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| Mirrors > Home > MPE Home > Th. List > 7cn | Structured version Visualization version GIF version | ||
| Description: The number 7 is a complex number. (Contributed by David A. Wheeler, 8-Dec-2018.) Reduce dependencies on axioms. (Revised by Steven Nguyen, 4-Oct-2022.) |
| Ref | Expression |
|---|---|
| 7cn | ⊢ 7 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-7 12249 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12272 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11096 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11151 | . 2 ⊢ (6 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7367 ℂcc 11036 1c1 11039 + caddc 11041 6c6 12240 7c7 12241 |
| 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-ext 2708 ax-1cn 11096 ax-addcl 11098 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2728 df-clel 2811 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 |
| This theorem is referenced by: 8cn 12278 8m1e7 12309 7p2e9 12337 7p3e10 12719 7t2e14 12753 7t4e28 12755 7t7e49 12758 cos2bnd 16155 23prm 17089 139prm 17094 163prm 17095 317prm 17096 631prm 17097 1259lem1 17101 1259lem2 17102 1259lem3 17103 1259lem4 17104 1259lem5 17105 1259prm 17106 2503lem1 17107 2503lem2 17108 2503lem3 17109 4001lem1 17111 4001lem4 17114 4001prm 17115 log2ublem3 26912 log2ub 26913 bclbnd 27243 bposlem8 27254 2lgslem3d 27362 ex-prmo 30529 hgt750lem 34795 hgt750lem2 34796 60lcm7e420 42449 3exp7 42492 3lexlogpow5ineq1 42493 aks4d1p1 42515 sq7 42728 235t711 42737 ex-decpmul 42738 3cubeslem3r 43119 fmtno5lem4 48019 257prm 48024 fmtno4nprmfac193 48037 fmtno5fac 48045 m3prm 48055 139prmALT 48059 127prm 48062 m7prm 48063 ppivalnn4 48090 2exp340mod341 48209 8exp8mod9 48212 |
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