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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 12279 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12303 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11125 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11182 | . 2 ⊢ (6 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2857 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2141 (class class class)co 7391 ℂcc 11065 1c1 11068 + caddc 11070 6c6 12270 7c7 12271 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 ax-1cn 11125 ax-addcl 11127 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1799 df-cleq 2753 df-clel 2836 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 |
| This theorem is referenced by: 8cn 12309 8m1e7 12344 7p2e9 12372 7p3e10 12762 7t2e14 12796 7t4e28 12798 7t7e49 12801 cos2bnd 16211 23prm 17146 139prm 17151 163prm 17152 317prm 17153 631prm 17154 1259lem1 17158 1259lem2 17159 1259lem3 17160 1259lem4 17161 1259lem5 17162 1259prm 17163 2503lem1 17164 2503lem2 17165 2503lem3 17166 4001lem1 17168 4001lem4 17171 4001prm 17172 log2ublem3 27001 log2ub 27002 bclbnd 27332 bposlem8 27343 2lgslem3d 27451 ex-prmo 30618 hgt750lem 34906 hgt750lem2 34907 60lcm7e420 42588 3exp7 42631 3lexlogpow5ineq1 42632 aks4d1p1 42654 sq7 42866 235t711 42875 ex-decpmul 42876 3cubeslem3r 43229 fmtno5lem4 48126 257prm 48131 fmtno4nprmfac193 48144 fmtno5fac 48152 m3prm 48162 139prmALT 48166 127prm 48169 m7prm 48170 ppivalnn4 48197 2exp340mod341 48316 8exp8mod9 48319 |
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