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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 12309 | . 2 ⊢ 8 = (7 + 1) | |
| 2 | 7cn 12335 | . . 3 ⊢ 7 ∈ ℂ | |
| 3 | ax-1cn 11158 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11215 | . 2 ⊢ (7 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2865 | 1 ⊢ 8 ∈ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 (class class class)co 7411 ℂcc 11098 1c1 11101 + caddc 11103 7c7 12300 8c8 12301 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-1cn 11158 ax-addcl 11160 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1807 df-cleq 2761 df-clel 2844 df-2 12303 df-3 12304 df-4 12305 df-5 12306 df-6 12307 df-7 12308 df-8 12309 |
| This theorem is referenced by: 9cn 12341 9m1e8 12374 8p2e10 12796 8t2e16 12831 8t5e40 12834 cos2bnd 16244 2exp11 17149 2exp16 17150 139prm 17184 163prm 17185 317prm 17186 631prm 17187 1259lem2 17192 1259lem3 17193 1259lem4 17194 1259lem5 17195 2503lem2 17198 2503lem3 17199 2503prm 17200 4001lem1 17201 4001lem2 17202 4001prm 17205 quart1cl 26985 quart1lem 26986 quart1 26987 quartlem1 26988 log2tlbnd 27076 log2ublem3 27079 log2ub 27080 bposlem8 27421 lgsdir2lem1 27455 lgsdir2lem5 27459 2lgslem3a 27526 2lgslem3b 27527 2lgslem3c 27528 2lgslem3d 27529 2lgslem3a1 27530 2lgslem3b1 27531 2lgslem3c1 27532 2lgslem3d1 27533 2lgsoddprmlem1 27538 2lgsoddprmlem2 27539 2lgsoddprmlem3a 27540 2lgsoddprmlem3b 27541 2lgsoddprmlem3c 27542 2lgsoddprmlem3d 27543 ex-exp 30742 hgt750lem2 34984 420lcm8e840 42668 3exp7 42710 3lexlogpow5ineq1 42711 3lexlogpow5ineq5 42717 aks4d1p1 42733 sq8 42948 ex-decpmul 42957 resqrtvalex 44263 imsqrtvalex 44264 sin5tlem4 47502 sin5tlem5 47503 fmtno5lem4 48197 257prm 48202 fmtnoprmfac2lem1 48207 fmtno4prmfac 48213 fmtno4nprmfac193 48215 fmtno5faclem3 48222 m3prm 48233 139prmALT 48237 127prm 48240 m7prm 48241 5tcu2e40 48256 2exp340mod341 48387 8exp8mod9 48390 nfermltl8rev 48396 evengpop3 48452 tgoldbachlt 48470 |
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