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| Mirrors > Home > ILE Home > Th. List > ine0 | 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 | 0re 8316 | . . . . 5 ⊢ 0 ∈ ℝ | |
| 2 | 0lt1 8443 | . . . . 5 ⊢ 0 < 1 | |
| 3 | 1, 2 | gtneii 8411 | . . . 4 ⊢ 1 ≠ 0 |
| 4 | 3 | neii 2422 | . . 3 ⊢ ¬ 1 = 0 |
| 5 | oveq2 6083 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
| 6 | ax-icn 8264 | . . . . . . 7 ⊢ i ∈ ℂ | |
| 7 | 6 | mul01i 8708 | . . . . . 6 ⊢ (i · 0) = 0 |
| 8 | 5, 7 | eqtr2di 2288 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
| 9 | 8 | oveq1d 6090 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
| 10 | ax-1cn 8262 | . . . . 5 ⊢ 1 ∈ ℂ | |
| 11 | 10 | addlidi 8459 | . . . 4 ⊢ (0 + 1) = 1 |
| 12 | ax-i2m1 8274 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
| 13 | 9, 11, 12 | 3eqtr3g 2294 | . . 3 ⊢ (i = 0 → 1 = 0) |
| 14 | 4, 13 | mto 672 | . 2 ⊢ ¬ i = 0 |
| 15 | 14 | neir 2423 | 1 ⊢ i ≠ 0 |
| Colors of variables: wff set class |
| Syntax hints: = wceq 1402 ≠ wne 2420 (class class class)co 6075 0cc0 8169 1c1 8170 ici 8171 + caddc 8172 · cmul 8174 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-14 2212 ax-ext 2220 ax-sep 4244 ax-pow 4306 ax-pr 4341 ax-un 4573 ax-setind 4679 ax-cnex 8260 ax-resscn 8261 ax-1cn 8262 ax-1re 8263 ax-icn 8264 ax-addcl 8265 ax-addrcl 8266 ax-mulcl 8267 ax-addcom 8269 ax-mulcom 8270 ax-addass 8271 ax-distr 8273 ax-i2m1 8274 ax-0lt1 8275 ax-0id 8277 ax-rnegex 8278 ax-cnre 8280 ax-pre-ltirr 8281 |
| This theorem depends on definitions: df-bi 117 df-3an 1011 df-tru 1405 df-fal 1408 df-nf 1514 df-sb 1816 df-eu 2089 df-mo 2090 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-ne 2421 df-nel 2516 df-ral 2533 df-rex 2534 df-reu 2535 df-rab 2537 df-v 2823 df-sbc 3052 df-dif 3222 df-un 3224 df-in 3226 df-ss 3233 df-pw 3687 df-sn 3711 df-pr 3712 df-op 3714 df-uni 3931 df-br 4126 df-opab 4188 df-id 4433 df-xp 4775 df-rel 4776 df-cnv 4777 df-co 4778 df-dm 4779 df-iota 5332 df-fun 5374 df-fv 5380 df-riota 6028 df-ov 6078 df-oprab 6079 df-mpo 6080 df-pnf 8352 df-mnf 8353 df-ltxr 8355 df-sub 8489 |
| This theorem is referenced by: inelr 8902 |
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