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Theorem limsuplt 15532

Description: The defining property of the superior limit. (Contributed by Mario Carneiro, 7-Sep-2014.) (Revised by AV, 12-Sep-2020.)

**Hypothesis**
Ref	Expression
limsupval.1	⊢ 𝐺 = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ^), ℝ^, < ))

**Assertion**
Ref	Expression
limsuplt	⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((lim sup‘𝐹) < 𝐴 ↔ ∃𝑗 ∈ ℝ (𝐺‘𝑗) < 𝐴))

Distinct variable groups: 𝑘,𝐹 𝐴,𝑗 𝐵,𝑗 𝑗,𝑘,𝐹 𝑗,𝐺 Allowed substitution hints: 𝐴(𝑘) 𝐵(𝑘) 𝐺(𝑘)

**Proof of Theorem limsuplt**
Step	Hyp	Ref	Expression
1		limsupval.1	. . . . 5 ⊢ 𝐺 = (𝑘 ∈ ℝ ↦ sup(((𝐹 “ (𝑘[,)+∞)) ∩ ℝ^), ℝ^, < ))
2	1	limsuple 15531	. . . 4 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → (𝐴 ≤ (lim sup‘𝐹) ↔ ∀𝑗 ∈ ℝ 𝐴 ≤ (𝐺‘𝑗)))
3	2	notbid 321	. . 3 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → (¬ 𝐴 ≤ (lim sup‘𝐹) ↔ ¬ ∀𝑗 ∈ ℝ 𝐴 ≤ (𝐺‘𝑗)))
4		rexnal 3117	. . 3 ⊢ (∃𝑗 ∈ ℝ ¬ 𝐴 ≤ (𝐺‘𝑗) ↔ ¬ ∀𝑗 ∈ ℝ 𝐴 ≤ (𝐺‘𝑗))
5	3, 4	bitr4di 292	. 2 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → (¬ 𝐴 ≤ (lim sup‘𝐹) ↔ ∃𝑗 ∈ ℝ ¬ 𝐴 ≤ (𝐺‘𝑗)))
6		simp2 1155	. . . . 5 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^) → 𝐹:𝐵⟶ℝ^)
7		reex 11192	. . . . . . 7 ⊢ ℝ ∈ V
8	7	ssex 5292	. . . . . 6 ⊢ (𝐵 ⊆ ℝ → 𝐵 ∈ V)
9	8	3ad2ant1 1151	. . . . 5 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → 𝐵 ∈ V)
10		xrex 13012	. . . . . 6 ⊢ ℝ^* ∈ V
11	10	a1i 11	. . . . 5 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^) → ℝ^ ∈ V)
12		fex2 7934	. . . . 5 ⊢ ((𝐹:𝐵⟶ℝ^* ∧ 𝐵 ∈ V ∧ ℝ^* ∈ V) → 𝐹 ∈ V)
13	6, 9, 11, 12	syl3anc 1398	. . . 4 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → 𝐹 ∈ V)
14		limsupcl 15526	. . . 4 ⊢ (𝐹 ∈ V → (lim sup‘𝐹) ∈ ℝ^*)
15	13, 14	syl 18	. . 3 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^) → (lim sup‘𝐹) ∈ ℝ^)
16		simp3 1156	. . 3 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^) → 𝐴 ∈ ℝ^)
17		xrltnle 11277	. . 3 ⊢ (((lim sup‘𝐹) ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((lim sup‘𝐹) < 𝐴 ↔ ¬ 𝐴 ≤ (lim sup‘𝐹)))
18	15, 16, 17	syl2anc 595	. 2 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((lim sup‘𝐹) < 𝐴 ↔ ¬ 𝐴 ≤ (lim sup‘𝐹)))
19	1	limsupgf 15528	. . . . 5 ⊢ 𝐺:ℝ⟶ℝ^*
20	19	ffvelcdmi 7080	. . . 4 ⊢ (𝑗 ∈ ℝ → (𝐺‘𝑗) ∈ ℝ^*)
21		xrltnle 11277	. . . 4 ⊢ (((𝐺‘𝑗) ∈ ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((𝐺‘𝑗) < 𝐴 ↔ ¬ 𝐴 ≤ (𝐺‘𝑗)))
22	20, 16, 21	syl2anr 608	. . 3 ⊢ (((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) ∧ 𝑗 ∈ ℝ) → ((𝐺‘𝑗) < 𝐴 ↔ ¬ 𝐴 ≤ (𝐺‘𝑗)))
23	22	rexbidva 3187	. 2 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → (∃𝑗 ∈ ℝ (𝐺‘𝑗) < 𝐴 ↔ ∃𝑗 ∈ ℝ ¬ 𝐴 ≤ (𝐺‘𝑗)))
24	5, 18, 23	3bitr4d 314	1 ⊢ ((𝐵 ⊆ ℝ ∧ 𝐹:𝐵⟶ℝ^* ∧ 𝐴 ∈ ℝ^*) → ((lim sup‘𝐹) < 𝐴 ↔ ∃𝑗 ∈ ℝ (𝐺‘𝑗) < 𝐴))

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ w3a 1103 = wceq 1570 ∈ wcel 2143 ∀wral 3079 ∃wrex 3089 Vcvv 3455 ∩ cin 3905 ⊆ wss 3906 class class class wbr 5110 ↦ cmpt 5193 “ cima 5666 ⟶wf 6534 ‘cfv 6538 (class class class)co 7412 supcsup 9401 ℝcr 11100 +∞cpnf 11241 ℝ^*cxr 11243 < clt 11244 ≤ cle 11245 [,)cico 13375 lim supclsp 15523

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-cnex 11157 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 ax-pre-sup 11179

This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-sup 9403 df-inf 9404 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-limsup 15524

This theorem is referenced by: limsupgre 15534 limsuplt2 46450

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