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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 12250 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12275 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11096 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11151 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7367 ℂcc 11036 1c1 11039 + caddc 11041 7c7 12241 8c8 12242 |
| 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 2708 ax-1cn 11096 ax-addcl 11098 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2728 df-clel 2811 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 |
| This theorem is referenced by: 9cn 12281 9m1e8 12310 8p2e10 12724 8t2e16 12759 8t5e40 12762 cos2bnd 16155 2exp11 17060 2exp16 17061 139prm 17094 163prm 17095 317prm 17096 631prm 17097 1259lem2 17102 1259lem3 17103 1259lem4 17104 1259lem5 17105 2503lem2 17108 2503lem3 17109 2503prm 17110 4001lem1 17111 4001lem2 17112 4001prm 17115 quart1cl 26818 quart1lem 26819 quart1 26820 quartlem1 26821 log2tlbnd 26909 log2ublem3 26912 log2ub 26913 bposlem8 27254 lgsdir2lem1 27288 lgsdir2lem5 27292 2lgslem3a 27359 2lgslem3b 27360 2lgslem3c 27361 2lgslem3d 27362 2lgslem3a1 27363 2lgslem3b1 27364 2lgslem3c1 27365 2lgslem3d1 27366 2lgsoddprmlem1 27371 2lgsoddprmlem2 27372 2lgsoddprmlem3a 27373 2lgsoddprmlem3b 27374 2lgsoddprmlem3c 27375 2lgsoddprmlem3d 27376 ex-exp 30520 hgt750lem2 34796 420lcm8e840 42450 3exp7 42492 3lexlogpow5ineq1 42493 3lexlogpow5ineq5 42499 aks4d1p1 42515 sq8 42729 ex-decpmul 42738 resqrtvalex 44072 imsqrtvalex 44073 sin5tlem4 47324 sin5tlem5 47325 fmtno5lem4 48019 257prm 48024 fmtnoprmfac2lem1 48029 fmtno4prmfac 48035 fmtno4nprmfac193 48037 fmtno5faclem3 48044 m3prm 48055 139prmALT 48059 127prm 48062 m7prm 48063 5tcu2e40 48078 2exp340mod341 48209 8exp8mod9 48212 nfermltl8rev 48218 evengpop3 48274 tgoldbachlt 48292 |
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