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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 12244 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12269 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11090 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11145 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2833 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 (class class class)co 7361 ℂcc 11030 1c1 11033 + caddc 11035 7c7 12235 8c8 12236 |
| 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 11090 ax-addcl 11092 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-cleq 2729 df-clel 2812 df-2 12238 df-3 12239 df-4 12240 df-5 12241 df-6 12242 df-7 12243 df-8 12244 |
| This theorem is referenced by: 9cn 12275 9m1e8 12304 8p2e10 12718 8t2e16 12753 8t5e40 12756 cos2bnd 16149 2exp11 17054 2exp16 17055 139prm 17088 163prm 17089 317prm 17090 631prm 17091 1259lem2 17096 1259lem3 17097 1259lem4 17098 1259lem5 17099 2503lem2 17102 2503lem3 17103 2503prm 17104 4001lem1 17105 4001lem2 17106 4001prm 17109 quart1cl 26834 quart1lem 26835 quart1 26836 quartlem1 26837 log2tlbnd 26925 log2ublem3 26928 log2ub 26929 bposlem8 27271 lgsdir2lem1 27305 lgsdir2lem5 27309 2lgslem3a 27376 2lgslem3b 27377 2lgslem3c 27378 2lgslem3d 27379 2lgslem3a1 27380 2lgslem3b1 27381 2lgslem3c1 27382 2lgslem3d1 27383 2lgsoddprmlem1 27388 2lgsoddprmlem2 27389 2lgsoddprmlem3a 27390 2lgsoddprmlem3b 27391 2lgsoddprmlem3c 27392 2lgsoddprmlem3d 27393 ex-exp 30538 hgt750lem2 34815 420lcm8e840 42467 3exp7 42509 3lexlogpow5ineq1 42510 3lexlogpow5ineq5 42516 aks4d1p1 42532 sq8 42746 ex-decpmul 42755 resqrtvalex 44093 imsqrtvalex 44094 sin5tlem4 47343 sin5tlem5 47344 fmtno5lem4 48034 257prm 48039 fmtnoprmfac2lem1 48044 fmtno4prmfac 48050 fmtno4nprmfac193 48052 fmtno5faclem3 48059 m3prm 48070 139prmALT 48074 127prm 48077 m7prm 48078 5tcu2e40 48093 2exp340mod341 48224 8exp8mod9 48227 nfermltl8rev 48233 evengpop3 48289 tgoldbachlt 48307 |
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