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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 12240 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12263 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11087 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11142 | . 2 ⊢ (6 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2835 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2119 (class class class)co 7356 ℂcc 11027 1c1 11030 + caddc 11032 6c6 12231 7c7 12232 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-1cn 11087 ax-addcl 11089 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-ex 1787 df-cleq 2731 df-clel 2814 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 |
| This theorem is referenced by: 8cn 12269 8m1e7 12300 7p2e9 12328 7p3e10 12710 7t2e14 12744 7t4e28 12746 7t7e49 12749 cos2bnd 16146 23prm 17080 139prm 17085 163prm 17086 317prm 17087 631prm 17088 1259lem1 17092 1259lem2 17093 1259lem3 17094 1259lem4 17095 1259lem5 17096 1259prm 17097 2503lem1 17098 2503lem2 17099 2503lem3 17100 4001lem1 17102 4001lem4 17105 4001prm 17106 log2ublem3 26930 log2ub 26931 bclbnd 27261 bposlem8 27272 2lgslem3d 27380 ex-prmo 30547 hgt750lem 34835 hgt750lem2 34836 60lcm7e420 42495 3exp7 42538 3lexlogpow5ineq1 42539 aks4d1p1 42561 sq7 42773 235t711 42782 ex-decpmul 42783 3cubeslem3r 43136 fmtno5lem4 48034 257prm 48039 fmtno4nprmfac193 48052 fmtno5fac 48060 m3prm 48070 139prmALT 48074 127prm 48077 m7prm 48078 ppivalnn4 48105 2exp340mod341 48224 8exp8mod9 48227 |
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