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| Mirrors > Home > MPE Home > Th. List > 5cn | Structured version Visualization version GIF version | ||
| Description: The number 5 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 |
|---|---|
| 5cn | ⊢ 5 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-5 12435 | . 2 ⊢ 5 = (4 + 1) | |
| 2 | 4cn 12455 | . . 3 ⊢ 4 ∈ ℂ | |
| 3 | ax-1cn 11285 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11342 | . 2 ⊢ (4 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2860 | 1 ⊢ 5 ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2147 (class class class)co 7443 ℂcc 11225 1c1 11228 + caddc 11230 4c4 12426 5c5 12427 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-1cn 11285 ax-addcl 11287 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2755 df-clel 2839 df-2 12432 df-3 12433 df-4 12434 df-5 12435 |
| This theorem is used by: 6cn 12461 6m1e5 12500 5p2e7 12525 5p3e8 12526 5p4e9 12527 5p5e10 12917 5t2e10 12946 5recm6rec 12991 bpoly4 16254 ef01bndlem 16381 5ndvds3 16612 5ndvds6 16613 dec5dvds 17271 dec5nprm 17273 2exp11 17296 2exp16 17297 prmlem1 17314 17prm 17324 139prm 17331 163prm 17332 317prm 17333 631prm 17334 1259lem1 17338 1259lem2 17339 1259lem3 17340 1259lem4 17341 2503lem1 17344 2503lem2 17345 2503lem3 17346 4001lem1 17348 4001lem2 17349 4001lem3 17350 4001lem4 17351 4001prm 17352 log2ublem3 27306 log2ub 27307 ppiub 27561 bclbnd 27637 bposlem4 27644 bposlem5 27645 bposlem6 27646 bposlem8 27648 bposlem9 27649 lgsdir2lem1 27682 2lgslem3c 27755 2lgsoddprmlem3d 27770 ex-fac 31082 fib6 35108 hgt750lem2 35351 12lcm5e60 43250 lcmineqlem23 43293 3lexlogpow5ineq1 43296 3lexlogpow5ineq5 43302 aks4d1p1p4 43313 aks4d1p1p6 43315 aks4d1p1p7 43316 25or6to4 43448 1p6e7 43506 2p7e9 43513 sqn5i 43535 4t5e20 43541 sq5 43544 235t711 43555 ex-decpmul 43556 inductionexd 45347 cos5t 48130 goldrasin 48134 goldracos5teq 48137 goldratmolem2 48138 goldratmolem3 48139 ceil5half3 48621 fmtno5lem1 48843 fmtno5lem2 48844 257prm 48851 fmtno4prmfac193 48863 fmtno4nprmfac193 48864 flsqrt5 48884 139prmALT 48886 127prm 48889 5tcu2e40 48905 41prothprmlem2 48908 41prothprm 48909 2exp340mod341 49036 gbpart8 49071 gpg5order 49363 linevalexample 49712 ackval3012 50009 5m4e1 51215 |
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