sge0ltfirp - Mathbox for Glauco Siliprandi

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Theorem sge0ltfirp 42689

Description: If the sum of nonnegative extended reals is real, then it can be approximated from below by finite subsums. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

**Hypotheses**
Ref	Expression
sge0ltfirp.x	⊢ (𝜑 → 𝑋 ∈ 𝑉)
sge0ltfirp.f	⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞))
sge0ltfirp.y	⊢ (𝜑 → 𝑌 ∈ ℝ⁺)
sge0ltfirp.re	⊢ (𝜑 → (Σ^{^}‘𝐹) ∈ ℝ)

**Assertion**
Ref	Expression
sge0ltfirp	⊢ (𝜑 → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))

Distinct variable groups: 𝑥,𝐹 𝑥,𝑋 𝑥,𝑌 𝜑,𝑥 Allowed substitution hint: 𝑉(𝑥)

Proof of Theorem sge0ltfirp Dummy variables 𝑤 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		sge0ltfirp.f	. . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞))
2		sge0ltfirp.x	. . . . . 6 ⊢ (𝜑 → 𝑋 ∈ 𝑉)
3		sge0ltfirp.re	. . . . . 6 ⊢ (𝜑 → (Σ^{^}‘𝐹) ∈ ℝ)
4	2, 1, 3	sge0rern 42677	. . . . 5 ⊢ (𝜑 → ¬ +∞ ∈ ran 𝐹)
5	1, 4	fge0iccico 42659	. . . 4 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,)+∞))
6	5	sge0rnre 42653	. . 3 ⊢ (𝜑 → ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ⊆ ℝ)
7		sge0rnn0 42657	. . . 4 ⊢ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ≠ ∅
8	7	a1i 11	. . 3 ⊢ (𝜑 → ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ≠ ∅)
9	2, 1, 3	sge0rnbnd 42682	. . 3 ⊢ (𝜑 → ∃𝑧 ∈ ℝ ∀𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))𝑤 ≤ 𝑧)
10		sge0ltfirp.y	. . 3 ⊢ (𝜑 → 𝑌 ∈ ℝ⁺)
11	6, 8, 9, 10	suprltrp 41603	. 2 ⊢ (𝜑 → ∃𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤)
12		nfv 1915	. . 3 ⊢ Ⅎ𝑤𝜑
13		nfv 1915	. . 3 ⊢ Ⅎ𝑤∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌)
14		simp1 1132	. . . . 5 ⊢ ((𝜑 ∧ 𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → 𝜑)
15		vex 3499	. . . . . . . . . 10 ⊢ 𝑤 ∈ V
16		eqid 2823	. . . . . . . . . . 11 ⊢ (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) = (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
17	16	elrnmpt 5830	. . . . . . . . . 10 ⊢ (𝑤 ∈ V → (𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ↔ ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)))
18	15, 17	ax-mp 5	. . . . . . . . 9 ⊢ (𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ↔ ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
19	18	biimpi 218	. . . . . . . 8 ⊢ (𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
20	19	adantr 483	. . . . . . 7 ⊢ ((𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
21		nfmpt1 5166	. . . . . . . . . . . . 13 ⊢ Ⅎ𝑥(𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
22	21	nfrn 5826	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
23		nfcv 2979	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥ℝ
24		nfcv 2979	. . . . . . . . . . . 12 ⊢ Ⅎ𝑥 <
25	22, 23, 24	nfsup 8917	. . . . . . . . . . 11 ⊢ Ⅎ𝑥sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < )
26		nfcv 2979	. . . . . . . . . . 11 ⊢ Ⅎ𝑥 −
27		nfcv 2979	. . . . . . . . . . 11 ⊢ Ⅎ𝑥𝑌
28	25, 26, 27	nfov 7188	. . . . . . . . . 10 ⊢ Ⅎ𝑥(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌)
29		nfcv 2979	. . . . . . . . . 10 ⊢ Ⅎ𝑥𝑤
30	28, 24, 29	nfbr 5115	. . . . . . . . 9 ⊢ Ⅎ𝑥(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤
31		simpl 485	. . . . . . . . . . . 12 ⊢ (((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 ∧ 𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤)
32		simpr 487	. . . . . . . . . . . 12 ⊢ (((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 ∧ 𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → 𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
33	31, 32	breqtrd 5094	. . . . . . . . . . 11 ⊢ (((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 ∧ 𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
34	33	ex 415	. . . . . . . . . 10 ⊢ ((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 → (𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)))
35	34	a1d 25	. . . . . . . . 9 ⊢ ((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 → (𝑥 ∈ (𝒫 𝑋 ∩ Fin) → (𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))))
36	30, 35	reximdai 3313	. . . . . . . 8 ⊢ ((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 → (∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)))
37	36	adantl 484	. . . . . . 7 ⊢ ((𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → (∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)𝑤 = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)))
38	20, 37	mpd 15	. . . . . 6 ⊢ ((𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
39	38	3adant1 1126	. . . . 5 ⊢ ((𝜑 ∧ 𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
40		simpl 485	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)))
41	2, 1, 3	sge0supre 42678	. . . . . . . . . . . . 13 ⊢ (𝜑 → (Σ^{^}‘𝐹) = sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ))
42	41	oveq1d 7173	. . . . . . . . . . . 12 ⊢ (𝜑 → ((Σ^{^}‘𝐹) − 𝑌) = (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌))
43	42	adantr 483	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ((Σ^{^}‘𝐹) − 𝑌) = (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌))
44		simpr 487	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
45	43, 44	eqbrtrd 5090	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
46	45	adantlr 713	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
47		simpr 487	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
48	3	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → (Σ^{^}‘𝐹) ∈ ℝ)
49	10	rpred 12434	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑌 ∈ ℝ)
50	49	adantr 483	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → 𝑌 ∈ ℝ)
51		elinel2 4175	. . . . . . . . . . . . . . 15 ⊢ (𝑥 ∈ (𝒫 𝑋 ∩ Fin) → 𝑥 ∈ Fin)
52	51	adantl 484	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → 𝑥 ∈ Fin)
53		rge0ssre 12847	. . . . . . . . . . . . . . 15 ⊢ (0[,)+∞) ⊆ ℝ
54	5	adantr 483	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → 𝐹:𝑋⟶(0[,)+∞))
55	54	adantr 483	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ 𝑦 ∈ 𝑥) → 𝐹:𝑋⟶(0[,)+∞))
56		elpwinss 41318	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑥 ∈ (𝒫 𝑋 ∩ Fin) → 𝑥 ⊆ 𝑋)
57	56	adantl 484	. . . . . . . . . . . . . . . . 17 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → 𝑥 ⊆ 𝑋)
58	57	sselda 3969	. . . . . . . . . . . . . . . 16 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ 𝑦 ∈ 𝑥) → 𝑦 ∈ 𝑋)
59	55, 58	ffvelrnd 6854	. . . . . . . . . . . . . . 15 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ 𝑦 ∈ 𝑥) → (𝐹‘𝑦) ∈ (0[,)+∞))
60	53, 59	sseldi 3967	. . . . . . . . . . . . . 14 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ 𝑦 ∈ 𝑥) → (𝐹‘𝑦) ∈ ℝ)
61	52, 60	fsumrecl 15093	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) ∈ ℝ)
62	48, 50, 61	ltsubaddd 11238	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → (((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) ↔ (Σ^{^}‘𝐹) < (Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) + 𝑌)))
63	62	adantr 483	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) ↔ (Σ^{^}‘𝐹) < (Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) + 𝑌)))
64	47, 63	mpbid 234	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (Σ^{^}‘𝐹) < (Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) + 𝑌))
65	54, 57	fssresd 6547	. . . . . . . . . . . . . 14 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → (𝐹 ↾ 𝑥):𝑥⟶(0[,)+∞))
66	52, 65	sge0fsum 42676	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → (Σ^{^}‘(𝐹 ↾ 𝑥)) = Σ𝑦 ∈ 𝑥 ((𝐹 ↾ 𝑥)‘𝑦))
67		fvres 6691	. . . . . . . . . . . . . . 15 ⊢ (𝑦 ∈ 𝑥 → ((𝐹 ↾ 𝑥)‘𝑦) = (𝐹‘𝑦))
68	67	sumeq2i 15058	. . . . . . . . . . . . . 14 ⊢ Σ𝑦 ∈ 𝑥 ((𝐹 ↾ 𝑥)‘𝑦) = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)
69	68	a1i 11	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → Σ𝑦 ∈ 𝑥 ((𝐹 ↾ 𝑥)‘𝑦) = Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))
70	66, 69	eqtr2d 2859	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) = (Σ^{^}‘(𝐹 ↾ 𝑥)))
71	70	oveq1d 7173	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → (Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) + 𝑌) = ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
72	71	adantr 483	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) + 𝑌) = ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
73	64, 72	breqtrd 5094	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ ((Σ^{^}‘𝐹) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
74	40, 46, 73	syl2anc 586	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → (Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
75	74	ex 415	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ (𝒫 𝑋 ∩ Fin)) → ((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → (Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌)))
76	75	reximdva 3276	. . . . . 6 ⊢ (𝜑 → (∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌)))
77	76	imp 409	. . . . 5 ⊢ ((𝜑 ∧ ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
78	14, 39, 77	syl2anc 586	. . . 4 ⊢ ((𝜑 ∧ 𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) ∧ (sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤) → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))
79	78	3exp 1115	. . 3 ⊢ (𝜑 → (𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)) → ((sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))))
80	12, 13, 79	rexlimd 3319	. 2 ⊢ (𝜑 → (∃𝑤 ∈ ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦))(sup(ran (𝑥 ∈ (𝒫 𝑋 ∩ Fin) ↦ Σ𝑦 ∈ 𝑥 (𝐹‘𝑦)), ℝ, < ) − 𝑌) < 𝑤 → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌)))
81	11, 80	mpd 15	1 ⊢ (𝜑 → ∃𝑥 ∈ (𝒫 𝑋 ∩ Fin)(Σ^{^}‘𝐹) < ((Σ^{^}‘(𝐹 ↾ 𝑥)) + 𝑌))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 ≠ wne 3018 ∃wrex 3141 Vcvv 3496 ∩ cin 3937 ⊆ wss 3938 ∅c0 4293 𝒫 cpw 4541 class class class wbr 5068 ↦ cmpt 5148 ran crn 5558 ↾ cres 5559 ⟶wf 6353 ‘cfv 6357 (class class class)co 7158 Fincfn 8511 supcsup 8906 ℝcr 10538 0cc0 10539 + caddc 10542 +∞cpnf 10674 < clt 10677 − cmin 10872 ℝ⁺crp 12392 [,)cico 12743 [,]cicc 12744 Σcsu 15044 Σ^{^}csumge0 42651

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-rep 5192 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-inf2 9106 ax-cnex 10595 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 ax-pre-sup 10617

This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-fal 1550 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-int 4879 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-se 5517 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-isom 6366 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-1st 7691 df-2nd 7692 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-1o 8104 df-oadd 8108 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-fin 8515 df-sup 8908 df-oi 8976 df-card 9370 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-n0 11901 df-z 11985 df-uz 12247 df-rp 12393 df-ico 12747 df-icc 12748 df-fz 12896 df-fzo 13037 df-seq 13373 df-exp 13433 df-hash 13694 df-cj 14460 df-re 14461 df-im 14462 df-sqrt 14596 df-abs 14597 df-clim 14847 df-sum 15045 df-sumge0 42652

This theorem is referenced by: sge0ltfirpmpt 42697 sge0ltfirpmpt2 42715

W3C validator