Theorem uzwo4 45487

Description: Well-ordering principle: any nonempty subset of an upper set of integers has the least element. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

Hypotheses

Ref	Expression
uzwo4.1	⊢ Ⅎ𝑗𝜓
uzwo4.2	⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜓))

Assertion

Ref	Expression
uzwo4	⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)))

Distinct variable groups:   𝑘,𝑀   𝑆,𝑗,𝑘   𝜑,𝑘

Allowed substitution hints:   𝜑(𝑗)   𝜓(𝑗,𝑘)   𝑀(𝑗)

Proof of Theorem uzwo4

Dummy variable 𝑖 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ssrab2 4021	. . . . . 6 ⊢ {𝑗 ∈ 𝑆 ∣ 𝜑} ⊆ 𝑆
2	1	a1i 11	. . . . 5 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → {𝑗 ∈ 𝑆 ∣ 𝜑} ⊆ 𝑆)
3		id 22	. . . . 5 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → 𝑆 ⊆ (ℤ≥‘𝑀))
4	2, 3	sstrd 3933	. . . 4 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → {𝑗 ∈ 𝑆 ∣ 𝜑} ⊆ (ℤ≥‘𝑀))
5	4	adantr 480	. . 3 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → {𝑗 ∈ 𝑆 ∣ 𝜑} ⊆ (ℤ≥‘𝑀))
6		rabn0 4330	. . . . . 6 ⊢ ({𝑗 ∈ 𝑆 ∣ 𝜑} ≠ ∅ ↔ ∃𝑗 ∈ 𝑆 𝜑)
7	6	bicomi 224	. . . . 5 ⊢ (∃𝑗 ∈ 𝑆 𝜑 ↔ {𝑗 ∈ 𝑆 ∣ 𝜑} ≠ ∅)
8	7	biimpi 216	. . . 4 ⊢ (∃𝑗 ∈ 𝑆 𝜑 → {𝑗 ∈ 𝑆 ∣ 𝜑} ≠ ∅)
9	8	adantl 481	. . 3 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → {𝑗 ∈ 𝑆 ∣ 𝜑} ≠ ∅)
10		uzwo 12825	. . 3 ⊢ (({𝑗 ∈ 𝑆 ∣ 𝜑} ⊆ (ℤ≥‘𝑀) ∧ {𝑗 ∈ 𝑆 ∣ 𝜑} ≠ ∅) → ∃𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘)
11	5, 9, 10	syl2anc 585	. 2 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → ∃𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘)
12	1	sseli 3918	. . . . . . . 8 ⊢ (𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} → 𝑖 ∈ 𝑆)
13	12	adantr 480	. . . . . . 7 ⊢ ((𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → 𝑖 ∈ 𝑆)
14	13	3adant1 1131	. . . . . 6 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → 𝑖 ∈ 𝑆)
15		nfcv 2899	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗𝑖
16		nfcv 2899	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗𝑆
17	15	nfsbc1 3748	. . . . . . . . . . . 12 ⊢ Ⅎ𝑗[𝑖 / 𝑗]𝜑
18		sbceq1a 3740	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑖 → (𝜑 ↔ [𝑖 / 𝑗]𝜑))
19	15, 16, 17, 18	elrabf 3632	. . . . . . . . . . 11 ⊢ (𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ↔ (𝑖 ∈ 𝑆 ∧ [𝑖 / 𝑗]𝜑))
20	19	biimpi 216	. . . . . . . . . 10 ⊢ (𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} → (𝑖 ∈ 𝑆 ∧ [𝑖 / 𝑗]𝜑))
21	20	simprd 495	. . . . . . . . 9 ⊢ (𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} → [𝑖 / 𝑗]𝜑)
22	21	adantr 480	. . . . . . . 8 ⊢ ((𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → [𝑖 / 𝑗]𝜑)
23	22	3adant1 1131	. . . . . . 7 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → [𝑖 / 𝑗]𝜑)
24		nfv 1916	. . . . . . . . 9 ⊢ Ⅎ𝑘 𝑆 ⊆ (ℤ≥‘𝑀)
25		nfv 1916	. . . . . . . . 9 ⊢ Ⅎ𝑘 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}
26		nfra1 3262	. . . . . . . . 9 ⊢ Ⅎ𝑘∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘
27	24, 25, 26	nf3an 1903	. . . . . . . 8 ⊢ Ⅎ𝑘(𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘)
28		simpl13 1252	. . . . . . . . . . 11 ⊢ ((((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) ∧ 𝜓) → ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘)
29		simpl2 1194	. . . . . . . . . . 11 ⊢ ((((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) ∧ 𝜓) → 𝑘 ∈ 𝑆)
30		simpr 484	. . . . . . . . . . 11 ⊢ ((((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) ∧ 𝜓) → 𝜓)
31		simpll 767	. . . . . . . . . . . 12 ⊢ (((∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 ∧ 𝑘 ∈ 𝑆) ∧ 𝜓) → ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘)
32		id 22	. . . . . . . . . . . . . 14 ⊢ ((𝑘 ∈ 𝑆 ∧ 𝜓) → (𝑘 ∈ 𝑆 ∧ 𝜓))
33		nfcv 2899	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑗𝑘
34		uzwo4.1	. . . . . . . . . . . . . . 15 ⊢ Ⅎ𝑗𝜓
35		uzwo4.2	. . . . . . . . . . . . . . 15 ⊢ (𝑗 = 𝑘 → (𝜑 ↔ 𝜓))
36	33, 16, 34, 35	elrabf 3632	. . . . . . . . . . . . . 14 ⊢ (𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ↔ (𝑘 ∈ 𝑆 ∧ 𝜓))
37	32, 36	sylibr 234	. . . . . . . . . . . . 13 ⊢ ((𝑘 ∈ 𝑆 ∧ 𝜓) → 𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑})
38	37	adantll 715	. . . . . . . . . . . 12 ⊢ (((∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 ∧ 𝑘 ∈ 𝑆) ∧ 𝜓) → 𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑})
39		rspa 3227	. . . . . . . . . . . 12 ⊢ ((∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 ∧ 𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}) → 𝑖 ≤ 𝑘)
40	31, 38, 39	syl2anc 585	. . . . . . . . . . 11 ⊢ (((∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 ∧ 𝑘 ∈ 𝑆) ∧ 𝜓) → 𝑖 ≤ 𝑘)
41	28, 29, 30, 40	syl21anc 838	. . . . . . . . . 10 ⊢ ((((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) ∧ 𝜓) → 𝑖 ≤ 𝑘)
42	4	sselda 3922	. . . . . . . . . . . . . . . 16 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}) → 𝑖 ∈ (ℤ≥‘𝑀))
43		eluzelz 12762	. . . . . . . . . . . . . . . 16 ⊢ (𝑖 ∈ (ℤ≥‘𝑀) → 𝑖 ∈ ℤ)
44	42, 43	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}) → 𝑖 ∈ ℤ)
45	44	zred 12597	. . . . . . . . . . . . . 14 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}) → 𝑖 ∈ ℝ)
46	45	3adant3 1133	. . . . . . . . . . . . 13 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → 𝑖 ∈ ℝ)
47	46	3ad2ant1 1134	. . . . . . . . . . . 12 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) → 𝑖 ∈ ℝ)
48		ssel2 3917	. . . . . . . . . . . . . . . 16 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝑆) → 𝑘 ∈ (ℤ≥‘𝑀))
49		eluzelz 12762	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ (ℤ≥‘𝑀) → 𝑘 ∈ ℤ)
50	48, 49	syl 17	. . . . . . . . . . . . . . 15 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝑆) → 𝑘 ∈ ℤ)
51	50	zred 12597	. . . . . . . . . . . . . 14 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑘 ∈ 𝑆) → 𝑘 ∈ ℝ)
52	51	3ad2antl1 1187	. . . . . . . . . . . . 13 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆) → 𝑘 ∈ ℝ)
53	52	3adant3 1133	. . . . . . . . . . . 12 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) → 𝑘 ∈ ℝ)
54		simp3 1139	. . . . . . . . . . . 12 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) → 𝑘 < 𝑖)
55		simp3 1139	. . . . . . . . . . . . 13 ⊢ ((𝑖 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 𝑘 < 𝑖) → 𝑘 < 𝑖)
56		simp2 1138	. . . . . . . . . . . . . 14 ⊢ ((𝑖 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 𝑘 < 𝑖) → 𝑘 ∈ ℝ)
57		simp1 1137	. . . . . . . . . . . . . 14 ⊢ ((𝑖 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 𝑘 < 𝑖) → 𝑖 ∈ ℝ)
58	56, 57	ltnled 11281	. . . . . . . . . . . . 13 ⊢ ((𝑖 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 𝑘 < 𝑖) → (𝑘 < 𝑖 ↔ ¬ 𝑖 ≤ 𝑘))
59	55, 58	mpbid 232	. . . . . . . . . . . 12 ⊢ ((𝑖 ∈ ℝ ∧ 𝑘 ∈ ℝ ∧ 𝑘 < 𝑖) → ¬ 𝑖 ≤ 𝑘)
60	47, 53, 54, 59	syl3anc 1374	. . . . . . . . . . 11 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) → ¬ 𝑖 ≤ 𝑘)
61	60	adantr 480	. . . . . . . . . 10 ⊢ ((((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) ∧ 𝜓) → ¬ 𝑖 ≤ 𝑘)
62	41, 61	pm2.65da 817	. . . . . . . . 9 ⊢ (((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) ∧ 𝑘 ∈ 𝑆 ∧ 𝑘 < 𝑖) → ¬ 𝜓)
63	62	3exp 1120	. . . . . . . 8 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → (𝑘 ∈ 𝑆 → (𝑘 < 𝑖 → ¬ 𝜓)))
64	27, 63	ralrimi 3236	. . . . . . 7 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓))
65	23, 64	jca 511	. . . . . 6 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → ([𝑖 / 𝑗]𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓)))
66		nfv 1916	. . . . . . . . . 10 ⊢ Ⅎ𝑗 𝑘 < 𝑖
67	34	nfn 1859	. . . . . . . . . 10 ⊢ Ⅎ𝑗 ¬ 𝜓
68	66, 67	nfim 1898	. . . . . . . . 9 ⊢ Ⅎ𝑗(𝑘 < 𝑖 → ¬ 𝜓)
69	16, 68	nfralw 3285	. . . . . . . 8 ⊢ Ⅎ𝑗∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓)
70	17, 69	nfan 1901	. . . . . . 7 ⊢ Ⅎ𝑗([𝑖 / 𝑗]𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓))
71		breq2 5090	. . . . . . . . . 10 ⊢ (𝑗 = 𝑖 → (𝑘 < 𝑗 ↔ 𝑘 < 𝑖))
72	71	imbi1d 341	. . . . . . . . 9 ⊢ (𝑗 = 𝑖 → ((𝑘 < 𝑗 → ¬ 𝜓) ↔ (𝑘 < 𝑖 → ¬ 𝜓)))
73	72	ralbidv 3161	. . . . . . . 8 ⊢ (𝑗 = 𝑖 → (∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓) ↔ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓)))
74	18, 73	anbi12d 633	. . . . . . 7 ⊢ (𝑗 = 𝑖 → ((𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)) ↔ ([𝑖 / 𝑗]𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓))))
75	70, 74	rspce 3554	. . . . . 6 ⊢ ((𝑖 ∈ 𝑆 ∧ ([𝑖 / 𝑗]𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑖 → ¬ 𝜓))) → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)))
76	14, 65, 75	syl2anc 585	. . . . 5 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ 𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} ∧ ∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘) → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)))
77	76	3exp 1120	. . . 4 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → (𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑} → (∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)))))
78	77	rexlimdv 3137	. . 3 ⊢ (𝑆 ⊆ (ℤ≥‘𝑀) → (∃𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓))))
79	78	adantr 480	. 2 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → (∃𝑖 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}∀𝑘 ∈ {𝑗 ∈ 𝑆 ∣ 𝜑}𝑖 ≤ 𝑘 → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓))))
80	11, 79	mpd 15	1 ⊢ ((𝑆 ⊆ (ℤ≥‘𝑀) ∧ ∃𝑗 ∈ 𝑆 𝜑) → ∃𝑗 ∈ 𝑆 (𝜑 ∧ ∀𝑘 ∈ 𝑆 (𝑘 < 𝑗 → ¬ 𝜓)))

Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1087   = wceq 1542  Ⅎwnf 1785   ∈ wcel 2114   ≠ wne 2933  ∀wral 3052  ∃wrex 3062  {crab 3390  [wsbc 3729   ⊆ wss 3890  ∅c0 4274   class class class wbr 5086  ‘cfv 6490  ℝcr 11026   < clt 11167   ≤ cle 11168  ℤcz 12489  ℤ_≥cuz 12752

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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-10 2147  ax-11 2163  ax-12 2185  ax-ext 2709  ax-sep 5231  ax-nul 5241  ax-pow 5300  ax-pr 5368  ax-un 7680  ax-cnex 11083  ax-resscn 11084  ax-1cn 11085  ax-icn 11086  ax-addcl 11087  ax-addrcl 11088  ax-mulcl 11089  ax-mulrcl 11090  ax-mulcom 11091  ax-addass 11092  ax-mulass 11093  ax-distr 11094  ax-i2m1 11095  ax-1ne0 11096  ax-1rid 11097  ax-rnegex 11098  ax-rrecex 11099  ax-cnre 11100  ax-pre-lttri 11101  ax-pre-lttrn 11102  ax-pre-ltadd 11103  ax-pre-mulgt0 11104

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3or 1088  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-nf 1786  df-sb 2069  df-mo 2540  df-eu 2570  df-clab 2716  df-cleq 2729  df-clel 2812  df-nfc 2886  df-ne 2934  df-nel 3038  df-ral 3053  df-rex 3063  df-reu 3344  df-rab 3391  df-v 3432  df-sbc 3730  df-csb 3839  df-dif 3893  df-un 3895  df-in 3897  df-ss 3907  df-pss 3910  df-nul 4275  df-if 4468  df-pw 4544  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-iun 4936  df-br 5087  df-opab 5149  df-mpt 5168  df-tr 5194  df-id 5517  df-eprel 5522  df-po 5530  df-so 5531  df-fr 5575  df-we 5577  df-xp 5628  df-rel 5629  df-cnv 5630  df-co 5631  df-dm 5632  df-rn 5633  df-res 5634  df-ima 5635  df-pred 6257  df-ord 6318  df-on 6319  df-lim 6320  df-suc 6321  df-iota 6446  df-fun 6492  df-fn 6493  df-f 6494  df-f1 6495  df-fo 6496  df-f1o 6497  df-fv 6498  df-riota 7315  df-ov 7361  df-oprab 7362  df-mpo 7363  df-om 7809  df-2nd 7934  df-frecs 8222  df-wrecs 8253  df-recs 8302  df-rdg 8340  df-er 8634  df-en 8885  df-dom 8886  df-sdom 8887  df-pnf 11169  df-mnf 11170  df-xr 11171  df-ltxr 11172  df-le 11173  df-sub 11367  df-neg 11368  df-nn 12147  df-n0 12403  df-z 12490  df-uz 12753

This theorem is referenced by:  iundjiun  46892