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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 11180 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2962 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7424 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11170 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11411 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2817 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7431 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11169 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11409 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11179 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2823 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 200 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2963 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ≠ wne 2960 (class class class)co 7416 0cc0 11111 1c1 11112 ici 11113 + caddc 11114 · cmul 11116 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-po 5571 df-so 5572 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-ov 7419 df-er 8696 df-en 8946 df-dom 8947 df-sdom 8948 df-pnf 11256 df-mnf 11257 df-ltxr 11259 |
| This theorem is used by: inelr 12219 2muline0 12480 irec 14251 iexpcyc 14257 imre 15179 reim 15180 crim 15186 cjreb 15194 cnpart 15311 tanval2 16207 tanval3 16208 efival 16226 sinhval 16228 retanhcl 16233 tanhlt1 16234 tanhbnd 16235 itgz 25971 ibl0 25977 iblcnlem1 25978 itgcnlem 25980 iblss 25995 iblss2 25996 itgss 26002 itgeqa 26004 iblconst 26008 iblabsr 26020 iblmulc2 26021 itgsplit 26026 dvsincos 26171 efeq1 26724 tanregt0 26735 efif1olem4 26741 logi 26783 eflogeq 26798 cxpsqrtlem 26898 root1eq1 26951 ang180lem1 27005 ang180lem2 27006 ang180lem3 27007 atandm2 27073 2efiatan 27114 atantan 27119 dvatan 27131 atantayl2 27134 log2cnv 27140 ccfldextdgrr 34102 constrelextdg2 34177 iconstr 34196 constrrecl 34199 cos9thpiminplylem3 34214 itgexpif 35034 iexpire 36240 iblmulc2nc 38369 ftc1anclem6 38382 ef11d 43133 cxpi11d 43137 proot1ex 43956 iblsplit 46713 sinh-conventional 50550 |
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