Theorem itg2leub 24434

Description: Any upper bound on the integrals of all simple functions 𝐺 dominated by 𝐹 is greater than (∫₂‘𝐹), the least upper bound. (Contributed by Mario Carneiro, 28-Jun-2014.)

Assertion

Ref	Expression
itg2leub	⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → ((∫2‘𝐹) ≤ 𝐴 ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))

Distinct variable groups:   𝐴,𝑔   𝑔,𝐹

Proof of Theorem itg2leub

Dummy variables 𝑥 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2758	. . . . 5 ⊢ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))} = {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}
2	1	itg2val 24428	. . . 4 ⊢ (𝐹:ℝ⟶(0[,]+∞) → (∫2‘𝐹) = sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ))
3	2	adantr 484	. . 3 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → (∫2‘𝐹) = sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ))
4	3	breq1d 5042	. 2 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → ((∫2‘𝐹) ≤ 𝐴 ↔ sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ) ≤ 𝐴))
5	1	itg2lcl 24427	. . . . 5 ⊢ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))} ⊆ ℝ*
6		supxrleub 12760	. . . . 5 ⊢ (({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))} ⊆ ℝ* ∧ 𝐴 ∈ ℝ*) → (sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ) ≤ 𝐴 ↔ ∀𝑧 ∈ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}𝑧 ≤ 𝐴))
7	5, 6	mpan 689	. . . 4 ⊢ (𝐴 ∈ ℝ* → (sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ) ≤ 𝐴 ↔ ∀𝑧 ∈ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}𝑧 ≤ 𝐴))
8	7	adantl 485	. . 3 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → (sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ) ≤ 𝐴 ↔ ∀𝑧 ∈ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}𝑧 ≤ 𝐴))
9		eqeq1 2762	. . . . . . 7 ⊢ (𝑥 = 𝑧 → (𝑥 = (∫1‘𝑔) ↔ 𝑧 = (∫1‘𝑔)))
10	9	anbi2d 631	. . . . . 6 ⊢ (𝑥 = 𝑧 → ((𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔)) ↔ (𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔))))
11	10	rexbidv 3221	. . . . 5 ⊢ (𝑥 = 𝑧 → (∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔)) ↔ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔))))
12	11	ralab 3607	. . . 4 ⊢ (∀𝑧 ∈ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}𝑧 ≤ 𝐴 ↔ ∀𝑧(∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴))
13		r19.23v 3203	. . . . . . 7 ⊢ (∀𝑔 ∈ dom ∫1((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ (∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴))
14		ancomst 468	. . . . . . . . 9 ⊢ (((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ((𝑧 = (∫1‘𝑔) ∧ 𝑔 ∘r ≤ 𝐹) → 𝑧 ≤ 𝐴))
15		impexp 454	. . . . . . . . 9 ⊢ (((𝑧 = (∫1‘𝑔) ∧ 𝑔 ∘r ≤ 𝐹) → 𝑧 ≤ 𝐴) ↔ (𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
16	14, 15	bitri 278	. . . . . . . 8 ⊢ (((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ (𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
17	16	ralbii 3097	. . . . . . 7 ⊢ (∀𝑔 ∈ dom ∫1((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ∀𝑔 ∈ dom ∫1(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
18	13, 17	bitr3i 280	. . . . . 6 ⊢ ((∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ∀𝑔 ∈ dom ∫1(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
19	18	albii 1821	. . . . 5 ⊢ (∀𝑧(∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ∀𝑧∀𝑔 ∈ dom ∫1(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
20		ralcom4 3162	. . . . . 6 ⊢ (∀𝑔 ∈ dom ∫1∀𝑧(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)) ↔ ∀𝑧∀𝑔 ∈ dom ∫1(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
21		fvex 6671	. . . . . . . 8 ⊢ (∫1‘𝑔) ∈ V
22		breq1 5035	. . . . . . . . 9 ⊢ (𝑧 = (∫1‘𝑔) → (𝑧 ≤ 𝐴 ↔ (∫1‘𝑔) ≤ 𝐴))
23	22	imbi2d 344	. . . . . . . 8 ⊢ (𝑧 = (∫1‘𝑔) → ((𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴) ↔ (𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))
24	21, 23	ceqsalv 3448	. . . . . . 7 ⊢ (∀𝑧(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)) ↔ (𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
25	24	ralbii 3097	. . . . . 6 ⊢ (∀𝑔 ∈ dom ∫1∀𝑧(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)) ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
26	20, 25	bitr3i 280	. . . . 5 ⊢ (∀𝑧∀𝑔 ∈ dom ∫1(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)) ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
27	19, 26	bitri 278	. . . 4 ⊢ (∀𝑧(∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
28	12, 27	bitri 278	. . 3 ⊢ (∀𝑧 ∈ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}𝑧 ≤ 𝐴 ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
29	8, 28	bitrdi 290	. 2 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → (sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ) ≤ 𝐴 ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))
30	4, 29	bitrd 282	1 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → ((∫2‘𝐹) ≤ 𝐴 ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))

Syntax hints:   → wi 4   ↔ wb 209   ∧ wa 399  ∀wal 1536   = wceq 1538   ∈ wcel 2111  {cab 2735  ∀wral 3070  ∃wrex 3071   ⊆ wss 3858   class class class wbr 5032  dom cdm 5524  ⟶wf 6331  ‘cfv 6335  (class class class)co 7150   ∘_r cofr 7404  supcsup 8937  ℝcr 10574  0cc0 10575  +∞cpnf 10710  ℝ^*cxr 10712   < clt 10713   ≤ cle 10714  [,]cicc 12782  ∫₁citg1 24315  ∫₂citg2 24316

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 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-rep 5156  ax-sep 5169  ax-nul 5176  ax-pow 5234  ax-pr 5298  ax-un 7459  ax-inf2 9137  ax-cnex 10631  ax-resscn 10632  ax-1cn 10633  ax-icn 10634  ax-addcl 10635  ax-addrcl 10636  ax-mulcl 10637  ax-mulrcl 10638  ax-mulcom 10639  ax-addass 10640  ax-mulass 10641  ax-distr 10642  ax-i2m1 10643  ax-1ne0 10644  ax-1rid 10645  ax-rnegex 10646  ax-rrecex 10647  ax-cnre 10648  ax-pre-lttri 10649  ax-pre-lttrn 10650  ax-pre-ltadd 10651  ax-pre-mulgt0 10652  ax-pre-sup 10653

This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3or 1085  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ne 2952  df-nel 3056  df-ral 3075  df-rex 3076  df-reu 3077  df-rmo 3078  df-rab 3079  df-v 3411  df-sbc 3697  df-csb 3806  df-dif 3861  df-un 3863  df-in 3865  df-ss 3875  df-pss 3877  df-nul 4226  df-if 4421  df-pw 4496  df-sn 4523  df-pr 4525  df-tp 4527  df-op 4529  df-uni 4799  df-int 4839  df-iun 4885  df-br 5033  df-opab 5095  df-mpt 5113  df-tr 5139  df-id 5430  df-eprel 5435  df-po 5443  df-so 5444  df-fr 5483  df-se 5484  df-we 5485  df-xp 5530  df-rel 5531  df-cnv 5532  df-co 5533  df-dm 5534  df-rn 5535  df-res 5536  df-ima 5537  df-pred 6126  df-ord 6172  df-on 6173  df-lim 6174  df-suc 6175  df-iota 6294  df-fun 6337  df-fn 6338  df-f 6339  df-f1 6340  df-fo 6341  df-f1o 6342  df-fv 6343  df-isom 6344  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-of 7405  df-om 7580  df-1st 7693  df-2nd 7694  df-wrecs 7957  df-recs 8018  df-rdg 8056  df-1o 8112  df-2o 8113  df-er 8299  df-map 8418  df-pm 8419  df-en 8528  df-dom 8529  df-sdom 8530  df-fin 8531  df-sup 8939  df-inf 8940  df-oi 9007  df-dju 9363  df-card 9401  df-pnf 10715  df-mnf 10716  df-xr 10717  df-ltxr 10718  df-le 10719  df-sub 10910  df-neg 10911  df-div 11336  df-nn 11675  df-2 11737  df-3 11738  df-n0 11935  df-z 12021  df-uz 12283  df-q 12389  df-rp 12431  df-xadd 12549  df-ioo 12783  df-ico 12785  df-icc 12786  df-fz 12940  df-fzo 13083  df-fl 13211  df-seq 13419  df-exp 13480  df-hash 13741  df-cj 14506  df-re 14507  df-im 14508  df-sqrt 14642  df-abs 14643  df-clim 14893  df-sum 15091  df-xmet 20159  df-met 20160  df-ovol 24164  df-vol 24165  df-mbf 24319  df-itg1 24320  df-itg2 24321

This theorem is referenced by:  itg2itg1  24436  itg2le  24439  itg2seq  24442  itg2lea  24444  itg2mulclem  24446  itg2splitlem  24448  itg2split  24449  itg2mono  24453  ftc1anclem5  35414