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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 7766 | . . . . 5 ⊢ 0 ∈ ℝ | |
2 | 0lt1 7889 | . . . . 5 ⊢ 0 < 1 | |
3 | 1, 2 | gtneii 7859 | . . . 4 ⊢ 1 ≠ 0 |
4 | 3 | neii 2310 | . . 3 ⊢ ¬ 1 = 0 |
5 | oveq2 5782 | . . . . . 6 ⊢ (i = 0 → (i · i) = (i · 0)) | |
6 | ax-icn 7715 | . . . . . . 7 ⊢ i ∈ ℂ | |
7 | 6 | mul01i 8153 | . . . . . 6 ⊢ (i · 0) = 0 |
8 | 5, 7 | syl6req 2189 | . . . . 5 ⊢ (i = 0 → 0 = (i · i)) |
9 | 8 | oveq1d 5789 | . . . 4 ⊢ (i = 0 → (0 + 1) = ((i · i) + 1)) |
10 | ax-1cn 7713 | . . . . 5 ⊢ 1 ∈ ℂ | |
11 | 10 | addid2i 7905 | . . . 4 ⊢ (0 + 1) = 1 |
12 | ax-i2m1 7725 | . . . 4 ⊢ ((i · i) + 1) = 0 | |
13 | 9, 11, 12 | 3eqtr3g 2195 | . . 3 ⊢ (i = 0 → 1 = 0) |
14 | 4, 13 | mto 651 | . 2 ⊢ ¬ i = 0 |
15 | 14 | neir 2311 | 1 ⊢ i ≠ 0 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 ≠ wne 2308 (class class class)co 5774 0cc0 7620 1c1 7621 ici 7622 + caddc 7623 · cmul 7625 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-cnex 7711 ax-resscn 7712 ax-1cn 7713 ax-1re 7714 ax-icn 7715 ax-addcl 7716 ax-addrcl 7717 ax-mulcl 7718 ax-addcom 7720 ax-mulcom 7721 ax-addass 7722 ax-distr 7724 ax-i2m1 7725 ax-0lt1 7726 ax-0id 7728 ax-rnegex 7729 ax-cnre 7731 ax-pre-ltirr 7732 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-reu 2423 df-rab 2425 df-v 2688 df-sbc 2910 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-br 3930 df-opab 3990 df-id 4215 df-xp 4545 df-rel 4546 df-cnv 4547 df-co 4548 df-dm 4549 df-iota 5088 df-fun 5125 df-fv 5131 df-riota 5730 df-ov 5777 df-oprab 5778 df-mpo 5779 df-pnf 7802 df-mnf 7803 df-ltxr 7805 df-sub 7935 |
This theorem is referenced by: inelr 8346 |
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