Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > 0cn | GIF version |
Description: 0 is a complex number. (Contributed by NM, 19-Feb-2005.) |
Ref | Expression |
---|---|
0cn | ⊢ 0 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-i2m1 7081 | . 2 ⊢ ((i · i) + 1) = 0 | |
2 | ax-icn 7071 | . . . 4 ⊢ i ∈ ℂ | |
3 | mulcl 7100 | . . . 4 ⊢ ((i ∈ ℂ ∧ i ∈ ℂ) → (i · i) ∈ ℂ) | |
4 | 2, 2, 3 | mp2an 416 | . . 3 ⊢ (i · i) ∈ ℂ |
5 | ax-1cn 7069 | . . 3 ⊢ 1 ∈ ℂ | |
6 | addcl 7098 | . . 3 ⊢ (((i · i) ∈ ℂ ∧ 1 ∈ ℂ) → ((i · i) + 1) ∈ ℂ) | |
7 | 4, 5, 6 | mp2an 416 | . 2 ⊢ ((i · i) + 1) ∈ ℂ |
8 | 1, 7 | eqeltrri 2152 | 1 ⊢ 0 ∈ ℂ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1433 (class class class)co 5532 ℂcc 6979 0cc0 6981 1c1 6982 ici 6983 + caddc 6984 · cmul 6986 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-4 1440 ax-17 1459 ax-ial 1467 ax-ext 2063 ax-1cn 7069 ax-icn 7071 ax-addcl 7072 ax-mulcl 7074 ax-i2m1 7081 |
This theorem depends on definitions: df-bi 115 df-cleq 2074 df-clel 2077 |
This theorem is referenced by: 0cnd 7112 c0ex 7113 addid2 7247 00id 7249 cnegexlem2 7284 negcl 7308 subid 7327 subid1 7328 neg0 7354 negid 7355 negsub 7356 subneg 7357 negneg 7358 negeq0 7362 negsubdi 7364 renegcl 7369 mul02 7491 mul01 7493 mulneg1 7499 ixi 7683 negap0 7729 muleqadd 7758 divvalap 7762 div0ap 7790 recgt0 7928 0m0e0 8151 2muline0 8256 elznn0 8366 iser0 9471 0exp0e1 9481 expeq0 9507 0exp 9511 sq0 9566 ibcval5 9690 shftval3 9715 shftidt2 9720 cjap0 9794 cjne0 9795 abs0 9944 abs00 9950 abs2dif 9992 clim0 10124 climz 10131 iserclim0 10144 |
Copyright terms: Public domain | W3C validator |