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| Mirrors > Home > MPE Home > Th. List > 8cn | Structured version Visualization version GIF version | ||
| Description: The number 8 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 |
|---|---|
| 8cn | ⊢ 8 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-8 12305 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12331 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11154 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11211 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2865 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 (class class class)co 7408 ℂcc 11094 1c1 11097 + caddc 11099 7c7 12296 8c8 12297 |
| 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 df-8 12305 |
| This theorem is referenced by: 9cn 12337 9m1e8 12370 8p2e10 12792 8t2e16 12827 8t5e40 12830 cos2bnd 16240 2exp11 17145 2exp16 17146 139prm 17180 163prm 17181 317prm 17182 631prm 17183 1259lem2 17188 1259lem3 17189 1259lem4 17190 1259lem5 17191 2503lem2 17194 2503lem3 17195 2503prm 17196 4001lem1 17197 4001lem2 17198 4001prm 17201 quart1cl 26981 quart1lem 26982 quart1 26983 quartlem1 26984 log2tlbnd 27072 log2ublem3 27075 log2ub 27076 bposlem8 27417 lgsdir2lem1 27451 lgsdir2lem5 27455 2lgslem3a 27522 2lgslem3b 27523 2lgslem3c 27524 2lgslem3d 27525 2lgslem3a1 27526 2lgslem3b1 27527 2lgslem3c1 27528 2lgslem3d1 27529 2lgsoddprmlem1 27534 2lgsoddprmlem2 27535 2lgsoddprmlem3a 27536 2lgsoddprmlem3b 27537 2lgsoddprmlem3c 27538 2lgsoddprmlem3d 27539 ex-exp 30738 hgt750lem2 34980 420lcm8e840 42663 3exp7 42705 3lexlogpow5ineq1 42706 3lexlogpow5ineq5 42712 aks4d1p1 42728 sq8 42941 ex-decpmul 42950 resqrtvalex 44256 imsqrtvalex 44257 sin5tlem4 47495 sin5tlem5 47496 fmtno5lem4 48190 257prm 48195 fmtnoprmfac2lem1 48200 fmtno4prmfac 48206 fmtno4nprmfac193 48208 fmtno5faclem3 48215 m3prm 48226 139prmALT 48230 127prm 48233 m7prm 48234 5tcu2e40 48249 2exp340mod341 48380 8exp8mod9 48383 nfermltl8rev 48389 evengpop3 48445 tgoldbachlt 48463 |
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