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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 12304 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12330 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11153 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11210 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2859 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2143 (class class class)co 7410 ℂcc 11093 1c1 11096 + caddc 11098 7c7 12295 8c8 12296 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-1cn 11153 ax-addcl 11155 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-cleq 2755 df-clel 2838 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 |
| This theorem is referenced by: 9cn 12336 9m1e8 12369 8th4div3 12459 8p2e10 12791 8t2e16 12826 8t5e40 12829 cos2bnd 16239 2exp11 17144 2exp16 17145 139prm 17179 163prm 17180 317prm 17181 631prm 17182 1259lem2 17187 1259lem3 17188 1259lem4 17189 1259lem5 17190 2503lem2 17193 2503lem3 17194 2503prm 17195 4001lem1 17196 4001lem2 17197 4001prm 17200 quart1cl 27019 quart1lem 27020 quart1 27021 quartlem1 27022 log2tlbnd 27110 log2ublem3 27113 log2ub 27114 bposlem8 27455 lgsdir2lem1 27489 lgsdir2lem5 27493 2lgslem3a 27560 2lgslem3b 27561 2lgslem3c 27562 2lgslem3d 27563 2lgslem3a1 27564 2lgslem3b1 27565 2lgslem3c1 27566 2lgslem3d1 27567 2lgsoddprmlem1 27572 2lgsoddprmlem2 27573 2lgsoddprmlem3a 27574 2lgsoddprmlem3b 27575 2lgsoddprmlem3c 27576 2lgsoddprmlem3d 27577 ex-exp 30801 hgt750lem2 35039 420lcm8e840 42798 3exp7 42840 3lexlogpow5ineq1 42841 3lexlogpow5ineq5 42847 aks4d1p1 42863 sq8 43078 ex-decpmul 43087 resqrtvalex 44391 imsqrtvalex 44392 sin5tlem4 47633 sin5tlem5 47634 fmtno5lem4 48328 257prm 48333 fmtnoprmfac2lem1 48338 fmtno4prmfac 48344 fmtno4nprmfac193 48346 fmtno5faclem3 48353 m3prm 48364 139prmALT 48368 127prm 48371 m7prm 48372 5tcu2e40 48387 2exp340mod341 48518 8exp8mod9 48521 nfermltl8rev 48527 evengpop3 48583 tgoldbachlt 48601 |
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