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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 9193 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9203 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8168 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8182 | . 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 6013 ℝcr 8021 1c1 8023 + caddc 8025 2c2 9184 3c3 9185 |
| 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 8116 ax-addrcl 8119 |
| This theorem depends on definitions: df-bi 117 df-cleq 2222 df-clel 2225 df-2 9192 df-3 9193 |
| This theorem is referenced by: 3cn 9208 4re 9210 3ne0 9228 3ap0 9229 4pos 9230 1lt3 9305 3lt4 9306 2lt4 9307 3lt5 9310 3lt6 9315 2lt6 9316 3lt7 9321 2lt7 9322 3lt8 9328 2lt8 9329 3lt9 9336 2lt9 9337 1le3 9345 8th4div3 9353 halfpm6th 9354 3halfnz 9567 3lt10 9737 2lt10 9738 5eluz3 9785 uzuzle23 9786 uzuzle34 9788 uz3m2nn 9797 nn01to3 9841 3rp 9884 fz0to4untppr 10349 expnass 10897 sqrt9 11599 ef01bndlem 12307 sin01bnd 12308 cos2bnd 12311 sin01gt0 12313 cos01gt0 12314 egt2lt3 12331 flodddiv4 12487 starvndxnmulrndx 13217 scandxnmulrndx 13229 vscandxnmulrndx 13234 ipndxnmulrndx 13247 tsetndxnmulrndx 13266 plendxnmulrndx 13280 dsndxnmulrndx 13295 slotsdifunifndx 13305 dveflem 15440 sincosq3sgn 15542 sincosq4sgn 15543 cosq23lt0 15547 coseq0q4123 15548 coseq00topi 15549 coseq0negpitopi 15550 tangtx 15552 sincos6thpi 15556 pigt3 15558 pige3 15559 cos02pilt1 15565 lgsdir2lem1 15747 2lgslem3 15820 ex-fl 16257 ex-gcd 16263 |
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