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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 12286 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12312 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11131 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11188 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2858 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2142 (class class class)co 7396 ℂcc 11071 1c1 11074 + caddc 11076 7c7 12277 8c8 12278 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-1cn 11131 ax-addcl 11133 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-ex 1800 df-cleq 2754 df-clel 2837 df-2 12280 df-3 12281 df-4 12282 df-5 12283 df-6 12284 df-7 12285 df-8 12286 |
| This theorem is referenced by: 9cn 12318 9m1e8 12351 8p2e10 12773 8t2e16 12808 8t5e40 12811 cos2bnd 16220 2exp11 17125 2exp16 17126 139prm 17160 163prm 17161 317prm 17162 631prm 17163 1259lem2 17168 1259lem3 17169 1259lem4 17170 1259lem5 17171 2503lem2 17174 2503lem3 17175 2503prm 17176 4001lem1 17177 4001lem2 17178 4001prm 17181 quart1cl 26919 quart1lem 26920 quart1 26921 quartlem1 26922 log2tlbnd 27010 log2ublem3 27013 log2ub 27014 bposlem8 27355 lgsdir2lem1 27389 lgsdir2lem5 27393 2lgslem3a 27460 2lgslem3b 27461 2lgslem3c 27462 2lgslem3d 27463 2lgslem3a1 27464 2lgslem3b1 27465 2lgslem3c1 27466 2lgslem3d1 27467 2lgsoddprmlem1 27472 2lgsoddprmlem2 27473 2lgsoddprmlem3a 27474 2lgsoddprmlem3b 27475 2lgsoddprmlem3c 27476 2lgsoddprmlem3d 27477 ex-exp 30652 hgt750lem2 34946 420lcm8e840 42628 3exp7 42670 3lexlogpow5ineq1 42671 3lexlogpow5ineq5 42677 aks4d1p1 42693 sq8 42906 ex-decpmul 42915 resqrtvalex 44221 imsqrtvalex 44222 sin5tlem4 47470 sin5tlem5 47471 fmtno5lem4 48165 257prm 48170 fmtnoprmfac2lem1 48175 fmtno4prmfac 48181 fmtno4nprmfac193 48183 fmtno5faclem3 48190 m3prm 48201 139prmALT 48205 127prm 48208 m7prm 48209 5tcu2e40 48224 2exp340mod341 48355 8exp8mod9 48358 nfermltl8rev 48364 evengpop3 48420 tgoldbachlt 48438 |
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