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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 11699 | . 2 ⊢ 7 = (6 + 1) | |
2 | 6cn 11722 | . . 3 ⊢ 6 ∈ ℂ | |
3 | ax-1cn 10589 | . . 3 ⊢ 1 ∈ ℂ | |
4 | 2, 3 | addcli 10641 | . 2 ⊢ (6 + 1) ∈ ℂ |
5 | 1, 4 | eqeltri 2909 | 1 ⊢ 7 ∈ ℂ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2110 (class class class)co 7150 ℂcc 10529 1c1 10532 + caddc 10534 6c6 11690 7c7 11691 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-ext 2793 ax-1cn 10589 ax-addcl 10591 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1777 df-cleq 2814 df-clel 2893 df-2 11694 df-3 11695 df-4 11696 df-5 11697 df-6 11698 df-7 11699 |
This theorem is referenced by: 8cn 11728 8m1e7 11764 7p2e9 11792 7p3e10 12167 7t2e14 12201 7t4e28 12203 7t7e49 12206 cos2bnd 15535 23prm 16446 139prm 16451 163prm 16452 317prm 16453 631prm 16454 1259lem1 16458 1259lem2 16459 1259lem3 16460 1259lem4 16461 1259lem5 16462 1259prm 16463 2503lem1 16464 2503lem2 16465 2503lem3 16466 4001lem1 16468 4001lem4 16471 4001prm 16472 log2ublem3 25520 log2ub 25521 bclbnd 25850 bposlem8 25861 2lgslem3d 25969 ex-prmo 28232 hgt750lem 31917 hgt750lem2 31918 235t711 39170 ex-decpmul 39171 3cubeslem3r 39277 fmtno5lem4 43712 257prm 43717 fmtno4nprmfac193 43730 fmtno5fac 43738 m3prm 43748 139prmALT 43753 127prm 43757 m7prm 43758 2exp340mod341 43892 8exp8mod9 43895 |
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