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Mirrors > Home > MPE Home > Th. List > 8cn | Structured version Visualization version GIF version |
Description: The number 8 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 |
---|---|
8cn | ⊢ 8 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-8 11707 | . 2 ⊢ 8 = (7 + 1) | |
2 | 7cn 11732 | . . 3 ⊢ 7 ∈ ℂ | |
3 | ax-1cn 10595 | . . 3 ⊢ 1 ∈ ℂ | |
4 | 2, 3 | addcli 10647 | . 2 ⊢ (7 + 1) ∈ ℂ |
5 | 1, 4 | eqeltri 2909 | 1 ⊢ 8 ∈ ℂ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 (class class class)co 7156 ℂcc 10535 1c1 10538 + caddc 10540 7c7 11698 8c8 11699 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-ext 2793 ax-1cn 10595 ax-addcl 10597 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-cleq 2814 df-clel 2893 df-2 11701 df-3 11702 df-4 11703 df-5 11704 df-6 11705 df-7 11706 df-8 11707 |
This theorem is referenced by: 9cn 11738 9m1e8 11772 8p2e10 12179 8t2e16 12214 8t5e40 12217 cos2bnd 15541 2exp16 16424 139prm 16457 163prm 16458 317prm 16459 631prm 16460 1259lem2 16465 1259lem3 16466 1259lem4 16467 1259lem5 16468 2503lem2 16471 2503lem3 16472 2503prm 16473 4001lem1 16474 4001lem2 16475 4001prm 16478 quart1cl 25432 quart1lem 25433 quart1 25434 quartlem1 25435 log2tlbnd 25523 log2ublem3 25526 log2ub 25527 bposlem8 25867 lgsdir2lem1 25901 lgsdir2lem5 25905 2lgslem3a 25972 2lgslem3b 25973 2lgslem3c 25974 2lgslem3d 25975 2lgslem3a1 25976 2lgslem3b1 25977 2lgslem3c1 25978 2lgslem3d1 25979 2lgsoddprmlem1 25984 2lgsoddprmlem2 25985 2lgsoddprmlem3a 25986 2lgsoddprmlem3b 25987 2lgsoddprmlem3c 25988 2lgsoddprmlem3d 25989 ex-exp 28229 hgt750lem2 31923 ex-decpmul 39198 fmtno5lem4 43738 257prm 43743 fmtnoprmfac2lem1 43748 fmtno4prmfac 43754 fmtno4nprmfac193 43756 fmtno5faclem3 43763 m3prm 43774 139prmALT 43779 127prm 43783 m7prm 43784 2exp11 43785 5tcu2e40 43800 2exp340mod341 43918 8exp8mod9 43921 nfermltl8rev 43927 evengpop3 43983 tgoldbachlt 44001 |
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