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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 9181 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9191 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8156 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8170 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2302 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 (class class class)co 6007 ℝcr 8009 1c1 8011 + caddc 8013 2c2 9172 3c3 9173 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1493 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-4 1556 ax-17 1572 ax-ial 1580 ax-ext 2211 ax-1re 8104 ax-addrcl 8107 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 df-clel 2225 df-2 9180 df-3 9181 |
| This theorem is referenced by: 3cn 9196 4re 9198 3ne0 9216 3ap0 9217 4pos 9218 1lt3 9293 3lt4 9294 2lt4 9295 3lt5 9298 3lt6 9303 2lt6 9304 3lt7 9309 2lt7 9310 3lt8 9316 2lt8 9317 3lt9 9324 2lt9 9325 1le3 9333 8th4div3 9341 halfpm6th 9342 3halfnz 9555 3lt10 9725 2lt10 9726 uzuzle23 9778 uz3m2nn 9780 nn01to3 9824 3rp 9867 fz0to4untppr 10332 expnass 10879 sqrt9 11574 ef01bndlem 12282 sin01bnd 12283 cos2bnd 12286 sin01gt0 12288 cos01gt0 12289 egt2lt3 12306 flodddiv4 12462 starvndxnmulrndx 13192 scandxnmulrndx 13204 vscandxnmulrndx 13209 ipndxnmulrndx 13222 tsetndxnmulrndx 13241 plendxnmulrndx 13255 dsndxnmulrndx 13270 slotsdifunifndx 13280 dveflem 15415 sincosq3sgn 15517 sincosq4sgn 15518 cosq23lt0 15522 coseq0q4123 15523 coseq00topi 15524 coseq0negpitopi 15525 tangtx 15527 sincos6thpi 15531 pigt3 15533 pige3 15534 cos02pilt1 15540 lgsdir2lem1 15722 2lgslem3 15795 ex-fl 16144 ex-gcd 16150 |
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