sge0lempt - Mathbox for Glauco Siliprandi

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Theorem sge0lempt 46838

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 2736	. . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐵) = (𝑥 ∈ 𝐴 ↦ 𝐵)
5	2, 3, 4	fmptdf 7069	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐵):𝐴⟶(0[,]+∞))
6		sge0lempt.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → 𝐶 ∈ (0[,]+∞))
7		eqid 2736	. . 3 ⊢ (𝑥 ∈ 𝐴 ↦ 𝐶) = (𝑥 ∈ 𝐴 ↦ 𝐶)
8	2, 6, 7	fmptdf 7069	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝐴 ↦ 𝐶):𝐴⟶(0[,]+∞))
9		nfv 1916	. . . . . 6 ⊢ Ⅎ𝑥 𝑦 ∈ 𝐴
10	2, 9	nfan 1901	. . . . 5 ⊢ Ⅎ𝑥(𝜑 ∧ 𝑦 ∈ 𝐴)
11		nfcv 2898	. . . . . . 7 ⊢ Ⅎ𝑥𝑦
12	11	nfcsb1 3860	. . . . . 6 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵
13		nfcv 2898	. . . . . 6 ⊢ Ⅎ𝑥 ≤
14	11	nfcsb1 3860	. . . . . 6 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐶
15	12, 13, 14	nfbr 5132	. . . . 5 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶
16	10, 15	nfim 1898	. . . 4 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶)
17		eleq1w 2819	. . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ∈ 𝐴 ↔ 𝑦 ∈ 𝐴))
18	17	anbi2d 631	. . . . 5 ⊢ (𝑥 = 𝑦 → ((𝜑 ∧ 𝑥 ∈ 𝐴) ↔ (𝜑 ∧ 𝑦 ∈ 𝐴)))
19		csbeq1a 3851	. . . . . 6 ⊢ (𝑥 = 𝑦 → 𝐵 = ⦋𝑦 / 𝑥⦌𝐵)
20		csbeq1a 3851	. . . . . 6 ⊢ (𝑥 = 𝑦 → 𝐶 = ⦋𝑦 / 𝑥⦌𝐶)
21	19, 20	breq12d 5098	. . . . 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 2248	. . 3 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ≤ ⦋𝑦 / 𝑥⦌𝐶)
25		simpr 484	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → 𝑦 ∈ 𝐴)
26	12	nfel1 2915	. . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞)
27	10, 26	nfim 1898	. . . . . 6 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞))
28	19	eleq1d 2821	. . . . . . 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 2248	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞))
31	11, 12, 19, 4	fvmptf 6969	. . . . 5 ⊢ ((𝑦 ∈ 𝐴 ∧ ⦋𝑦 / 𝑥⦌𝐵 ∈ (0[,]+∞)) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐵)
32	25, 30, 31	syl2anc 585	. . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐵)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐵)
33		nfcv 2898	. . . . . . . 8 ⊢ Ⅎ𝑥(0[,]+∞)
34	14, 33	nfel 2913	. . . . . . 7 ⊢ Ⅎ𝑥⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞)
35	10, 34	nfim 1898	. . . . . 6 ⊢ Ⅎ𝑥((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞))
36	20	eleq1d 2821	. . . . . . 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 2248	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞))
39	11, 14, 20, 7	fvmptf 6969	. . . . 5 ⊢ ((𝑦 ∈ 𝐴 ∧ ⦋𝑦 / 𝑥⦌𝐶 ∈ (0[,]+∞)) → ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐶)
40	25, 38, 39	syl2anc 585	. . . 4 ⊢ ((𝜑 ∧ 𝑦 ∈ 𝐴) → ((𝑥 ∈ 𝐴 ↦ 𝐶)‘𝑦) = ⦋𝑦 / 𝑥⦌𝐶)
41	32, 40	breq12d 5098	. . 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 46835	1 ⊢ (𝜑 → (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐵)) ≤ (Σ^{^}‘(𝑥 ∈ 𝐴 ↦ 𝐶)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 Ⅎwnf 1785 ∈ wcel 2114 ⦋csb 3837 class class class wbr 5085 ↦ cmpt 5166 ‘cfv 6498 (class class class)co 7367 0cc0 11038 +∞cpnf 11176 ≤ cle 11180 [,]cicc 13301 Σ^{^}csumge0 46790

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 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-inf2 9562 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 ax-pre-sup 11116

This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-int 4890 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 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 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-isom 6507 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-sup 9355 df-oi 9425 df-card 9863 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-n0 12438 df-z 12525 df-uz 12789 df-rp 12943 df-ico 13304 df-icc 13305 df-fz 13462 df-fzo 13609 df-seq 13964 df-exp 14024 df-hash 14293 df-cj 15061 df-re 15062 df-im 15063 df-sqrt 15197 df-abs 15198 df-clim 15450 df-sum 15649 df-sumge0 46791

This theorem is referenced by: sge0iunmptlemre 46843 sge0xadd 46863 meaiunlelem 46896 hoicvrrex 46984 ovnsubaddlem1 46998 sge0hsphoire 47017 hoidmv1lelem1 47019 hoidmv1lelem2 47020 hoidmv1lelem3 47021 hoidmvlelem1 47023 hoidmvlelem2 47024 hoidmvlelem4 47026 hspmbllem2 47055 ovolval5lem1 47080

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