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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 9202 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9212 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8177 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8191 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2304 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 (class class class)co 6017 ℝcr 8030 1c1 8032 + caddc 8034 2c2 9193 3c3 9194 |
| 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 1495 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-4 1558 ax-17 1574 ax-ial 1582 ax-ext 2213 ax-1re 8125 ax-addrcl 8128 |
| This theorem depends on definitions: df-bi 117 df-cleq 2224 df-clel 2227 df-2 9201 df-3 9202 |
| This theorem is referenced by: 3cn 9217 4re 9219 3ne0 9237 3ap0 9238 4pos 9239 1lt3 9314 3lt4 9315 2lt4 9316 3lt5 9319 3lt6 9324 2lt6 9325 3lt7 9330 2lt7 9331 3lt8 9337 2lt8 9338 3lt9 9345 2lt9 9346 1le3 9354 8th4div3 9362 halfpm6th 9363 3halfnz 9576 3lt10 9746 2lt10 9747 5eluz3 9794 uzuzle23 9795 uzuzle34 9797 uz3m2nn 9806 nn01to3 9850 3rp 9893 fz0to4untppr 10358 expnass 10906 sqrt9 11608 ef01bndlem 12316 sin01bnd 12317 cos2bnd 12320 sin01gt0 12322 cos01gt0 12323 egt2lt3 12340 flodddiv4 12496 starvndxnmulrndx 13226 scandxnmulrndx 13238 vscandxnmulrndx 13243 ipndxnmulrndx 13256 tsetndxnmulrndx 13275 plendxnmulrndx 13289 dsndxnmulrndx 13304 slotsdifunifndx 13314 dveflem 15449 sincosq3sgn 15551 sincosq4sgn 15552 cosq23lt0 15556 coseq0q4123 15557 coseq00topi 15558 coseq0negpitopi 15559 tangtx 15561 sincos6thpi 15565 pigt3 15567 pige3 15568 cos02pilt1 15574 lgsdir2lem1 15756 2lgslem3 15829 ex-fl 16321 ex-gcd 16327 |
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