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Mirrors > Home > MPE Home > Th. List > 7cn | Structured version Visualization version GIF version |
Description: The number 7 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 |
---|---|
7cn | ⊢ 7 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-7 11693 | . 2 ⊢ 7 = (6 + 1) | |
2 | 6cn 11716 | . . 3 ⊢ 6 ∈ ℂ | |
3 | ax-1cn 10584 | . . 3 ⊢ 1 ∈ ℂ | |
4 | 2, 3 | addcli 10636 | . 2 ⊢ (6 + 1) ∈ ℂ |
5 | 1, 4 | eqeltri 2886 | 1 ⊢ 7 ∈ ℂ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2111 (class class class)co 7135 ℂcc 10524 1c1 10527 + caddc 10529 6c6 11684 7c7 11685 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 ax-1cn 10584 ax-addcl 10586 |
This theorem depends on definitions: df-bi 210 df-an 400 df-ex 1782 df-cleq 2791 df-clel 2870 df-2 11688 df-3 11689 df-4 11690 df-5 11691 df-6 11692 df-7 11693 |
This theorem is referenced by: 8cn 11722 8m1e7 11758 7p2e9 11786 7p3e10 12161 7t2e14 12195 7t4e28 12197 7t7e49 12200 cos2bnd 15533 23prm 16444 139prm 16449 163prm 16450 317prm 16451 631prm 16452 1259lem1 16456 1259lem2 16457 1259lem3 16458 1259lem4 16459 1259lem5 16460 1259prm 16461 2503lem1 16462 2503lem2 16463 2503lem3 16464 4001lem1 16466 4001lem4 16469 4001prm 16470 log2ublem3 25534 log2ub 25535 bclbnd 25864 bposlem8 25875 2lgslem3d 25983 ex-prmo 28244 hgt750lem 32032 hgt750lem2 32033 60lcm7e420 39298 3lexlogpow5ineq1 39341 235t711 39485 ex-decpmul 39486 3cubeslem3r 39628 fmtno5lem4 44073 257prm 44078 fmtno4nprmfac193 44091 fmtno5fac 44099 m3prm 44109 139prmALT 44113 127prm 44116 m7prm 44117 2exp340mod341 44251 8exp8mod9 44254 |
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