑔))
9392seqeq3d 13376 . . . . . . . 8 (𝑓 = 𝑔 → seq1( + , (𝐹𝑓)) = seq1( + , (𝐹𝑔)))
9493fveq1d 6651 . . . . . . 7 (𝑓 = 𝑔 → (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))
9594eqeq2d 2812 . . . . . 6 (𝑓 = 𝑔 → (𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊)) ↔ 𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊))))
9691, 95anbi12d 633 . . . . 5 (𝑓 = 𝑔 → ((𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ (𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))))
9796cbvexvw 2044 . . . 4 (∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊))))
9890, 97syl6bb 290 . . 3 (𝑥 = 𝑦 → (∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))))
9998eu4 2679 . 2 (∃!𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ↔ (∃𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ ∀𝑥𝑦((∃𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))) ∧ ∃𝑔(𝑔:(1...(♯‘𝑊))–1-1-onto𝑊𝑦 = (seq1( + , (𝐹𝑔))‘(♯‘𝑊)))) → 𝑥 = 𝑦)))
10017, 87, 99sylanbrc 586 1 (𝜑 → ∃!𝑥𝑓(𝑓:(1...(♯‘𝑊))–1-1-onto𝑊𝑥 = (seq1( + , (𝐹𝑓))‘(♯‘𝑊))))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 399   ∨ wo 844   ∧ w3a 1084  ∀wal 1536   = wceq 1538  ∃wex 1781   ∈ wcel 2112  ∃!weu 2631   ≠ wne 2990   ⊆ wss 3884  ∅c0 4246  ◡ccnv 5522  ran crn 5524   ∘ ccom 5527   Fn wfn 6323  ⟶wf 6324  –1-1-onto→wf1o 6327  ‘cfv 6328  (class class class)co 7139  Fincfn 8496  1c1 10531  ℕcn 11629  ℤ≥cuz 12235  ...cfz 12889  seqcseq 13368  ♯chash 13690  Basecbs 16478  +gcplusg 16560  0gc0g 16708  Mndcmnd 17906  Cntzccntz 18440 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2114  ax-9 2122  ax-10 2143  ax-11 2159  ax-12 2176  ax-ext 2773  ax-rep 5157  ax-sep 5170  ax-nul 5177  ax-pow 5234  ax-pr 5298  ax-un 7445  ax-cnex 10586  ax-resscn 10587  ax-1cn 10588  ax-icn 10589  ax-addcl 10590  ax-addrcl 10591  ax-mulcl 10592  ax-mulrcl 10593  ax-mulcom 10594  ax-addass 10595  ax-mulass 10596  ax-distr 10597  ax-i2m1 10598  ax-1ne0 10599  ax-1rid 10600  ax-rnegex 10601  ax-rrecex 10602  ax-cnre 10603  ax-pre-lttri 10604  ax-pre-lttrn 10605  ax-pre-ltadd 10606  ax-pre-mulgt0 10607 This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2601  df-eu 2632  df-clab 2780  df-cleq 2794  df-clel 2873  df-nfc 2941  df-ne 2991  df-nel 3095  df-ral 3114  df-rex 3115  df-reu 3116  df-rab 3118  df-v 3446  df-sbc 3724  df-csb 3832  df-dif 3887  df-un 3889  df-in 3891  df-ss 3901  df-pss 3903  df-nul 4247  df-if 4429  df-pw 4502  df-sn 4529  df-pr 4531  df-tp 4533  df-op 4535  df-uni 4804  df-int 4842  df-iun 4886  df-br 5034  df-opab 5096  df-mpt 5114  df-tr 5140  df-id 5428  df-eprel 5433  df-po 5442  df-so 5443  df-fr 5482  df-we 5484  df-xp 5529  df-rel 5530  df-cnv 5531  df-co 5532  df-dm 5533  df-rn 5534  df-res 5535  df-ima 5536  df-pred 6120  df-ord 6166  df-on 6167  df-lim 6168  df-suc 6169  df-iota 6287  df-fun 6330  df-fn 6331  df-f 6332  df-f1 6333  df-fo 6334  df-f1o 6335  df-fv 6336  df-riota 7097  df-ov 7142  df-oprab 7143  df-mpo 7144  df-om 7565  df-1st 7675  df-2nd 7676  df-wrecs 7934  df-recs 7995  df-rdg 8033  df-1o 8089  df-oadd 8093  df-er 8276  df-en 8497  df-dom 8498  df-sdom 8499  df-fin 8500  df-card 9356  df-pnf 10670  df-mnf 10671  df-xr 10672  df-ltxr 10673  df-le 10674  df-sub 10865  df-neg 10866  df-nn 11630  df-n0 11890  df-z 11974  df-uz 12236  df-fz 12890  df-fzo 13033  df-seq 13369  df-hash 13691  df-mgm 17847  df-sgrp 17896  df-mnd 17907  df-cntz 18442 This theorem is referenced by:  gsumval3lem2  19022
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