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Mirrors > Home > MPE Home > Th. List > metdscnlem | Structured version Visualization version GIF version |
Description: Lemma for metdscn 24019. (Contributed by Mario Carneiro, 4-Sep-2015.) |
Ref | Expression |
---|---|
metdscn.f | ⊢ 𝐹 = (𝑥 ∈ 𝑋 ↦ inf(ran (𝑦 ∈ 𝑆 ↦ (𝑥𝐷𝑦)), ℝ*, < )) |
metdscn.j | ⊢ 𝐽 = (MetOpen‘𝐷) |
metdscn.c | ⊢ 𝐶 = (dist‘ℝ*𝑠) |
metdscn.k | ⊢ 𝐾 = (MetOpen‘𝐶) |
metdscnlem.1 | ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋)) |
metdscnlem.2 | ⊢ (𝜑 → 𝑆 ⊆ 𝑋) |
metdscnlem.3 | ⊢ (𝜑 → 𝐴 ∈ 𝑋) |
metdscnlem.4 | ⊢ (𝜑 → 𝐵 ∈ 𝑋) |
metdscnlem.5 | ⊢ (𝜑 → 𝑅 ∈ ℝ+) |
metdscnlem.6 | ⊢ (𝜑 → (𝐴𝐷𝐵) < 𝑅) |
Ref | Expression |
---|---|
metdscnlem | ⊢ (𝜑 → ((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) < 𝑅) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | metdscnlem.1 | . . . . . 6 ⊢ (𝜑 → 𝐷 ∈ (∞Met‘𝑋)) | |
2 | metdscnlem.2 | . . . . . 6 ⊢ (𝜑 → 𝑆 ⊆ 𝑋) | |
3 | metdscn.f | . . . . . . 7 ⊢ 𝐹 = (𝑥 ∈ 𝑋 ↦ inf(ran (𝑦 ∈ 𝑆 ↦ (𝑥𝐷𝑦)), ℝ*, < )) | |
4 | 3 | metdsf 24011 | . . . . . 6 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑆 ⊆ 𝑋) → 𝐹:𝑋⟶(0[,]+∞)) |
5 | 1, 2, 4 | syl2anc 584 | . . . . 5 ⊢ (𝜑 → 𝐹:𝑋⟶(0[,]+∞)) |
6 | metdscnlem.3 | . . . . 5 ⊢ (𝜑 → 𝐴 ∈ 𝑋) | |
7 | 5, 6 | ffvelrnd 6962 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐴) ∈ (0[,]+∞)) |
8 | eliccxr 13167 | . . . 4 ⊢ ((𝐹‘𝐴) ∈ (0[,]+∞) → (𝐹‘𝐴) ∈ ℝ*) | |
9 | 7, 8 | syl 17 | . . 3 ⊢ (𝜑 → (𝐹‘𝐴) ∈ ℝ*) |
10 | metdscnlem.4 | . . . . . 6 ⊢ (𝜑 → 𝐵 ∈ 𝑋) | |
11 | 5, 10 | ffvelrnd 6962 | . . . . 5 ⊢ (𝜑 → (𝐹‘𝐵) ∈ (0[,]+∞)) |
12 | eliccxr 13167 | . . . . 5 ⊢ ((𝐹‘𝐵) ∈ (0[,]+∞) → (𝐹‘𝐵) ∈ ℝ*) | |
13 | 11, 12 | syl 17 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐵) ∈ ℝ*) |
14 | 13 | xnegcld 13034 | . . 3 ⊢ (𝜑 → -𝑒(𝐹‘𝐵) ∈ ℝ*) |
15 | 9, 14 | xaddcld 13035 | . 2 ⊢ (𝜑 → ((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) ∈ ℝ*) |
16 | xmetcl 23484 | . . 3 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴𝐷𝐵) ∈ ℝ*) | |
17 | 1, 6, 10, 16 | syl3anc 1370 | . 2 ⊢ (𝜑 → (𝐴𝐷𝐵) ∈ ℝ*) |
18 | metdscnlem.5 | . . 3 ⊢ (𝜑 → 𝑅 ∈ ℝ+) | |
19 | 18 | rpxrd 12773 | . 2 ⊢ (𝜑 → 𝑅 ∈ ℝ*) |
20 | 3 | metdstri 24014 | . . . 4 ⊢ (((𝐷 ∈ (∞Met‘𝑋) ∧ 𝑆 ⊆ 𝑋) ∧ (𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋)) → (𝐹‘𝐴) ≤ ((𝐴𝐷𝐵) +𝑒 (𝐹‘𝐵))) |
21 | 1, 2, 6, 10, 20 | syl22anc 836 | . . 3 ⊢ (𝜑 → (𝐹‘𝐴) ≤ ((𝐴𝐷𝐵) +𝑒 (𝐹‘𝐵))) |
22 | elxrge0 13189 | . . . . . 6 ⊢ ((𝐹‘𝐴) ∈ (0[,]+∞) ↔ ((𝐹‘𝐴) ∈ ℝ* ∧ 0 ≤ (𝐹‘𝐴))) | |
23 | 22 | simprbi 497 | . . . . 5 ⊢ ((𝐹‘𝐴) ∈ (0[,]+∞) → 0 ≤ (𝐹‘𝐴)) |
24 | 7, 23 | syl 17 | . . . 4 ⊢ (𝜑 → 0 ≤ (𝐹‘𝐴)) |
25 | elxrge0 13189 | . . . . . . 7 ⊢ ((𝐹‘𝐵) ∈ (0[,]+∞) ↔ ((𝐹‘𝐵) ∈ ℝ* ∧ 0 ≤ (𝐹‘𝐵))) | |
26 | 25 | simprbi 497 | . . . . . 6 ⊢ ((𝐹‘𝐵) ∈ (0[,]+∞) → 0 ≤ (𝐹‘𝐵)) |
27 | 11, 26 | syl 17 | . . . . 5 ⊢ (𝜑 → 0 ≤ (𝐹‘𝐵)) |
28 | ge0nemnf 12907 | . . . . 5 ⊢ (((𝐹‘𝐵) ∈ ℝ* ∧ 0 ≤ (𝐹‘𝐵)) → (𝐹‘𝐵) ≠ -∞) | |
29 | 13, 27, 28 | syl2anc 584 | . . . 4 ⊢ (𝜑 → (𝐹‘𝐵) ≠ -∞) |
30 | xmetge0 23497 | . . . . 5 ⊢ ((𝐷 ∈ (∞Met‘𝑋) ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → 0 ≤ (𝐴𝐷𝐵)) | |
31 | 1, 6, 10, 30 | syl3anc 1370 | . . . 4 ⊢ (𝜑 → 0 ≤ (𝐴𝐷𝐵)) |
32 | xlesubadd 12997 | . . . 4 ⊢ ((((𝐹‘𝐴) ∈ ℝ* ∧ (𝐹‘𝐵) ∈ ℝ* ∧ (𝐴𝐷𝐵) ∈ ℝ*) ∧ (0 ≤ (𝐹‘𝐴) ∧ (𝐹‘𝐵) ≠ -∞ ∧ 0 ≤ (𝐴𝐷𝐵))) → (((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) ≤ (𝐴𝐷𝐵) ↔ (𝐹‘𝐴) ≤ ((𝐴𝐷𝐵) +𝑒 (𝐹‘𝐵)))) | |
33 | 9, 13, 17, 24, 29, 31, 32 | syl33anc 1384 | . . 3 ⊢ (𝜑 → (((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) ≤ (𝐴𝐷𝐵) ↔ (𝐹‘𝐴) ≤ ((𝐴𝐷𝐵) +𝑒 (𝐹‘𝐵)))) |
34 | 21, 33 | mpbird 256 | . 2 ⊢ (𝜑 → ((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) ≤ (𝐴𝐷𝐵)) |
35 | metdscnlem.6 | . 2 ⊢ (𝜑 → (𝐴𝐷𝐵) < 𝑅) | |
36 | 15, 17, 19, 34, 35 | xrlelttrd 12894 | 1 ⊢ (𝜑 → ((𝐹‘𝐴) +𝑒 -𝑒(𝐹‘𝐵)) < 𝑅) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 = wceq 1539 ∈ wcel 2106 ≠ wne 2943 ⊆ wss 3887 class class class wbr 5074 ↦ cmpt 5157 ran crn 5590 ⟶wf 6429 ‘cfv 6433 (class class class)co 7275 infcinf 9200 0cc0 10871 +∞cpnf 11006 -∞cmnf 11007 ℝ*cxr 11008 < clt 11009 ≤ cle 11010 ℝ+crp 12730 -𝑒cxne 12845 +𝑒 cxad 12846 [,]cicc 13082 distcds 16971 ℝ*𝑠cxrs 17211 ∞Metcxmet 20582 MetOpencmopn 20587 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-sep 5223 ax-nul 5230 ax-pow 5288 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-resscn 10928 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-addrcl 10932 ax-mulcl 10933 ax-mulrcl 10934 ax-mulcom 10935 ax-addass 10936 ax-mulass 10937 ax-distr 10938 ax-i2m1 10939 ax-1ne0 10940 ax-1rid 10941 ax-rnegex 10942 ax-rrecex 10943 ax-cnre 10944 ax-pre-lttri 10945 ax-pre-lttrn 10946 ax-pre-ltadd 10947 ax-pre-mulgt0 10948 ax-pre-sup 10949 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-rmo 3071 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-id 5489 df-po 5503 df-so 5504 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-riota 7232 df-ov 7278 df-oprab 7279 df-mpo 7280 df-1st 7831 df-2nd 7832 df-er 8498 df-ec 8500 df-map 8617 df-en 8734 df-dom 8735 df-sdom 8736 df-sup 9201 df-inf 9202 df-pnf 11011 df-mnf 11012 df-xr 11013 df-ltxr 11014 df-le 11015 df-sub 11207 df-neg 11208 df-div 11633 df-2 12036 df-rp 12731 df-xneg 12848 df-xadd 12849 df-xmul 12850 df-icc 13086 df-psmet 20589 df-xmet 20590 df-bl 20592 |
This theorem is referenced by: metdscn 24019 |
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