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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 12214 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12239 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11084 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11138 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2832 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 (class class class)co 7358 ℂcc 11024 1c1 11027 + caddc 11029 7c7 12205 8c8 12206 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-1cn 11084 ax-addcl 11086 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-cleq 2728 df-clel 2811 df-2 12208 df-3 12209 df-4 12210 df-5 12211 df-6 12212 df-7 12213 df-8 12214 |
| This theorem is referenced by: 9cn 12245 9m1e8 12274 8p2e10 12687 8t2e16 12722 8t5e40 12725 cos2bnd 16113 2exp11 17017 2exp16 17018 139prm 17051 163prm 17052 317prm 17053 631prm 17054 1259lem2 17059 1259lem3 17060 1259lem4 17061 1259lem5 17062 2503lem2 17065 2503lem3 17066 2503prm 17067 4001lem1 17068 4001lem2 17069 4001prm 17072 quart1cl 26820 quart1lem 26821 quart1 26822 quartlem1 26823 log2tlbnd 26911 log2ublem3 26914 log2ub 26915 bposlem8 27258 lgsdir2lem1 27292 lgsdir2lem5 27296 2lgslem3a 27363 2lgslem3b 27364 2lgslem3c 27365 2lgslem3d 27366 2lgslem3a1 27367 2lgslem3b1 27368 2lgslem3c1 27369 2lgslem3d1 27370 2lgsoddprmlem1 27375 2lgsoddprmlem2 27376 2lgsoddprmlem3a 27377 2lgsoddprmlem3b 27378 2lgsoddprmlem3c 27379 2lgsoddprmlem3d 27380 ex-exp 30525 hgt750lem2 34809 420lcm8e840 42275 3exp7 42317 3lexlogpow5ineq1 42318 3lexlogpow5ineq5 42324 aks4d1p1 42340 sq8 42562 ex-decpmul 42571 resqrtvalex 43896 imsqrtvalex 43897 fmtno5lem4 47812 257prm 47817 fmtnoprmfac2lem1 47822 fmtno4prmfac 47828 fmtno4nprmfac193 47830 fmtno5faclem3 47837 m3prm 47848 139prmALT 47852 127prm 47855 m7prm 47856 5tcu2e40 47871 2exp340mod341 47989 8exp8mod9 47992 nfermltl8rev 47998 evengpop3 48054 tgoldbachlt 48072 |
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