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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 2833 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7360 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 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-1cn 11087 ax-addcl 11089 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-clel 2812 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 26925 log2ub 26926 bclbnd 27257 bposlem8 27268 2lgslem3d 27376 ex-prmo 30544 hgt750lem 34811 hgt750lem2 34812 60lcm7e420 42463 3exp7 42506 3lexlogpow5ineq1 42507 aks4d1p1 42529 sq7 42742 235t711 42751 ex-decpmul 42752 3cubeslem3r 43133 fmtno5lem4 48031 257prm 48036 fmtno4nprmfac193 48049 fmtno5fac 48057 m3prm 48067 139prmALT 48071 127prm 48074 m7prm 48075 ppivalnn4 48102 2exp340mod341 48221 8exp8mod9 48224 |
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