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| Mirrors > Home > MPE Home > Th. List > logdmss | Structured version Visualization version GIF version | ||
| Description: The continuity domain of log is a subset of the regular domain of log. (Contributed by Mario Carneiro, 1-Mar-2015.) |
| Ref | Expression |
|---|---|
| logcn.d | ⊢ 𝐷 = (ℂ ∖ (-∞(,]0)) |
| Ref | Expression |
|---|---|
| logdmss | ⊢ 𝐷 ⊆ (ℂ ∖ {0}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | logcn.d | . . . . 5 ⊢ 𝐷 = (ℂ ∖ (-∞(,]0)) | |
| 2 | 1 | ellogdm 26815 | . . . 4 ⊢ (𝑥 ∈ 𝐷 ↔ (𝑥 ∈ ℂ ∧ (𝑥 ∈ ℝ → 𝑥 ∈ ℝ+))) |
| 3 | 2 | simplbi 501 | . . 3 ⊢ (𝑥 ∈ 𝐷 → 𝑥 ∈ ℂ) |
| 4 | 1 | logdmn0 26816 | . . 3 ⊢ (𝑥 ∈ 𝐷 → 𝑥 ≠ 0) |
| 5 | eldifsn 4752 | . . 3 ⊢ (𝑥 ∈ (ℂ ∖ {0}) ↔ (𝑥 ∈ ℂ ∧ 𝑥 ≠ 0)) | |
| 6 | 3, 4, 5 | sylanbrc 594 | . 2 ⊢ (𝑥 ∈ 𝐷 → 𝑥 ∈ (ℂ ∖ {0})) |
| 7 | 6 | ssriv 3940 | 1 ⊢ 𝐷 ⊆ (ℂ ∖ {0}) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2142 ≠ wne 2957 ∖ cdif 3901 ⊆ wss 3904 {csn 4588 (class class class)co 7412 ℂcc 11104 ℝcr 11105 0cc0 11106 -∞cmnf 11247 ℝ+crp 13022 (,]cioc 13379 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 ax-5 1939 ax-6 1996 ax-7 2037 ax-8 2144 ax-9 2152 ax-10 2175 ax-11 2191 ax-12 2212 ax-ext 2734 ax-sep 5256 ax-nul 5268 ax-pow 5335 ax-pr 5403 ax-un 7734 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-addrcl 11167 ax-rnegex 11177 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1103 df-3an 1104 df-tru 1572 df-fal 1582 df-ex 1809 df-nf 1813 df-sb 2096 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rab 3416 df-v 3456 df-sbc 3744 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4487 df-pw 4563 df-sn 4589 df-pr 4591 df-op 4595 df-uni 4872 df-br 5109 df-opab 5173 df-mpt 5192 df-id 5555 df-po 5568 df-so 5569 df-xp 5666 df-rel 5667 df-cnv 5668 df-co 5669 df-dm 5670 df-rn 5671 df-res 5672 df-ima 5673 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-ov 7415 df-oprab 7416 df-mpo 7417 df-er 8692 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11251 df-mnf 11252 df-xr 11253 df-ltxr 11254 df-le 11255 df-rp 13023 df-ioc 13383 |
| This theorem is used by: logcn 26823 dvloglem 26824 logf1o2 26826 dvlog 26827 dvlog2 26829 logtayl 26836 dvatan 27111 efrlim 27145 lgamcvg2 27230 readvrec 43151 |
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