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| Mirrors > Home > MPE Home > Th. List > inelr | Structured version Visualization version GIF version | ||
| Description: The imaginary unit i is not a real number. (Contributed by NM, 6-May-1999.) |
| Ref | Expression |
|---|---|
| inelr | ⊢ ¬ i ∈ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | neg1lt0 12202 | . . . 4 ⊢ -1 < 0 | |
| 2 | neg1rr 12200 | . . . . 5 ⊢ -1 ∈ ℝ | |
| 3 | 0re 11206 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 4 | 2, 3 | ltnsymi 11325 | . . . 4 ⊢ (-1 < 0 → ¬ 0 < -1) |
| 5 | 1, 4 | ax-mp 5 | . . 3 ⊢ ¬ 0 < -1 |
| 6 | ixi 11839 | . . . 4 ⊢ (i · i) = -1 | |
| 7 | 6 | breq2i 5118 | . . 3 ⊢ (0 < (i · i) ↔ 0 < -1) |
| 8 | 5, 7 | mtbir 326 | . 2 ⊢ ¬ 0 < (i · i) |
| 9 | ine0 11645 | . . 3 ⊢ i ≠ 0 | |
| 10 | msqgt0 11730 | . . 3 ⊢ ((i ∈ ℝ ∧ i ≠ 0) → 0 < (i · i)) | |
| 11 | 9, 10 | mpan2 703 | . 2 ⊢ (i ∈ ℝ → 0 < (i · i)) |
| 12 | 8, 11 | mto 200 | 1 ⊢ ¬ i ∈ ℝ |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 ∈ wcel 2149 ≠ wne 2964 class class class wbr 5110 (class class class)co 7408 ℝcr 11095 0cc0 11096 1c1 11097 ici 11098 · cmul 11101 < clt 11239 -cneg 11438 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-opab 5175 df-mpt 5194 df-id 5554 df-po 5567 df-so 5568 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 |
| This theorem is referenced by: rimul 12205 nthruc 16304 areacirclem4 38245 ine1 42958 sqrtnegnre 47926 requad01 48268 |
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