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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 11274 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2957 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7430 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11264 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11505 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2812 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7437 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11263 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11503 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11273 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2818 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 200 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2958 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1569 ≠ wne 2955 (class class class)co 7422 0cc0 11205 1c1 11206 ici 11207 + caddc 11208 · cmul 11210 |
| 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 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7753 ax-resscn 11262 ax-1cn 11263 ax-icn 11264 ax-addcl 11265 ax-addrcl 11266 ax-mulcl 11267 ax-mulrcl 11268 ax-mulcom 11269 ax-addass 11270 ax-mulass 11271 ax-distr 11272 ax-i2m1 11273 ax-1ne0 11274 ax-1rid 11275 ax-rnegex 11276 ax-rrecex 11277 ax-cnre 11278 ax-pre-lttri 11279 ax-pre-lttrn 11280 ax-pre-ltadd 11281 |
| 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 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3848 df-ss 3897 df-dif 4046 df-in 4090 df-un 4150 df-nul 4278 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-opab 5167 df-mpt 5186 df-id 5545 df-po 5558 df-so 5559 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-iota 6496 df-fun 6543 df-fn 6544 df-f 6545 df-f1 6546 df-fo 6547 df-f1o 6548 df-fv 6549 df-ov 7425 df-er 8722 df-en 8979 df-dom 8980 df-sdom 8981 df-pnf 11350 df-mnf 11351 df-ltxr 11353 |
| This theorem is used by: inelr 12315 2muline0 12576 irec 14350 iexpcyc 14356 imre 15282 reim 15283 crim 15289 cjreb 15297 cnpart 15414 tanval2 16308 tanval3 16309 efival 16327 sinhval 16329 retanhcl 16334 tanhlt1 16335 tanhbnd 16336 itgz 26108 ibl0 26114 iblcnlem1 26115 itgcnlem 26117 iblss 26132 iblss2 26133 itgss 26139 itgeqa 26141 iblconst 26145 iblabsr 26157 iblmulc2 26158 itgsplit 26163 dvsincos 26308 efeq1 26863 tanregt0 26874 efif1olem4 26880 logi 26922 eflogeq 26937 cxpsqrtlem 27037 root1eq1 27090 ang180lem1 27144 ang180lem2 27145 ang180lem3 27146 atandm2 27212 2efiatan 27253 atantan 27258 dvatan 27270 atantayl2 27273 log2cnv 27279 ccfldextdgrr 34352 constrelextdg2 34427 iconstr 34446 constrrecl 34449 cos9thpiminplylem3 34464 itgexpif 35283 iexpire 36594 iblmulc2nc 38710 ftc1anclem6 38723 ef11d 43497 cxpi11d 43501 proot1ex 44305 iblsplit 47083 sinh-conventional 51014 |
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