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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 12309 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12333 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11159 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11216 | . 2 ⊢ (6 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2859 | 1 ⊢ 7 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 (class class class)co 7412 ℂcc 11099 1c1 11102 + caddc 11104 6c6 12300 7c7 12301 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-1cn 11159 ax-addcl 11161 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-cleq 2755 df-clel 2838 df-2 12304 df-3 12305 df-4 12306 df-5 12307 df-6 12308 df-7 12309 |
| This theorem is referenced by: 8cn 12339 8m1e7 12374 7p2e9 12402 7p3e10 12792 7t2e14 12826 7t4e28 12828 7t7e49 12831 cos2bnd 16245 23prm 17180 83prm 17184 139prm 17185 163prm 17186 317prm 17187 631prm 17188 1259lem1 17192 1259lem2 17193 1259lem3 17194 1259lem4 17195 1259lem5 17196 1259prm 17197 2503lem1 17198 2503lem2 17199 2503lem3 17200 4001lem1 17202 4001lem4 17205 4001prm 17206 log2ublem3 27094 log2ub 27095 bclbnd 27425 bposlem8 27436 2lgslem3d 27544 ex-prmo 30791 hgt750lem 35019 hgt750lem2 35020 60lcm7e420 42758 3exp7 42801 3lexlogpow5ineq1 42802 aks4d1p1 42824 25or6to4 42954 sq7 43038 235t711 43047 ex-decpmul 43048 3cubeslem3r 43401 fmtno5lem4 48291 257prm 48296 fmtno4nprmfac193 48309 fmtno5fac 48317 m3prm 48327 139prmALT 48331 127prm 48334 m7prm 48335 ppivalnn4 48362 2exp340mod341 48481 8exp8mod9 48484 |
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