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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 12389 | . 2 ⊢ 5 = (4 + 1) | |
| 2 | 4cn 12409 | . . 3 ⊢ 4 ∈ ℂ | |
| 3 | ax-1cn 11239 | . . 3 ⊢ 1 ∈ ℂ | |
| 4 | 2, 3 | addcli 11296 | . 2 ⊢ (4 + 1) ∈ ℂ |
| 5 | 1, 4 | eqeltri 2857 | 1 ⊢ 5 ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2145 (class class class)co 7412 ℂcc 11179 1c1 11182 + caddc 11184 4c4 12380 5c5 12381 |
| 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 2147 ax-9 2155 ax-ext 2733 ax-1cn 11239 ax-addcl 11241 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-cleq 2753 df-clel 2836 df-2 12386 df-3 12387 df-4 12388 df-5 12389 |
| This theorem is used by: 6cn 12415 6m1e5 12454 5p2e7 12479 5p3e8 12480 5p4e9 12481 5p5e10 12871 5t2e10 12900 5recm6rec 12945 bpoly4 16205 ef01bndlem 16332 5ndvds3 16563 5ndvds6 16564 dec5dvds 17222 dec5nprm 17224 2exp11 17247 2exp16 17248 prmlem1 17265 17prm 17275 139prm 17282 163prm 17283 317prm 17284 631prm 17285 1259lem1 17289 1259lem2 17290 1259lem3 17291 1259lem4 17292 2503lem1 17295 2503lem2 17296 2503lem3 17297 4001lem1 17299 4001lem2 17300 4001lem3 17301 4001lem4 17302 4001prm 17303 log2ublem3 27258 log2ub 27259 ppiub 27513 bclbnd 27589 bposlem4 27596 bposlem5 27597 bposlem6 27598 bposlem8 27600 bposlem9 27601 lgsdir2lem1 27634 2lgslem3c 27707 2lgsoddprmlem3d 27722 ex-fac 31034 fib6 35021 hgt750lem2 35264 12lcm5e60 43026 lcmineqlem23 43069 3lexlogpow5ineq1 43072 3lexlogpow5ineq5 43078 aks4d1p1p4 43089 aks4d1p1p6 43091 aks4d1p1p7 43092 25or6to4 43224 1p6e7 43281 2p7e9 43288 sqn5i 43310 4t5e20 43316 sq5 43319 235t711 43330 ex-decpmul 43331 inductionexd 45114 cos5t 47869 goldrasin 47873 goldracos5teq 47876 goldratmolem2 47877 goldratmolem3 47878 ceil5half3 48360 fmtno5lem1 48582 fmtno5lem2 48583 257prm 48590 fmtno4prmfac193 48602 fmtno4nprmfac193 48603 flsqrt5 48623 139prmALT 48625 127prm 48628 5tcu2e40 48644 41prothprmlem2 48647 41prothprm 48648 2exp340mod341 48775 gbpart8 48810 gpg5order 49102 linevalexample 49451 ackval3012 49748 5m4e1 50879 |
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