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Mirrors > Home > MPE Home > Th. List > infcvgaux1i | Structured version Visualization version GIF version |
Description: Auxiliary theorem for applications of supcvg 15568. Hypothesis for several supremum theorems. (Contributed by NM, 8-Feb-2008.) |
Ref | Expression |
---|---|
infcvg.1 | ⊢ 𝑅 = {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} |
infcvg.2 | ⊢ (𝑦 ∈ 𝑋 → 𝐴 ∈ ℝ) |
infcvg.3 | ⊢ 𝑍 ∈ 𝑋 |
infcvg.4 | ⊢ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧 |
Ref | Expression |
---|---|
infcvgaux1i | ⊢ (𝑅 ⊆ ℝ ∧ 𝑅 ≠ ∅ ∧ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | infcvg.1 | . . 3 ⊢ 𝑅 = {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} | |
2 | infcvg.2 | . . . . . . 7 ⊢ (𝑦 ∈ 𝑋 → 𝐴 ∈ ℝ) | |
3 | 2 | renegcld 11402 | . . . . . 6 ⊢ (𝑦 ∈ 𝑋 → -𝐴 ∈ ℝ) |
4 | eleq1 2826 | . . . . . 6 ⊢ (𝑥 = -𝐴 → (𝑥 ∈ ℝ ↔ -𝐴 ∈ ℝ)) | |
5 | 3, 4 | syl5ibrcom 246 | . . . . 5 ⊢ (𝑦 ∈ 𝑋 → (𝑥 = -𝐴 → 𝑥 ∈ ℝ)) |
6 | 5 | rexlimiv 3209 | . . . 4 ⊢ (∃𝑦 ∈ 𝑋 𝑥 = -𝐴 → 𝑥 ∈ ℝ) |
7 | 6 | abssi 4003 | . . 3 ⊢ {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} ⊆ ℝ |
8 | 1, 7 | eqsstri 3955 | . 2 ⊢ 𝑅 ⊆ ℝ |
9 | infcvg.3 | . . . . . 6 ⊢ 𝑍 ∈ 𝑋 | |
10 | eqid 2738 | . . . . . 6 ⊢ -⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴 | |
11 | 10 | nfth 1804 | . . . . . . 7 ⊢ Ⅎ𝑦-⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴 |
12 | csbeq1a 3846 | . . . . . . . . 9 ⊢ (𝑦 = 𝑍 → 𝐴 = ⦋𝑍 / 𝑦⦌𝐴) | |
13 | 12 | negeqd 11215 | . . . . . . . 8 ⊢ (𝑦 = 𝑍 → -𝐴 = -⦋𝑍 / 𝑦⦌𝐴) |
14 | 13 | eqeq2d 2749 | . . . . . . 7 ⊢ (𝑦 = 𝑍 → (-⦋𝑍 / 𝑦⦌𝐴 = -𝐴 ↔ -⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴)) |
15 | 11, 14 | rspce 3550 | . . . . . 6 ⊢ ((𝑍 ∈ 𝑋 ∧ -⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴) → ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴) |
16 | 9, 10, 15 | mp2an 689 | . . . . 5 ⊢ ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴 |
17 | negex 11219 | . . . . . 6 ⊢ -⦋𝑍 / 𝑦⦌𝐴 ∈ V | |
18 | nfcsb1v 3857 | . . . . . . . . 9 ⊢ Ⅎ𝑦⦋𝑍 / 𝑦⦌𝐴 | |
19 | 18 | nfneg 11217 | . . . . . . . 8 ⊢ Ⅎ𝑦-⦋𝑍 / 𝑦⦌𝐴 |
20 | 19 | nfeq2 2924 | . . . . . . 7 ⊢ Ⅎ𝑦 𝑥 = -⦋𝑍 / 𝑦⦌𝐴 |
21 | eqeq1 2742 | . . . . . . 7 ⊢ (𝑥 = -⦋𝑍 / 𝑦⦌𝐴 → (𝑥 = -𝐴 ↔ -⦋𝑍 / 𝑦⦌𝐴 = -𝐴)) | |
22 | 20, 21 | rexbid 3253 | . . . . . 6 ⊢ (𝑥 = -⦋𝑍 / 𝑦⦌𝐴 → (∃𝑦 ∈ 𝑋 𝑥 = -𝐴 ↔ ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴)) |
23 | 17, 22 | elab 3609 | . . . . 5 ⊢ (-⦋𝑍 / 𝑦⦌𝐴 ∈ {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} ↔ ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴) |
24 | 16, 23 | mpbir 230 | . . . 4 ⊢ -⦋𝑍 / 𝑦⦌𝐴 ∈ {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} |
25 | 24, 1 | eleqtrri 2838 | . . 3 ⊢ -⦋𝑍 / 𝑦⦌𝐴 ∈ 𝑅 |
26 | 25 | ne0ii 4271 | . 2 ⊢ 𝑅 ≠ ∅ |
27 | infcvg.4 | . 2 ⊢ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧 | |
28 | 8, 26, 27 | 3pm3.2i 1338 | 1 ⊢ (𝑅 ⊆ ℝ ∧ 𝑅 ≠ ∅ ∧ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1086 = wceq 1539 ∈ wcel 2106 {cab 2715 ≠ wne 2943 ∀wral 3064 ∃wrex 3065 ⦋csb 3832 ⊆ wss 3887 ∅c0 4256 class class class wbr 5074 ℝcr 10870 ≤ cle 11010 -cneg 11206 |
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-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 |
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-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-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-er 8498 df-en 8734 df-dom 8735 df-sdom 8736 df-pnf 11011 df-mnf 11012 df-ltxr 11014 df-sub 11207 df-neg 11208 |
This theorem is referenced by: infcvgaux2i 15570 |
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