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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 11107 | . . . 4 ⊢ 1 ≠ 0 | |
| 2 | 1 | neii 2935 | . . 3 ⊢ ¬ 1 = 0 |
| 3 | oveq2 7376 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 4 | ax-icn 11097 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 5 | 4 | mul01i 11335 | . . . . . 6 ⊢ (i · 0) = 0 |
| 6 | 3, 5 | eqtr2di 2789 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 7 | 6 | oveq1d 7383 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 8 | ax-1cn 11096 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 9 | 8 | addlidi 11333 | . . . 4 ⊢ (0 + 1) = 1 |
| 10 | ax-i2m1 11106 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 11 | 7, 9, 10 | 3eqtr3g 2795 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 12 | 2, 11 | mto 197 | . 2 ⊢ ¬ i = 0 |
| 13 | 12 | neir 2936 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1542 ≠ wne 2933 (class class class)co 7368 0cc0 11038 1c1 11039 ici 11040 + caddc 11041 · cmul 11043 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-mpt 5182 df-id 5527 df-po 5540 df-so 5541 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-ltxr 11183 |
| This theorem is referenced by: inelr 12147 2muline0 12378 irec 14136 iexpcyc 14142 imre 15043 reim 15044 crim 15050 cjreb 15058 cnpart 15175 tanval2 16070 tanval3 16071 efival 16089 sinhval 16091 retanhcl 16096 tanhlt1 16097 tanhbnd 16098 itgz 25750 ibl0 25756 iblcnlem1 25757 itgcnlem 25759 iblss 25774 iblss2 25775 itgss 25781 itgeqa 25783 iblconst 25787 iblabsr 25799 iblmulc2 25800 itgsplit 25805 dvsincos 25953 efeq1 26505 tanregt0 26516 efif1olem4 26522 logi 26564 eflogeq 26579 cxpsqrtlem 26679 root1eq1 26733 ang180lem1 26787 ang180lem2 26788 ang180lem3 26789 atandm2 26855 2efiatan 26896 atantan 26901 dvatan 26913 atantayl2 26916 log2cnv 26922 ccfldextdgrr 33850 constrelextdg2 33925 iconstr 33944 constrrecl 33947 cos9thpiminplylem3 33962 itgexpif 34784 iexpire 35951 iblmulc2nc 37936 ftc1anclem6 37949 ef11d 42709 cxpi11d 42713 proot1ex 43553 iblsplit 46324 sinh-conventional 50098 |
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