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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 12324 | . 2 ⊢ 5 = (4 + 1) | |
| 2 | 4cn 12344 | . . 3 ⊢ 4 ∈ ℂ | |
| 3 | ax-1cn 11176 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11233 | . 2 ⊢ (4 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2862 | 1 ⊢ 5 ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2146 (class class class)co 7423 ℂcc 11116 1c1 11119 + caddc 11121 4c4 12315 5c5 12316 |
| 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 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2738 ax-1cn 11176 ax-addcl 11178 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2758 df-clel 2841 df-2 12321 df-3 12322 df-4 12323 df-5 12324 |
| This theorem is used by: 6cn 12350 6m1e5 12389 5p2e7 12414 5p3e8 12415 5p4e9 12416 5p5e10 12805 5t2e10 12834 5recm6rec 12879 bpoly4 16138 ef01bndlem 16265 5ndvds3 16496 5ndvds6 16497 dec5dvds 17149 dec5nprm 17151 2exp11 17174 2exp16 17175 prmlem1 17192 17prm 17202 139prm 17209 163prm 17210 317prm 17211 631prm 17212 1259lem1 17216 1259lem2 17217 1259lem3 17218 1259lem4 17219 2503lem1 17222 2503lem2 17223 2503lem3 17224 4001lem1 17226 4001lem2 17227 4001lem3 17228 4001lem4 17229 4001prm 17230 log2ublem3 27150 log2ub 27151 ppiub 27405 bclbnd 27481 bposlem4 27488 bposlem5 27489 bposlem6 27490 bposlem8 27492 bposlem9 27493 lgsdir2lem1 27526 2lgslem3c 27599 2lgsoddprmlem3d 27614 ex-fac 30839 fib6 34828 hgt750lem2 35071 12lcm5e60 42816 lcmineqlem23 42859 3lexlogpow5ineq1 42862 3lexlogpow5ineq5 42868 aks4d1p1p4 42879 aks4d1p1p6 42881 aks4d1p1p7 42882 25or6to4 43014 sqn5i 43087 4t5e20 43093 sq5 43096 235t711 43107 ex-decpmul 43108 inductionexd 44922 cos5t 47657 goldrasin 47660 goldracos5teq 47663 goldratmolem2 47664 ceil5half3 48124 fmtno5lem1 48346 fmtno5lem2 48347 257prm 48354 fmtno4prmfac193 48366 fmtno4nprmfac193 48367 flsqrt5 48387 139prmALT 48389 127prm 48392 5tcu2e40 48408 41prothprmlem2 48411 41prothprm 48412 2exp340mod341 48539 gbpart8 48574 gpg5order 48866 linevalexample 49216 ackval3012 49513 5m4e1 50658 |
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