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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 11308 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2961 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7459 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11298 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11539 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2815 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7466 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11297 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11537 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11307 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2821 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 200 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2962 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ≠ wne 2959 (class class class)co 7451 0cc0 11239 1c1 11240 ici 11241 + caddc 11242 · cmul 11244 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-mpt 5193 df-id 5553 df-po 5566 df-so 5567 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-ov 7454 df-er 8755 df-en 9012 df-dom 9013 df-sdom 9014 df-pnf 11384 df-mnf 11385 df-ltxr 11387 |
| This theorem is used by: inelr 12350 2muline0 12611 irec 14385 iexpcyc 14391 imre 15318 reim 15319 crim 15325 cjreb 15333 cnpart 15450 tanval2 16345 tanval3 16346 efival 16364 sinhval 16366 retanhcl 16371 tanhlt1 16372 tanhbnd 16373 itgz 26156 ibl0 26162 iblcnlem1 26163 itgcnlem 26165 iblss 26180 iblss2 26181 itgss 26187 itgeqa 26189 iblconst 26193 iblabsr 26205 iblmulc2 26206 itgsplit 26211 dvsincos 26356 efeq1 26913 tanregt0 26924 efif1olem4 26930 logi 26972 eflogeq 26987 cxpsqrtlem 27087 root1eq1 27140 ang180lem1 27194 ang180lem2 27195 ang180lem3 27196 atandm2 27262 2efiatan 27303 atantan 27308 dvatan 27320 atantayl2 27323 log2cnv 27329 ccfldextdgrr 34415 constrelextdg2 34490 iconstr 34509 constrrecl 34512 cos9thpiminplylem3 34527 itgexpif 35346 iexpire 36715 iblmulc2nc 38871 ftc1anclem6 38884 ef11d 43656 cxpi11d 43660 proot1ex 44459 iblsplit 47249 sinh-conventional 51237 sinhf 51239 sinh0 51241 sinhneg 51242 tanhvaltan 51248 tanhvalnegitan 51253 sinhadd 51254 coshadd 51255 |
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