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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 12217 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12240 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11088 | . . 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 11028 1c1 11031 + caddc 11033 6c6 12208 7c7 12209 |
| 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 11088 ax-addcl 11090 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-clel 2812 df-2 12212 df-3 12213 df-4 12214 df-5 12215 df-6 12216 df-7 12217 |
| This theorem is referenced by: 8cn 12246 8m1e7 12277 7p2e9 12305 7p3e10 12686 7t2e14 12720 7t4e28 12722 7t7e49 12725 cos2bnd 16117 23prm 17050 139prm 17055 163prm 17056 317prm 17057 631prm 17058 1259lem1 17062 1259lem2 17063 1259lem3 17064 1259lem4 17065 1259lem5 17066 1259prm 17067 2503lem1 17068 2503lem2 17069 2503lem3 17070 4001lem1 17072 4001lem4 17075 4001prm 17076 log2ublem3 26918 log2ub 26919 bclbnd 27251 bposlem8 27262 2lgslem3d 27370 ex-prmo 30517 hgt750lem 34789 hgt750lem2 34790 60lcm7e420 42301 3exp7 42344 3lexlogpow5ineq1 42345 aks4d1p1 42367 sq7 42587 235t711 42596 ex-decpmul 42597 3cubeslem3r 42965 fmtno5lem4 47838 257prm 47843 fmtno4nprmfac193 47856 fmtno5fac 47864 m3prm 47874 139prmALT 47878 127prm 47881 m7prm 47882 2exp340mod341 48015 8exp8mod9 48018 |
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