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| Mirrors > Home > MPE Home > Th. List > rlim0lt | Structured version Visualization version GIF version | ||
| Description: Use strictly less-than in place of less equal in the real limit predicate. (Contributed by Mario Carneiro, 18-Sep-2014.) (Revised by Mario Carneiro, 28-Feb-2015.) |
| Ref | Expression |
|---|---|
| rlim0.1 | ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ ℂ) |
| rlim0.2 | ⊢ (𝜑 → 𝐴 ⊆ ℝ) |
| Ref | Expression |
|---|---|
| rlim0lt | ⊢ (𝜑 → ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 0 ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rlim0.1 | . . 3 ⊢ (𝜑 → ∀𝑧 ∈ 𝐴 𝐵 ∈ ℂ) | |
| 2 | rlim0.2 | . . 3 ⊢ (𝜑 → 𝐴 ⊆ ℝ) | |
| 3 | 0cnd 11309 | . . 3 ⊢ (𝜑 → 0 ∈ ℂ) | |
| 4 | 1, 2, 3 | rlim2lt 15676 | . 2 ⊢ (𝜑 → ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 0 ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥))) |
| 5 | subid1 11588 | . . . . . . . . 9 ⊢ (𝐵 ∈ ℂ → (𝐵 − 0) = 𝐵) | |
| 6 | 5 | fveq2d 6897 | . . . . . . . 8 ⊢ (𝐵 ∈ ℂ → (abs‘(𝐵 − 0)) = (abs‘𝐵)) |
| 7 | 6 | breq1d 5115 | . . . . . . 7 ⊢ (𝐵 ∈ ℂ → ((abs‘(𝐵 − 0)) < 𝑥 ↔ (abs‘𝐵) < 𝑥)) |
| 8 | 7 | imbi2d 343 | . . . . . 6 ⊢ (𝐵 ∈ ℂ → ((𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| 9 | 8 | ralimi 3102 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 𝐵 ∈ ℂ → ∀𝑧 ∈ 𝐴 ((𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| 10 | ralbi 3120 | . . . . 5 ⊢ (∀𝑧 ∈ 𝐴 ((𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥)) → (∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) | |
| 11 | 1, 9, 10 | 3syl 19 | . . . 4 ⊢ (𝜑 → (∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| 12 | 11 | rexbidv 3189 | . . 3 ⊢ (𝜑 → (∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| 13 | 12 | ralbidv 3188 | . 2 ⊢ (𝜑 → (∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘(𝐵 − 0)) < 𝑥) ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| 14 | 4, 13 | bitrd 282 | 1 ⊢ (𝜑 → ((𝑧 ∈ 𝐴 ↦ 𝐵) ⇝𝑟 0 ↔ ∀𝑥 ∈ ℝ+ ∃𝑦 ∈ ℝ ∀𝑧 ∈ 𝐴 (𝑦 < 𝑧 → (abs‘𝐵) < 𝑥))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∈ wcel 2146 ∀wral 3079 ∃wrex 3089 ⊆ wss 3899 class class class wbr 5105 ↦ cmpt 5188 ‘cfv 6546 (class class class)co 7427 ℂcc 11208 ℝcr 11209 0cc0 11210 < clt 11353 − cmin 11551 ℝ+crp 13130 abscabs 15413 ⇝𝑟 crli 15664 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-6 2001 ax-7 2042 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2196 ax-12 2215 ax-ext 2735 ax-sep 5251 ax-nul 5262 ax-pow 5330 ax-pr 5394 ax-un 7758 ax-cnex 11266 ax-resscn 11267 ax-1cn 11268 ax-icn 11269 ax-addcl 11270 ax-addrcl 11271 ax-mulcl 11272 ax-mulrcl 11273 ax-mulcom 11274 ax-addass 11275 ax-mulass 11276 ax-distr 11277 ax-i2m1 11278 ax-1ne0 11279 ax-1rid 11280 ax-rnegex 11281 ax-rrecex 11282 ax-cnre 11283 ax-pre-lttri 11284 ax-pre-lttrn 11285 ax-pre-ltadd 11286 ax-pre-mulgt0 11287 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2101 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-reu 3369 df-rab 3416 df-v 3455 df-sbc 3742 df-csb 3851 df-ss 3900 df-dif 4049 df-in 4093 df-un 4153 df-nul 4281 df-if 4485 df-pw 4561 df-sn 4588 df-pr 4590 df-op 4838 df-uni 4870 df-br 5106 df-opab 5170 df-mpt 5189 df-id 5549 df-po 5562 df-so 5563 df-xp 5660 df-rel 5661 df-cnv 5662 df-co 5663 df-dm 5664 df-rn 5665 df-res 5666 df-ima 5667 df-iota 6500 df-fun 6548 df-fn 6549 df-f 6550 df-f1 6551 df-fo 6552 df-f1o 6553 df-fv 6554 df-riota 7384 df-ov 7430 df-oprab 7431 df-mpo 7432 df-er 8728 df-pm 8861 df-en 8985 df-dom 8986 df-sdom 8987 df-pnf 11355 df-mnf 11356 df-xr 11357 df-ltxr 11358 df-le 11359 df-sub 11553 df-neg 11554 df-rlim 15668 |
| This theorem is used by: divrcnv 16033 divlogrlim 26975 cxplim 27311 cxploglim 27317 |
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