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| Mirrors > Home > ILE Home > Th. List > 3re | GIF version | ||
| Description: The number 3 is real. (Contributed by NM, 27-May-1999.) |
| Ref | Expression |
|---|---|
| 3re | ⊢ 3 ∈ ℝ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-3 9367 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9377 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8326 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8340 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2311 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: ∈ wcel 2209 (class class class)co 6085 ℝcr 8179 1c1 8181 + caddc 8183 2c2 9358 3c3 9359 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-4 1563 ax-17 1579 ax-ial 1587 ax-ext 2220 ax-1re 8274 ax-addrcl 8277 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 df-clel 2234 df-2 9366 df-3 9367 |
| This theorem is used by: 3cn 9382 4re 9384 3ne0 9402 3ap0 9403 4pos 9404 1lt3 9481 3lt4 9482 2lt4 9483 3lt5 9486 3lt6 9491 2lt6 9492 3lt7 9497 2lt7 9498 3lt8 9504 2lt8 9505 3lt9 9512 2lt9 9513 1le3 9521 8th4div3 9529 halfpm6th 9530 3halfnz 9748 3lt10 9923 2lt10 9924 5eluz3 9971 uzuzle23 9972 uzuzle34 9974 uz3m2nn 9983 nn01to3 10027 3rp 10071 fz0to4untppr 10542 expnass 11097 sqrt9 11830 ef01bndlem 12542 sin01bnd 12543 cos2bnd 12546 sin01gt0 12548 cos01gt0 12549 egt2lt3 12566 flodddiv4 12722 starvndxnmulrndx 13551 scandxnmulrndx 13563 vscandxnmulrndx 13568 ipndxnmulrndx 13581 tsetndxnmulrndx 13600 plendxnmulrndx 13614 dsndxnmulrndx 13629 slotsdifunifndx 13639 dveflem 15918 sincosq3sgn 16021 sincosq4sgn 16022 cosq23lt0 16026 coseq0q4123 16027 coseq00topi 16028 coseq0negpitopi 16029 tangtx 16031 sincos6thpi 16035 pigt3 16037 pige3 16038 cos02pilt1 16044 log2tlbndlog2 16181 log2ublog2 16185 ppiqub 16254 chtqub 16257 bposlem2 16273 bposlem3 16274 bposlem4 16275 bposlem5 16276 bposlem6 16277 bposlem8 16279 bposlem9 16280 lgsdir2lem1 16313 2lgslem3 16386 konigsbergiedgwen 16891 konigsberglem1 16895 konigsberglem2 16896 konigsberglem3 16897 konigsberglem4 16898 ex-fl 16905 ex-gcd 16911 |
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