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Mirrors > Home > ILE Home > Th. List > 4cn | GIF version |
Description: The number 4 is a complex number. (Contributed by David A. Wheeler, 7-Jul-2016.) |
Ref | Expression |
---|---|
4cn | ⊢ 4 ∈ ℂ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 4re 8116 | . 2 ⊢ 4 ∈ ℝ | |
2 | 1 | recni 7131 | 1 ⊢ 4 ∈ ℂ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1433 ℂcc 6979 4c4 8091 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-11 1437 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-resscn 7068 ax-1re 7070 ax-addrcl 7073 |
This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-in 2979 df-ss 2986 df-2 8098 df-3 8099 df-4 8100 |
This theorem is referenced by: 4p2e6 8175 4p3e7 8176 4p4e8 8177 4t2e8 8190 4d2e2 8192 8th4div3 8250 div4p1lem1div2 8284 5p5e10 8547 4t4e16 8575 6t5e30 8583 fzo0to42pr 9229 fldiv4p1lem1div2 9307 sqoddm1div8 9625 4bc3eq4 9700 4bc2eq6 9701 resqrexlemover 9896 resqrexlemcalc1 9900 resqrexlemcalc3 9902 flodddiv4 10334 6gcd4e2 10384 6lcm4e12 10469 ex-fac 10565 ex-bc 10566 |
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