ressioosup - Mathbox for Glauco Siliprandi

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Theorem ressioosup 45020

Description: If the supremum does not belong to a set of reals, the set is a subset of the unbounded below, right-open interval, with upper bound equal to the supremum. (Contributed by Glauco Siliprandi, 26-Jun-2021.)

**Hypotheses**
Ref	Expression
ressioosup.a	⊢ (𝜑 → 𝐴 ⊆ ℝ)
ressioosup.s	⊢ 𝑆 = sup(𝐴, ℝ^*, < )
ressioosup.n	⊢ (𝜑 → ¬ 𝑆 ∈ 𝐴)
ressioosup.i	⊢ 𝐼 = (-∞(,)𝑆)

**Assertion**
Ref	Expression
ressioosup	⊢ (𝜑 → 𝐴 ⊆ 𝐼)

Proof of Theorem ressioosup Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		mnfxr 11301	. . . . . 6 ⊢ -∞ ∈ ℝ^*
2	1	a1i 11	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -∞ ∈ ℝ^*)
3		ressioosup.s	. . . . . 6 ⊢ 𝑆 = sup(𝐴, ℝ^*, < )
4		ressioosup.a	. . . . . . . . 9 ⊢ (𝜑 → 𝐴 ⊆ ℝ)
5		ressxr 11288	. . . . . . . . . 10 ⊢ ℝ ⊆ ℝ^*
6	5	a1i 11	. . . . . . . . 9 ⊢ (𝜑 → ℝ ⊆ ℝ^*)
7	4, 6	sstrd 3988	. . . . . . . 8 ⊢ (𝜑 → 𝐴 ⊆ ℝ^*)
8	7	adantr 479	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 ⊆ ℝ^*)
9	8	supxrcld 44555	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → sup(𝐴, ℝ^, < ) ∈ ℝ^)
10	3, 9	eqeltrid 2829	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑆 ∈ ℝ^*)
11	4	adantr 479	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐴 ⊆ ℝ)
12		simpr 483	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐴)
13	11, 12	sseldd 3978	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℝ)
14	13	mnfltd 13136	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → -∞ < 𝑥)
15	7	sselda 3977	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ ℝ^*)
16		supxrub 13335	. . . . . . . 8 ⊢ ((𝐴 ⊆ ℝ^* ∧ 𝑥 ∈ 𝐴) → 𝑥 ≤ sup(𝐴, ℝ^*, < ))
17	8, 12, 16	syl2anc 582	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ≤ sup(𝐴, ℝ^*, < ))
18	3	a1i 11	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑆 = sup(𝐴, ℝ^*, < ))
19	18	eqcomd 2731	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → sup(𝐴, ℝ^*, < ) = 𝑆)
20	17, 19	breqtrd 5174	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ≤ 𝑆)
21		id 22	. . . . . . . . . . . 12 ⊢ (𝑥 = 𝑆 → 𝑥 = 𝑆)
22	21	eqcomd 2731	. . . . . . . . . . 11 ⊢ (𝑥 = 𝑆 → 𝑆 = 𝑥)
23	22	adantl 480	. . . . . . . . . 10 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑥 = 𝑆) → 𝑆 = 𝑥)
24		simpl 481	. . . . . . . . . 10 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑥 = 𝑆) → 𝑥 ∈ 𝐴)
25	23, 24	eqeltrd 2825	. . . . . . . . 9 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑥 = 𝑆) → 𝑆 ∈ 𝐴)
26	25	adantll 712	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑥 = 𝑆) → 𝑆 ∈ 𝐴)
27		ressioosup.n	. . . . . . . . 9 ⊢ (𝜑 → ¬ 𝑆 ∈ 𝐴)
28	27	ad2antrr 724	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝐴) ∧ 𝑥 = 𝑆) → ¬ 𝑆 ∈ 𝐴)
29	26, 28	pm2.65da 815	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → ¬ 𝑥 = 𝑆)
30	29	neqned 2937	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ≠ 𝑆)
31	15, 10, 20, 30	xrleneltd 44785	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 < 𝑆)
32	2, 10, 13, 14, 31	eliood 44963	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ (-∞(,)𝑆))
33		ressioosup.i	. . . 4 ⊢ 𝐼 = (-∞(,)𝑆)
34	32, 33	eleqtrrdi 2836	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝑥 ∈ 𝐼)
35	34	ralrimiva 3136	. 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 𝑥 ∈ 𝐼)
36		dfss3 3966	. 2 ⊢ (𝐴 ⊆ 𝐼 ↔ ∀𝑥 ∈ 𝐴 𝑥 ∈ 𝐼)
37	35, 36	sylibr 233	1 ⊢ (𝜑 → 𝐴 ⊆ 𝐼)

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ∧ wa 394 = wceq 1533 ∈ wcel 2098 ∀wral 3051 ⊆ wss 3945 class class class wbr 5148 (class class class)co 7417 supcsup 9463 ℝcr 11137 -∞cmnf 11276 ℝ^*cxr 11277 < clt 11278 ≤ cle 11279 (,)cioo 13356

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2696 ax-sep 5299 ax-nul 5306 ax-pow 5364 ax-pr 5428 ax-un 7739 ax-cnex 11194 ax-resscn 11195 ax-1cn 11196 ax-icn 11197 ax-addcl 11198 ax-addrcl 11199 ax-mulcl 11200 ax-mulrcl 11201 ax-mulcom 11202 ax-addass 11203 ax-mulass 11204 ax-distr 11205 ax-i2m1 11206 ax-1ne0 11207 ax-1rid 11208 ax-rnegex 11209 ax-rrecex 11210 ax-cnre 11211 ax-pre-lttri 11212 ax-pre-lttrn 11213 ax-pre-ltadd 11214 ax-pre-mulgt0 11215 ax-pre-sup 11216

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2703 df-cleq 2717 df-clel 2802 df-nfc 2877 df-ne 2931 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3364 df-reu 3365 df-rab 3420 df-v 3465 df-sbc 3775 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-op 4636 df-uni 4909 df-iun 4998 df-br 5149 df-opab 5211 df-mpt 5232 df-id 5575 df-po 5589 df-so 5590 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-iota 6499 df-fun 6549 df-fn 6550 df-f 6551 df-f1 6552 df-fo 6553 df-f1o 6554 df-fv 6555 df-riota 7373 df-ov 7420 df-oprab 7421 df-mpo 7422 df-1st 7992 df-2nd 7993 df-er 8723 df-en 8963 df-dom 8964 df-sdom 8965 df-sup 9465 df-pnf 11280 df-mnf 11281 df-xr 11282 df-ltxr 11283 df-le 11284 df-sub 11476 df-neg 11477 df-ioo 13360

This theorem is referenced by: pimdecfgtioo 46185 pimincfltioo 46186

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