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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 9297 | . 2 ⊢ 3 = (2 + 1) | |
| 2 | 2re 9307 | . . 3 ⊢ 2 ∈ ℝ | |
| 3 | 1re 8273 | . . 3 ⊢ 1 ∈ ℝ | |
| 4 | 2, 3 | readdcli 8287 | . 2 ⊢ (2 + 1) ∈ ℝ |
| 5 | 1, 4 | eqeltri 2305 | 1 ⊢ 3 ∈ ℝ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2203 (class class class)co 6050 ℝcr 8126 1c1 8128 + caddc 8130 2c2 9288 3c3 9289 |
| 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 1496 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-4 1559 ax-17 1575 ax-ial 1583 ax-ext 2214 ax-1re 8221 ax-addrcl 8224 |
| This theorem depends on definitions: df-bi 117 df-cleq 2225 df-clel 2228 df-2 9296 df-3 9297 |
| This theorem is referenced by: 3cn 9312 4re 9314 3ne0 9332 3ap0 9333 4pos 9334 1lt3 9409 3lt4 9410 2lt4 9411 3lt5 9414 3lt6 9419 2lt6 9420 3lt7 9425 2lt7 9426 3lt8 9432 2lt8 9433 3lt9 9440 2lt9 9441 1le3 9449 8th4div3 9457 halfpm6th 9458 3halfnz 9675 3lt10 9845 2lt10 9846 5eluz3 9893 uzuzle23 9894 uzuzle34 9896 uz3m2nn 9905 nn01to3 9949 3rp 9992 fz0to4untppr 10458 expnass 11007 sqrt9 11733 ef01bndlem 12442 sin01bnd 12443 cos2bnd 12446 sin01gt0 12448 cos01gt0 12449 egt2lt3 12466 flodddiv4 12622 starvndxnmulrndx 13357 scandxnmulrndx 13369 vscandxnmulrndx 13374 ipndxnmulrndx 13387 tsetndxnmulrndx 13406 plendxnmulrndx 13420 dsndxnmulrndx 13435 slotsdifunifndx 13445 dveflem 15591 sincosq3sgn 15693 sincosq4sgn 15694 cosq23lt0 15698 coseq0q4123 15699 coseq00topi 15700 coseq0negpitopi 15701 tangtx 15703 sincos6thpi 15707 pigt3 15709 pige3 15710 cos02pilt1 15716 lgsdir2lem1 15901 2lgslem3 15974 konigsbergiedgwen 16479 konigsberglem1 16483 konigsberglem2 16484 konigsberglem3 16485 konigsberglem4 16486 ex-fl 16493 ex-gcd 16499 |
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