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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 11262 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2958 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7426 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11252 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11493 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2813 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7433 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11251 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11491 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11261 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2819 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 200 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2959 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ≠ wne 2956 (class class class)co 7418 0cc0 11193 1c1 11194 ici 11195 + caddc 11196 · cmul 11198 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7749 ax-resscn 11250 ax-1cn 11251 ax-icn 11252 ax-addcl 11253 ax-addrcl 11254 ax-mulcl 11255 ax-mulrcl 11256 ax-mulcom 11257 ax-addass 11258 ax-mulass 11259 ax-distr 11260 ax-i2m1 11261 ax-1ne0 11262 ax-1rid 11263 ax-rnegex 11264 ax-rrecex 11265 ax-cnre 11266 ax-pre-lttri 11267 ax-pre-lttrn 11268 ax-pre-ltadd 11269 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-mpt 5187 df-id 5546 df-po 5559 df-so 5560 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-ov 7421 df-er 8710 df-en 8967 df-dom 8968 df-sdom 8969 df-pnf 11338 df-mnf 11339 df-ltxr 11341 |
| This theorem is used by: inelr 12303 2muline0 12564 irec 14338 iexpcyc 14344 imre 15268 reim 15269 crim 15275 cjreb 15283 cnpart 15400 tanval2 16294 tanval3 16295 efival 16313 sinhval 16315 retanhcl 16320 tanhlt1 16321 tanhbnd 16322 itgz 26094 ibl0 26100 iblcnlem1 26101 itgcnlem 26103 iblss 26118 iblss2 26119 itgss 26125 itgeqa 26127 iblconst 26131 iblabsr 26143 iblmulc2 26144 itgsplit 26149 dvsincos 26294 efeq1 26849 tanregt0 26860 efif1olem4 26866 logi 26908 eflogeq 26923 cxpsqrtlem 27023 root1eq1 27076 ang180lem1 27130 ang180lem2 27131 ang180lem3 27132 atandm2 27198 2efiatan 27239 atantan 27244 dvatan 27256 atantayl2 27259 log2cnv 27265 ccfldextdgrr 34297 constrelextdg2 34372 iconstr 34391 constrrecl 34394 cos9thpiminplylem3 34409 itgexpif 35228 iexpire 36479 iblmulc2nc 38583 ftc1anclem6 38596 ef11d 43370 cxpi11d 43374 proot1ex 44182 iblsplit 46945 sinh-conventional 50801 |
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