Theorem itg2leub 24329

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 2821	. . . . 5 ⊢ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))} = {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}
2	1	itg2val 24323	. . . 4 ⊢ (𝐹:ℝ⟶(0[,]+∞) → (∫2‘𝐹) = sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ))
3	2	adantr 483	. . 3 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → (∫2‘𝐹) = sup({𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))}, ℝ*, < ))
4	3	breq1d 5068	. 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 24322	. . . . 5 ⊢ {𝑥 ∣ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔))} ⊆ ℝ*
6		supxrleub 12713	. . . . 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 688	. . . 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 484	. . 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 2825	. . . . . . 7 ⊢ (𝑥 = 𝑧 → (𝑥 = (∫1‘𝑔) ↔ 𝑧 = (∫1‘𝑔)))
10	9	anbi2d 630	. . . . . 6 ⊢ (𝑥 = 𝑧 → ((𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔)) ↔ (𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔))))
11	10	rexbidv 3297	. . . . 5 ⊢ (𝑥 = 𝑧 → (∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑥 = (∫1‘𝑔)) ↔ ∃𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔))))
12	11	ralab 3683	. . . 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 3279	. . . . . . 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 467	. . . . . . . . 9 ⊢ (((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ ((𝑧 = (∫1‘𝑔) ∧ 𝑔 ∘r ≤ 𝐹) → 𝑧 ≤ 𝐴))
15		impexp 453	. . . . . . . . 9 ⊢ (((𝑧 = (∫1‘𝑔) ∧ 𝑔 ∘r ≤ 𝐹) → 𝑧 ≤ 𝐴) ↔ (𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
16	14, 15	bitri 277	. . . . . . . 8 ⊢ (((𝑔 ∘r ≤ 𝐹 ∧ 𝑧 = (∫1‘𝑔)) → 𝑧 ≤ 𝐴) ↔ (𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)))
17	16	ralbii 3165	. . . . . . 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 279	. . . . . 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 1816	. . . . 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 3235	. . . . . 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 6677	. . . . . . . 8 ⊢ (∫1‘𝑔) ∈ V
22		breq1 5061	. . . . . . . . 9 ⊢ (𝑧 = (∫1‘𝑔) → (𝑧 ≤ 𝐴 ↔ (∫1‘𝑔) ≤ 𝐴))
23	22	imbi2d 343	. . . . . . . 8 ⊢ (𝑧 = (∫1‘𝑔) → ((𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴) ↔ (𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))
24	21, 23	ceqsalv 3532	. . . . . . 7 ⊢ (∀𝑧(𝑧 = (∫1‘𝑔) → (𝑔 ∘r ≤ 𝐹 → 𝑧 ≤ 𝐴)) ↔ (𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴))
25	24	ralbii 3165	. . . . . 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 279	. . . . 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 277	. . . 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 277	. . 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	syl6bb 289	. 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 281	1 ⊢ ((𝐹:ℝ⟶(0[,]+∞) ∧ 𝐴 ∈ ℝ*) → ((∫2‘𝐹) ≤ 𝐴 ↔ ∀𝑔 ∈ dom ∫1(𝑔 ∘r ≤ 𝐹 → (∫1‘𝑔) ≤ 𝐴)))

Syntax hints:   → wi 4   ↔ wb 208   ∧ wa 398  ∀wal 1531   = wceq 1533   ∈ wcel 2110  {cab 2799  ∀wral 3138  ∃wrex 3139   ⊆ wss 3935   class class class wbr 5058  dom cdm 5549  ⟶wf 6345  ‘cfv 6349  (class class class)co 7150   ∘_r cofr 7402  supcsup 8898  ℝcr 10530  0cc0 10531  +∞cpnf 10666  ℝ^*cxr 10668   < clt 10669   ≤ cle 10670  [,]cicc 12735  ∫₁citg1 24210  ∫₂citg2 24211

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-rep 5182  ax-sep 5195  ax-nul 5202  ax-pow 5258  ax-pr 5321  ax-un 7455  ax-inf2 9098  ax-cnex 10587  ax-resscn 10588  ax-1cn 10589  ax-icn 10590  ax-addcl 10591  ax-addrcl 10592  ax-mulcl 10593  ax-mulrcl 10594  ax-mulcom 10595  ax-addass 10596  ax-mulass 10597  ax-distr 10598  ax-i2m1 10599  ax-1ne0 10600  ax-1rid 10601  ax-rnegex 10602  ax-rrecex 10603  ax-cnre 10604  ax-pre-lttri 10605  ax-pre-lttrn 10606  ax-pre-ltadd 10607  ax-pre-mulgt0 10608  ax-pre-sup 10609

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1536  df-fal 1546  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ne 3017  df-nel 3124  df-ral 3143  df-rex 3144  df-reu 3145  df-rmo 3146  df-rab 3147  df-v 3496  df-sbc 3772  df-csb 3883  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-pss 3953  df-nul 4291  df-if 4467  df-pw 4540  df-sn 4561  df-pr 4563  df-tp 4565  df-op 4567  df-uni 4832  df-int 4869  df-iun 4913  df-br 5059  df-opab 5121  df-mpt 5139  df-tr 5165  df-id 5454  df-eprel 5459  df-po 5468  df-so 5469  df-fr 5508  df-se 5509  df-we 5510  df-xp 5555  df-rel 5556  df-cnv 5557  df-co 5558  df-dm 5559  df-rn 5560  df-res 5561  df-ima 5562  df-pred 6142  df-ord 6188  df-on 6189  df-lim 6190  df-suc 6191  df-iota 6308  df-fun 6351  df-fn 6352  df-f 6353  df-f1 6354  df-fo 6355  df-f1o 6356  df-fv 6357  df-isom 6358  df-riota 7108  df-ov 7153  df-oprab 7154  df-mpo 7155  df-of 7403  df-om 7575  df-1st 7683  df-2nd 7684  df-wrecs 7941  df-recs 8002  df-rdg 8040  df-1o 8096  df-2o 8097  df-oadd 8100  df-er 8283  df-map 8402  df-pm 8403  df-en 8504  df-dom 8505  df-sdom 8506  df-fin 8507  df-sup 8900  df-inf 8901  df-oi 8968  df-dju 9324  df-card 9362  df-pnf 10671  df-mnf 10672  df-xr 10673  df-ltxr 10674  df-le 10675  df-sub 10866  df-neg 10867  df-div 11292  df-nn 11633  df-2 11694  df-3 11695  df-n0 11892  df-z 11976  df-uz 12238  df-q 12343  df-rp 12384  df-xadd 12502  df-ioo 12736  df-ico 12738  df-icc 12739  df-fz 12887  df-fzo 13028  df-fl 13156  df-seq 13364  df-exp 13424  df-hash 13685  df-cj 14452  df-re 14453  df-im 14454  df-sqrt 14588  df-abs 14589  df-clim 14839  df-sum 15037  df-xmet 20532  df-met 20533  df-ovol 24059  df-vol 24060  df-mbf 24214  df-itg1 24215  df-itg2 24216

This theorem is referenced by:  itg2itg1  24331  itg2le  24334  itg2seq  24337  itg2lea  24339  itg2mulclem  24341  itg2splitlem  24343  itg2split  24344  itg2mono  24348  ftc1anclem5  34965