sge0lempt - Mathbox for Glauco Siliprandi

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Theorem sge0lempt 46381

Description: If all of the terms of sums compare, so do the sums. (Contributed by Glauco Siliprandi, 17-Aug-2020.)

**Hypotheses**
Ref	Expression
sge0lempt.xph	⊢ Ⅎ𝑥𝜑
sge0lempt.a	⊢ (𝜑 → 𝐴 ∈ 𝑉)
sge0lempt.b	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞))
sge0lempt.c	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ (0[,]+∞))
sge0lempt.le	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ≤ 𝐶)

**Assertion**
Ref	Expression
sge0lempt	⊢ (𝜑 → (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐶)))

Distinct variable group: 𝑥,𝐴 Allowed substitution hints: 𝜑(𝑥) 𝐵(𝑥) 𝐶(𝑥) 𝑉(𝑥)

Proof of Theorem sge0lempt Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		sge0lempt.a	. 2 ⊢ (𝜑 → 𝐴 ∈ 𝑉)
2		sge0lempt.xph	. . 3 ⊢ Ⅎ𝑥𝜑
3		sge0lempt.b	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞))
4		eqid 2729	. . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)
5	2, 3, 4	fmptdf 7071	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,]+∞))
6		sge0lempt.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ (0[,]+∞))
7		eqid 2729	. . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐴 ↦ 𝐶)
8	2, 6, 7	fmptdf 7071	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶):𝐴⟶(0[,]+∞))
9		nfv 1914	. . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴
10	2, 9	nfan 1899	. . . . 5 ⊢ Ⅎ𝑥(𝜑 ∧ 𝑦 ∈ 𝐴)
11		nfcv 2891	. . . . . . 7 ⊢ Ⅎ𝑥𝑦
12	11	nfcsb1 3882	. . . . . 6 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵
13		nfcv 2891	. . . . . 6 ⊢ Ⅎ𝑥 ≤
14	11	nfcsb1 3882	. . . . . 6 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐶
15	12, 13, 14	nfbr 5149	. . . . 5 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶
16	10, 15	nfim 1896	. . . 4 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶)
17		eleq1w 2811	. . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴))
18	17	anbi2d 630	. . . . 5 ⊢ (𝑥 = 𝑦 → ((𝜑 ∧ 𝑥 ∈ 𝐴) ↔ (𝜑 ∧ 𝑦 ∈ 𝐴)))
19		csbeq1a 3873	. . . . . 6 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵)
20		csbeq1a 3873	. . . . . 6 ⊢ (𝑥 = 𝑦 → 𝐶 = ⦋𝑦 / 𝑥⦌𝐶)
21	19, 20	breq12d 5115	. . . . 5 ⊢ (𝑥 = 𝑦 → (𝐵 ≤ 𝐶 ↔ ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶))
22	18, 21	imbi12d 344	. . . 4 ⊢ (𝑥 = 𝑦 → (((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ≤ 𝐶) ↔ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶)))
23		sge0lempt.le	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ≤ 𝐶)
24	16, 22, 23	chvarfv 2241	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶)
25		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴)
26	12	nfel1 2908	. . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞)
27	10, 26	nfim 1896	. . . . . 6 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞))
28	19	eleq1d 2813	. . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝐵 ∈ (0[,]+∞) ↔ ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞)))
29	18, 28	imbi12d 344	. . . . . 6 ⊢ (𝑥 = 𝑦 → (((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐵 ∈ (0[,]+∞)) ↔ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞))))
30	27, 29, 3	chvarfv 2241	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞))
31	11, 12, 19, 4	fvmptf 6971	. . . . 5 ⊢ ((𝑦 ∈ 𝐴 ∧ ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞)) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐵)
32	25, 30, 31	syl2anc 584	. . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐵)
33		nfcv 2891	. . . . . . . 8 ⊢ Ⅎ𝑥(0[,]+∞)
34	14, 33	nfel 2906	. . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞)
35	10, 34	nfim 1896	. . . . . 6 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞))
36	20	eleq1d 2813	. . . . . . 7 ⊢ (𝑥 = 𝑦 → (𝐶 ∈ (0[,]+∞) ↔ ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞)))
37	18, 36	imbi12d 344	. . . . . 6 ⊢ (𝑥 = 𝑦 → (((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ (0[,]+∞)) ↔ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞))))
38	35, 37, 6	chvarfv 2241	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞))
39	11, 14, 20, 7	fvmptf 6971	. . . . 5 ⊢ ((𝑦 ∈ 𝐴 ∧ ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞)) → ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐶)
40	25, 38, 39	syl2anc 584	. . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐶)
41	32, 40	breq12d 5115	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → (((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) ≤ ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦) ↔ ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶))
42	24, 41	mpbird 257	. 2 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) ≤ ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦))
43	1, 5, 8, 42	sge0le 46378	1 ⊢ (𝜑 → (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 Ⅎwnf 1783 ∈ wcel 2109 ⦋csb 3859 class class class wbr 5102 ↦ cmpt 5183 ‘cfv 6499 (class class class)co 7369 0cc0 11044 +∞cpnf 11181 ≤ cle 11185 [,]cicc 13285 Σ^{^}csumge0 46333

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5229 ax-sep 5246 ax-nul 5256 ax-pow 5315 ax-pr 5382 ax-un 7691 ax-inf2 9570 ax-cnex 11100 ax-resscn 11101 ax-1cn 11102 ax-icn 11103 ax-addcl 11104 ax-addrcl 11105 ax-mulcl 11106 ax-mulrcl 11107 ax-mulcom 11108 ax-addass 11109 ax-mulass 11110 ax-distr 11111 ax-i2m1 11112 ax-1ne0 11113 ax-1rid 11114 ax-rnegex 11115 ax-rrecex 11116 ax-cnre 11117 ax-pre-lttri 11118 ax-pre-lttrn 11119 ax-pre-ltadd 11120 ax-pre-mulgt0 11121 ax-pre-sup 11122

This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3351 df-reu 3352 df-rab 3403 df-v 3446 df-sbc 3751 df-csb 3860 df-dif 3914 df-un 3916 df-in 3918 df-ss 3928 df-pss 3931 df-nul 4293 df-if 4485 df-pw 4561 df-sn 4586 df-pr 4588 df-op 4592 df-uni 4868 df-int 4907 df-iun 4953 df-br 5103 df-opab 5165 df-mpt 5184 df-tr 5210 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-se 5585 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6262 df-ord 6323 df-on 6324 df-lim 6325 df-suc 6326 df-iota 6452 df-fun 6501 df-fn 6502 df-f 6503 df-f1 6504 df-fo 6505 df-f1o 6506 df-fv 6507 df-isom 6508 df-riota 7326 df-ov 7372 df-oprab 7373 df-mpo 7374 df-om 7823 df-1st 7947 df-2nd 7948 df-frecs 8237 df-wrecs 8268 df-recs 8317 df-rdg 8355 df-1o 8411 df-er 8648 df-en 8896 df-dom 8897 df-sdom 8898 df-fin 8899 df-sup 9369 df-oi 9439 df-card 9868 df-pnf 11186 df-mnf 11187 df-xr 11188 df-ltxr 11189 df-le 11190 df-sub 11383 df-neg 11384 df-div 11812 df-nn 12163 df-2 12225 df-3 12226 df-n0 12419 df-z 12506 df-uz 12770 df-rp 12928 df-ico 13288 df-icc 13289 df-fz 13445 df-fzo 13592 df-seq 13943 df-exp 14003 df-hash 14272 df-cj 15041 df-re 15042 df-im 15043 df-sqrt 15177 df-abs 15178 df-clim 15430 df-sum 15629 df-sumge0 46334

This theorem is referenced by: sge0iunmptlemre 46386 sge0xadd 46406 meaiunlelem 46439 hoicvrrex 46527 ovnsubaddlem1 46541 sge0hsphoire 46560 hoidmv1lelem1 46562 hoidmv1lelem2 46563 hoidmv1lelem3 46564 hoidmvlelem1 46566 hoidmvlelem2 46567 hoidmvlelem4 46569 hspmbllem2 46598 ovolval5lem1 46623

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