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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 12225 | . 2 ⊢ 7 = (6 + 1) | |
| 2 | 6cn 12248 | . . 3 ⊢ 6 ∈ ℂ | |
| 3 | ax-1cn 11096 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11150 | . 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 7368 ℂcc 11036 1c1 11039 + caddc 11041 6c6 12216 7c7 12217 |
| 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 11096 ax-addcl 11098 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-clel 2812 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 df-7 12225 |
| This theorem is referenced by: 8cn 12254 8m1e7 12285 7p2e9 12313 7p3e10 12694 7t2e14 12728 7t4e28 12730 7t7e49 12733 cos2bnd 16125 23prm 17058 139prm 17063 163prm 17064 317prm 17065 631prm 17066 1259lem1 17070 1259lem2 17071 1259lem3 17072 1259lem4 17073 1259lem5 17074 1259prm 17075 2503lem1 17076 2503lem2 17077 2503lem3 17078 4001lem1 17080 4001lem4 17083 4001prm 17084 log2ublem3 26926 log2ub 26927 bclbnd 27259 bposlem8 27270 2lgslem3d 27378 ex-prmo 30546 hgt750lem 34828 hgt750lem2 34829 60lcm7e420 42377 3exp7 42420 3lexlogpow5ineq1 42421 aks4d1p1 42443 sq7 42663 235t711 42672 ex-decpmul 42673 3cubeslem3r 43041 fmtno5lem4 47913 257prm 47918 fmtno4nprmfac193 47931 fmtno5fac 47939 m3prm 47949 139prmALT 47953 127prm 47956 m7prm 47957 2exp340mod341 48090 8exp8mod9 48093 |
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