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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 12304 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12328 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11154 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11211 | . 2 ⊢ (6 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2865 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 (class class class)co 7408 ℂcc 11094 1c1 11097 + caddc 11099 6c6 12295 7c7 12296 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-1cn 11154 ax-addcl 11156 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1807 df-cleq 2761 df-clel 2844 df-2 12299 df-3 12300 df-4 12301 df-5 12302 df-6 12303 df-7 12304 |
| This theorem is referenced by: 8cn 12334 8m1e7 12369 7p2e9 12397 7p3e10 12787 7t2e14 12821 7t4e28 12823 7t7e49 12826 cos2bnd 16240 23prm 17175 139prm 17180 163prm 17181 317prm 17182 631prm 17183 1259lem1 17187 1259lem2 17188 1259lem3 17189 1259lem4 17190 1259lem5 17191 1259prm 17192 2503lem1 17193 2503lem2 17194 2503lem3 17195 4001lem1 17197 4001lem4 17200 4001prm 17201 log2ublem3 27075 log2ub 27076 bclbnd 27406 bposlem8 27417 2lgslem3d 27525 ex-prmo 30747 hgt750lem 34979 hgt750lem2 34980 60lcm7e420 42662 3exp7 42705 3lexlogpow5ineq1 42706 aks4d1p1 42728 sq7 42940 235t711 42949 ex-decpmul 42950 3cubeslem3r 43303 fmtno5lem4 48190 257prm 48195 fmtno4nprmfac193 48208 fmtno5fac 48216 m3prm 48226 139prmALT 48230 127prm 48233 m7prm 48234 ppivalnn4 48261 2exp340mod341 48380 8exp8mod9 48383 |
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