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Mirrors > Home > MPE Home > Th. List > infcvgaux1i | Structured version Visualization version GIF version |
Description: Auxiliary theorem for applications of supcvg 15496. 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 11332 | . . . . . 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 3208 | . . . 4 ⊢ (∃𝑦 ∈ 𝑋 𝑥 = -𝐴 → 𝑥 ∈ ℝ) |
7 | 6 | abssi 3999 | . . 3 ⊢ {𝑥 ∣ ∃𝑦 ∈ 𝑋 𝑥 = -𝐴} ⊆ ℝ |
8 | 1, 7 | eqsstri 3951 | . 2 ⊢ 𝑅 ⊆ ℝ |
9 | infcvg.3 | . . . . . 6 ⊢ 𝑍 ∈ 𝑋 | |
10 | eqid 2738 | . . . . . 6 ⊢ -⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴 | |
11 | 10 | nfth 1805 | . . . . . . 7 ⊢ Ⅎ𝑦-⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴 |
12 | csbeq1a 3842 | . . . . . . . . 9 ⊢ (𝑦 = 𝑍 → 𝐴 = ⦋𝑍 / 𝑦⦌𝐴) | |
13 | 12 | negeqd 11145 | . . . . . . . 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 3540 | . . . . . 6 ⊢ ((𝑍 ∈ 𝑋 ∧ -⦋𝑍 / 𝑦⦌𝐴 = -⦋𝑍 / 𝑦⦌𝐴) → ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴) |
16 | 9, 10, 15 | mp2an 688 | . . . . 5 ⊢ ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴 |
17 | negex 11149 | . . . . . 6 ⊢ -⦋𝑍 / 𝑦⦌𝐴 ∈ V | |
18 | nfcsb1v 3853 | . . . . . . . . 9 ⊢ Ⅎ𝑦⦋𝑍 / 𝑦⦌𝐴 | |
19 | 18 | nfneg 11147 | . . . . . . . 8 ⊢ Ⅎ𝑦-⦋𝑍 / 𝑦⦌𝐴 |
20 | 19 | nfeq2 2923 | . . . . . . 7 ⊢ Ⅎ𝑦 𝑥 = -⦋𝑍 / 𝑦⦌𝐴 |
21 | eqeq1 2742 | . . . . . . 7 ⊢ (𝑥 = -⦋𝑍 / 𝑦⦌𝐴 → (𝑥 = -𝐴 ↔ -⦋𝑍 / 𝑦⦌𝐴 = -𝐴)) | |
22 | 20, 21 | rexbid 3248 | . . . . . 6 ⊢ (𝑥 = -⦋𝑍 / 𝑦⦌𝐴 → (∃𝑦 ∈ 𝑋 𝑥 = -𝐴 ↔ ∃𝑦 ∈ 𝑋 -⦋𝑍 / 𝑦⦌𝐴 = -𝐴)) |
23 | 17, 22 | elab 3602 | . . . . 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 4268 | . 2 ⊢ 𝑅 ≠ ∅ |
27 | infcvg.4 | . 2 ⊢ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧 | |
28 | 8, 26, 27 | 3pm3.2i 1337 | 1 ⊢ (𝑅 ⊆ ℝ ∧ 𝑅 ≠ ∅ ∧ ∃𝑧 ∈ ℝ ∀𝑤 ∈ 𝑅 𝑤 ≤ 𝑧) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1085 = wceq 1539 ∈ wcel 2108 {cab 2715 ≠ wne 2942 ∀wral 3063 ∃wrex 3064 ⦋csb 3828 ⊆ wss 3883 ∅c0 4253 class class class wbr 5070 ℝcr 10801 ≤ cle 10941 -cneg 11136 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1799 ax-4 1813 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2110 ax-9 2118 ax-10 2139 ax-11 2156 ax-12 2173 ax-ext 2709 ax-sep 5218 ax-nul 5225 ax-pow 5283 ax-pr 5347 ax-un 7566 ax-resscn 10859 ax-1cn 10860 ax-icn 10861 ax-addcl 10862 ax-addrcl 10863 ax-mulcl 10864 ax-mulrcl 10865 ax-mulcom 10866 ax-addass 10867 ax-mulass 10868 ax-distr 10869 ax-i2m1 10870 ax-1ne0 10871 ax-1rid 10872 ax-rnegex 10873 ax-rrecex 10874 ax-cnre 10875 ax-pre-lttri 10876 ax-pre-lttrn 10877 ax-pre-ltadd 10878 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1784 df-nf 1788 df-sb 2069 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2817 df-nfc 2888 df-ne 2943 df-nel 3049 df-ral 3068 df-rex 3069 df-reu 3070 df-rab 3072 df-v 3424 df-sbc 3712 df-csb 3829 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4254 df-if 4457 df-pw 4532 df-sn 4559 df-pr 4561 df-op 4565 df-uni 4837 df-br 5071 df-opab 5133 df-mpt 5154 df-id 5480 df-po 5494 df-so 5495 df-xp 5586 df-rel 5587 df-cnv 5588 df-co 5589 df-dm 5590 df-rn 5591 df-res 5592 df-ima 5593 df-iota 6376 df-fun 6420 df-fn 6421 df-f 6422 df-f1 6423 df-fo 6424 df-f1o 6425 df-fv 6426 df-riota 7212 df-ov 7258 df-oprab 7259 df-mpo 7260 df-er 8456 df-en 8692 df-dom 8693 df-sdom 8694 df-pnf 10942 df-mnf 10943 df-ltxr 10945 df-sub 11137 df-neg 11138 |
This theorem is referenced by: infcvgaux2i 15498 |
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