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| Mirrors > Home > MPE Home > Th. List > ine0 | Structured version Visualization version GIF version | ||
| Description: The imaginary unit i is not zero. (Contributed by NM, 6-May-1999.) |
| Ref | Expression |
|---|---|
| ine0 | ⊢ i ≠ 0 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1ne0 11165 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2966 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7416 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11155 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11396 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2821 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7423 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11154 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11394 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11164 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2827 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 200 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2967 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1567 ≠ wne 2964 (class class class)co 7408 0cc0 11096 1c1 11097 ici 11098 + caddc 11099 · cmul 11101 |
| 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 |
| 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-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 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-ov 7411 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-ltxr 11244 |
| This theorem is referenced by: inelr 12204 2muline0 12465 irec 14233 iexpcyc 14239 imre 15155 reim 15156 crim 15162 cjreb 15170 cnpart 15287 tanval2 16185 tanval3 16186 efival 16204 sinhval 16206 retanhcl 16211 tanhlt1 16212 tanhbnd 16213 itgz 25905 ibl0 25911 iblcnlem1 25912 itgcnlem 25914 iblss 25929 iblss2 25930 itgss 25936 itgeqa 25938 iblconst 25942 iblabsr 25954 iblmulc2 25955 itgsplit 25960 dvsincos 26105 efeq1 26655 tanregt0 26666 efif1olem4 26672 logi 26714 eflogeq 26729 cxpsqrtlem 26829 root1eq1 26882 ang180lem1 26936 ang180lem2 26937 ang180lem3 26938 atandm2 27004 2efiatan 27045 atantan 27050 dvatan 27062 atantayl2 27065 log2cnv 27071 ccfldextdgrr 34003 constrelextdg2 34078 iconstr 34097 constrrecl 34100 cos9thpiminplylem3 34115 itgexpif 34934 iexpire 36122 iblmulc2nc 38219 ftc1anclem6 38232 ef11d 42985 cxpi11d 42989 proot1ex 43810 iblsplit 46567 sinh-conventional 50397 |
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