Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
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 8955 | . 2 ⊢ 4 ∈ ℝ | |
2 | 1 | recni 7932 | 1 ⊢ 4 ∈ ℂ |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 2141 ℂcc 7772 4c4 8931 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-11 1499 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-ext 2152 ax-resscn 7866 ax-1re 7868 ax-addrcl 7871 |
This theorem depends on definitions: df-bi 116 df-nf 1454 df-sb 1756 df-clab 2157 df-cleq 2163 df-clel 2166 df-in 3127 df-ss 3134 df-2 8937 df-3 8938 df-4 8939 |
This theorem is referenced by: 5m1e4 9000 4p2e6 9021 4p3e7 9022 4p4e8 9023 4t2e8 9036 4d2e2 9038 8th4div3 9097 div4p1lem1div2 9131 5p5e10 9413 4t4e16 9441 6t5e30 9449 fzo0to42pr 10176 fldiv4p1lem1div2 10261 sq4e2t8 10573 sqoddm1div8 10629 4bc3eq4 10707 4bc2eq6 10708 resqrexlemover 10974 resqrexlemcalc1 10978 resqrexlemcalc3 10980 cos2bnd 11723 flodddiv4 11893 6gcd4e2 11950 6lcm4e12 12041 pythagtriplem1 12219 dveflem 13481 sincosq4sgn 13544 cosq23lt0 13548 sincos6thpi 13557 ex-exp 13762 ex-fac 13763 ex-bc 13764 |
Copyright terms: Public domain | W3C validator |